[analyzer] Rename error constants to camelCase.

This change was generated by the following process:

- The script `pkg/analyzer/tool/messages/rename_error_constants.dart`
  was run. This generated the vast majority of the diffs.

- Then all modified files were reformatted using
  `tools/sdk/dart-sdk/bin/dart/format`.

- Finally, the script `pkg/analyzer/tool/messages/generate.dart` was
  run, to rebuild generated code.

Change-Id: I6a6a69644ed8740ad6269d98cb169076151824ed
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/444921
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>

pkg/_fe_analyzer_shared/lib/src/scanner/errors.dart

@@ -38,7 +38,7 @@ void translateErrorToken(ErrorToken token, ReportError reportError) {
       // TODO(paulberry,ahe): Fasta reports the error location as the entire
       // string; analyzer expects the end of the string.
       reportError(
-        ScannerErrorCode.UNTERMINATED_STRING_LITERAL,
+        ScannerErrorCode.unterminatedStringLiteral,
         endOffset - 1,
         null,
       );
@@ -48,7 +48,7 @@ void translateErrorToken(ErrorToken token, ReportError reportError) {
       // TODO(paulberry,ahe): Fasta reports the error location as the entire
       // comment; analyzer expects the end of the comment.
       reportError(
-        ScannerErrorCode.UNTERMINATED_MULTI_LINE_COMMENT,
+        ScannerErrorCode.unterminatedMultiLineComment,
         endOffset - 1,
         null,
       );
@@ -58,24 +58,24 @@ void translateErrorToken(ErrorToken token, ReportError reportError) {
       // TODO(paulberry,ahe): Fasta reports the error location as the entire
       // number; analyzer expects the end of the number.
       charOffset = endOffset - 1;
-      return _makeError(ScannerErrorCode.MISSING_DIGIT, null);
+      return _makeError(ScannerErrorCode.missingDigit, null);
 
     case "MISSING_HEX_DIGIT":
       // TODO(paulberry,ahe): Fasta reports the error location as the entire
       // number; analyzer expects the end of the number.
       charOffset = endOffset - 1;
-      return _makeError(ScannerErrorCode.MISSING_HEX_DIGIT, null);
+      return _makeError(ScannerErrorCode.missingHexDigit, null);
 
     case "ILLEGAL_CHARACTER":
       // We can safely assume `token.character` is non-`null` because this error
       // is only reported when there is a character associated with the token.
-      return _makeError(ScannerErrorCode.ILLEGAL_CHARACTER, [token.character!]);
+      return _makeError(ScannerErrorCode.illegalCharacter, [token.character!]);
 
     case "UNEXPECTED_SEPARATOR_IN_NUMBER":
-      return _makeError(ScannerErrorCode.UNEXPECTED_SEPARATOR_IN_NUMBER, null);
+      return _makeError(ScannerErrorCode.unexpectedSeparatorInNumber, null);
 
     case "UNSUPPORTED_OPERATOR":
-      return _makeError(ScannerErrorCode.UNSUPPORTED_OPERATOR, [
+      return _makeError(ScannerErrorCode.unsupportedOperator, [
         (token as UnsupportedOperator).token.lexeme,
       ]);
 
@@ -85,19 +85,19 @@ void translateErrorToken(ErrorToken token, ReportError reportError) {
         TokenType type = token.begin!.type;
         if (type == TokenType.OPEN_CURLY_BRACKET ||
             type == TokenType.STRING_INTERPOLATION_EXPRESSION) {
-          return _makeError(ScannerErrorCode.EXPECTED_TOKEN, ['}']);
+          return _makeError(ScannerErrorCode.expectedToken, ['}']);
         }
         if (type == TokenType.OPEN_SQUARE_BRACKET) {
-          return _makeError(ScannerErrorCode.EXPECTED_TOKEN, [']']);
+          return _makeError(ScannerErrorCode.expectedToken, [']']);
         }
         if (type == TokenType.OPEN_PAREN) {
-          return _makeError(ScannerErrorCode.EXPECTED_TOKEN, [')']);
+          return _makeError(ScannerErrorCode.expectedToken, [')']);
         }
         if (type == TokenType.LT) {
-          return _makeError(ScannerErrorCode.EXPECTED_TOKEN, ['>']);
+          return _makeError(ScannerErrorCode.expectedToken, ['>']);
         }
       } else if (errorCode == codeUnexpectedDollarInString) {
-        return _makeError(ScannerErrorCode.MISSING_IDENTIFIER, null);
+        return _makeError(ScannerErrorCode.missingIdentifier, null);
       }
       throw new UnimplementedError(
         '$errorCode "${errorCode.analyzerCodes?.first}"',

pkg/_fe_analyzer_shared/lib/src/scanner/errors.g.dart

@@ -29,52 +29,52 @@ import "package:_fe_analyzer_shared/src/base/errors.dart";
 class ScannerErrorCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the token that was expected but not found
-  static const ScannerErrorCode EXPECTED_TOKEN = const ScannerErrorCode(
+  static const ScannerErrorCode expectedToken = const ScannerErrorCode(
     'EXPECTED_TOKEN',
     "Expected to find '{0}'.",
   );
 
   /// Parameters:
   /// Object p0: the illegal character
-  static const ScannerErrorCode ILLEGAL_CHARACTER = const ScannerErrorCode(
+  static const ScannerErrorCode illegalCharacter = const ScannerErrorCode(
     'ILLEGAL_CHARACTER',
     "Illegal character '{0}'.",
   );
 
   /// No parameters.
-  static const ScannerErrorCode MISSING_DIGIT = const ScannerErrorCode(
+  static const ScannerErrorCode missingDigit = const ScannerErrorCode(
     'MISSING_DIGIT',
     "Decimal digit expected.",
   );
 
   /// No parameters.
-  static const ScannerErrorCode MISSING_HEX_DIGIT = const ScannerErrorCode(
+  static const ScannerErrorCode missingHexDigit = const ScannerErrorCode(
     'MISSING_HEX_DIGIT',
     "Hexadecimal digit expected.",
   );
 
   /// No parameters.
-  static const ScannerErrorCode MISSING_IDENTIFIER = const ScannerErrorCode(
+  static const ScannerErrorCode missingIdentifier = const ScannerErrorCode(
     'MISSING_IDENTIFIER',
     "Expected an identifier.",
   );
 
   /// No parameters.
-  static const ScannerErrorCode MISSING_QUOTE = const ScannerErrorCode(
+  static const ScannerErrorCode missingQuote = const ScannerErrorCode(
     'MISSING_QUOTE',
     "Expected quote (' or \").",
   );
 
   /// Parameters:
   /// Object p0: the path of the file that cannot be read
-  static const ScannerErrorCode UNABLE_GET_CONTENT = const ScannerErrorCode(
+  static const ScannerErrorCode unableGetContent = const ScannerErrorCode(
     'UNABLE_GET_CONTENT',
     "Unable to get content of '{0}'.",
   );
 
   /// No parameters.
   static const ScannerErrorCode
-  UNEXPECTED_DOLLAR_IN_STRING = const ScannerErrorCode(
+  unexpectedDollarInString = const ScannerErrorCode(
     'UNEXPECTED_DOLLAR_IN_STRING',
     "A '\$' has special meaning inside a string, and must be followed by an "
         "identifier or an expression in curly braces ({}).",
@@ -83,7 +83,7 @@ class ScannerErrorCode extends DiagnosticCode {
 
   /// No parameters.
   static const ScannerErrorCode
-  UNEXPECTED_SEPARATOR_IN_NUMBER = const ScannerErrorCode(
+  unexpectedSeparatorInNumber = const ScannerErrorCode(
     'UNEXPECTED_SEPARATOR_IN_NUMBER',
     "Digit separators ('_') in a number literal can only be placed between two "
         "digits.",
@@ -92,13 +92,13 @@ class ScannerErrorCode extends DiagnosticCode {
 
   /// Parameters:
   /// String p0: the unsupported operator
-  static const ScannerErrorCode UNSUPPORTED_OPERATOR = const ScannerErrorCode(
+  static const ScannerErrorCode unsupportedOperator = const ScannerErrorCode(
     'UNSUPPORTED_OPERATOR',
     "The '{0}' operator is not supported.",
   );
 
   /// No parameters.
-  static const ScannerErrorCode UNTERMINATED_MULTI_LINE_COMMENT =
+  static const ScannerErrorCode unterminatedMultiLineComment =
       const ScannerErrorCode(
         'UNTERMINATED_MULTI_LINE_COMMENT',
         "Unterminated multi-line comment.",
@@ -108,7 +108,7 @@ class ScannerErrorCode extends DiagnosticCode {
       );
 
   /// No parameters.
-  static const ScannerErrorCode UNTERMINATED_STRING_LITERAL =
+  static const ScannerErrorCode unterminatedStringLiteral =
       const ScannerErrorCode(
         'UNTERMINATED_STRING_LITERAL',
         "Unterminated string literal.",

pkg/analysis_server/lib/src/lsp/mapping.dart

@@ -52,21 +52,19 @@ final completionFilterTextSplitPattern = RegExp(r'=>|[\(]');
 final completionSetterTypePattern = RegExp(r'^\((\S+)\s+\S+\)$');
 
 final diagnosticTagsForErrorCode = <String, List<lsp.DiagnosticTag>>{
-  _diagnosticCode(WarningCode.DEAD_CODE): [lsp.DiagnosticTag.Unnecessary],
-  _diagnosticCode(HintCode.DEPRECATED_MEMBER_USE_FROM_SAME_PACKAGE): [
+  _diagnosticCode(WarningCode.deadCode): [lsp.DiagnosticTag.Unnecessary],
+  _diagnosticCode(HintCode.deprecatedMemberUseFromSamePackage): [
     lsp.DiagnosticTag.Deprecated,
   ],
-  _diagnosticCode(
-    HintCode.DEPRECATED_MEMBER_USE_FROM_SAME_PACKAGE_WITH_MESSAGE,
-  ): [lsp.DiagnosticTag.Deprecated],
-  _diagnosticCode(HintCode.DEPRECATED_MEMBER_USE): [
+  _diagnosticCode(HintCode.deprecatedMemberUseFromSamePackageWithMessage): [
     lsp.DiagnosticTag.Deprecated,
   ],
+  _diagnosticCode(HintCode.deprecatedMemberUse): [lsp.DiagnosticTag.Deprecated],
   'deprecated_member_use_from_same_package': [lsp.DiagnosticTag.Deprecated],
   'deprecated_member_use_from_same_package_with_message': [
     lsp.DiagnosticTag.Deprecated,
   ],
-  _diagnosticCode(HintCode.DEPRECATED_MEMBER_USE_WITH_MESSAGE): [
+  _diagnosticCode(HintCode.deprecatedMemberUseWithMessage): [
     lsp.DiagnosticTag.Deprecated,
   ],
 };

pkg/analysis_server/lib/src/services/completion/statement/statement_completion.dart

@@ -313,7 +313,7 @@ class StatementCompletionProcessor {
           : null;
     }
 
-    var expr = diagnosticMatching(ScannerErrorCode.UNTERMINATED_STRING_LITERAL);
+    var expr = diagnosticMatching(ScannerErrorCode.unterminatedStringLiteral);
     if (expr != null) {
       var source = utils.getNodeText(expr);
       var content = source;
@@ -339,18 +339,15 @@ class StatementCompletionProcessor {
         delimiter = content.substring(0, 1);
         loc = expr.offset + source.length;
       }
-      _removeError(ScannerErrorCode.UNTERMINATED_STRING_LITERAL);
+      _removeError(ScannerErrorCode.unterminatedStringLiteral);
       _addInsertEdit(loc, delimiter);
     }
     expr =
         diagnosticMatching(
-          ParserErrorCode.EXPECTED_TOKEN,
+          ParserErrorCode.expectedToken,
           partialMatch: "']'",
         ) ??
-        diagnosticMatching(
-          ScannerErrorCode.EXPECTED_TOKEN,
-          partialMatch: "']'",
-        );
+        diagnosticMatching(ScannerErrorCode.expectedToken, partialMatch: "']'");
     if (expr != null) {
       expr = expr.thisOrAncestorOfType<ListLiteral>();
       if (expr is ListLiteral) {
@@ -363,8 +360,8 @@ class StatementCompletionProcessor {
           } else {
             _addInsertEdit(loc, ']');
           }
-          _removeError(ParserErrorCode.EXPECTED_TOKEN, partialMatch: "']'");
-          _removeError(ScannerErrorCode.EXPECTED_TOKEN, partialMatch: "']'");
+          _removeError(ParserErrorCode.expectedToken, partialMatch: "']'");
+          _removeError(ScannerErrorCode.expectedToken, partialMatch: "']'");
         }
       }
     }
@@ -436,7 +433,7 @@ class StatementCompletionProcessor {
     var delta = 0;
     if (diagnostics.isNotEmpty) {
       var error = _findDiagnostic(
-        ParserErrorCode.EXPECTED_TOKEN,
+        ParserErrorCode.expectedToken,
         partialMatch: "';'",
       );
       if (error != null) {
@@ -752,9 +749,7 @@ class StatementCompletionProcessor {
     var needsParen = false;
     int computeExitPos(FormalParameterList parameters) {
       if (needsParen = parameters.rightParenthesis.isSynthetic) {
-        var error = _findDiagnostic(
-          ParserErrorCode.MISSING_CLOSING_PARENTHESIS,
-        );
+        var error = _findDiagnostic(ParserErrorCode.missingClosingParenthesis);
         if (error != null) {
           return error.offset - 1;
         }
@@ -794,7 +789,7 @@ class StatementCompletionProcessor {
       return false;
     }
     var error = _findDiagnostic(
-      ParserErrorCode.EXPECTED_TOKEN,
+      ParserErrorCode.expectedToken,
       partialMatch: "';'",
     );
     if (error != null) {
@@ -928,8 +923,8 @@ class StatementCompletionProcessor {
 
   bool _complete_methodCall(AstNode node) {
     var parenError =
-        _findDiagnostic(ParserErrorCode.EXPECTED_TOKEN, partialMatch: "')'") ??
-        _findDiagnostic(ScannerErrorCode.EXPECTED_TOKEN, partialMatch: "')'");
+        _findDiagnostic(ParserErrorCode.expectedToken, partialMatch: "')'") ??
+        _findDiagnostic(ScannerErrorCode.expectedToken, partialMatch: "')'");
     if (parenError == null) {
       return false;
     }
@@ -947,7 +942,7 @@ class StatementCompletionProcessor {
     var loc = min(selectionOffset, argList.end);
     _addInsertEdit(loc, ')');
     var semicolonError = _findDiagnostic(
-      ParserErrorCode.EXPECTED_TOKEN,
+      ParserErrorCode.expectedToken,
       partialMatch: "';'",
     );
     if (semicolonError != null) {
@@ -982,7 +977,7 @@ class StatementCompletionProcessor {
       return false;
     }
     var error = _findDiagnostic(
-      ParserErrorCode.EXPECTED_TOKEN,
+      ParserErrorCode.expectedToken,
       partialMatch: "';'",
     );
     if (error != null) {
@@ -1075,7 +1070,7 @@ class StatementCompletionProcessor {
         if (onKeyword != null && exceptionType != null) {
           if (exceptionType.length == 0 ||
               _findDiagnostic(
-                    CompileTimeErrorCode.NON_TYPE_IN_CATCH_CLAUSE,
+                    CompileTimeErrorCode.nonTypeInCatchClause,
                     partialMatch: "name 'catch",
                   ) !=
                   null) {

pkg/analysis_server/lib/src/services/correction/bulk_fix_processor.dart

@@ -90,9 +90,9 @@ class BulkFixProcessor {
   /// will almost certainly be invalid code.
   static const Map<DiagnosticCode, List<MultiProducerGenerator>>
   nonLintMultiProducerMap = {
-    CompileTimeErrorCode.ARGUMENT_TYPE_NOT_ASSIGNABLE: [DataDriven.new],
-    CompileTimeErrorCode.CAST_TO_NON_TYPE: [DataDriven.new],
-    CompileTimeErrorCode.EXTENDS_NON_CLASS: [DataDriven.new],
+    CompileTimeErrorCode.argumentTypeNotAssignable: [DataDriven.new],
+    CompileTimeErrorCode.castToNonType: [DataDriven.new],
+    CompileTimeErrorCode.extendsNonClass: [DataDriven.new],
     // TODO(brianwilkerson): The following fix fails if an invocation of the
     //  function is the argument that needs to be removed.
     // CompileTimeErrorCode.EXTRA_POSITIONAL_ARGUMENTS: [
@@ -103,53 +103,41 @@ class BulkFixProcessor {
     // CompileTimeErrorCode.EXTRA_POSITIONAL_ARGUMENTS_COULD_BE_NAMED: [
     //   DataDriven.newInstance,
     // ],
-    CompileTimeErrorCode.IMPLEMENTS_NON_CLASS: [DataDriven.new],
-    CompileTimeErrorCode.INVALID_OVERRIDE: [DataDriven.new],
-    CompileTimeErrorCode.INVALID_OVERRIDE_SETTER: [DataDriven.new],
-    CompileTimeErrorCode.MISSING_REQUIRED_ARGUMENT: [DataDriven.new],
-    CompileTimeErrorCode.MIXIN_OF_NON_CLASS: [DataDriven.new],
-    CompileTimeErrorCode.NEW_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT: [
+    CompileTimeErrorCode.implementsNonClass: [DataDriven.new],
+    CompileTimeErrorCode.invalidOverride: [DataDriven.new],
+    CompileTimeErrorCode.invalidOverrideSetter: [DataDriven.new],
+    CompileTimeErrorCode.missingRequiredArgument: [DataDriven.new],
+    CompileTimeErrorCode.mixinOfNonClass: [DataDriven.new],
+    CompileTimeErrorCode.newWithUndefinedConstructorDefault: [DataDriven.new],
+    CompileTimeErrorCode.nonTypeAsTypeArgument: [DataDriven.new],
+    CompileTimeErrorCode.notEnoughPositionalArgumentsNamePlural: [
       DataDriven.new,
     ],
-    CompileTimeErrorCode.NON_TYPE_AS_TYPE_ARGUMENT: [DataDriven.new],
-    CompileTimeErrorCode.NOT_ENOUGH_POSITIONAL_ARGUMENTS_NAME_PLURAL: [
+    CompileTimeErrorCode.notEnoughPositionalArgumentsNameSingular: [
       DataDriven.new,
     ],
-    CompileTimeErrorCode.NOT_ENOUGH_POSITIONAL_ARGUMENTS_NAME_SINGULAR: [
+    CompileTimeErrorCode.notEnoughPositionalArgumentsPlural: [DataDriven.new],
+    CompileTimeErrorCode.notEnoughPositionalArgumentsSingular: [DataDriven.new],
+    CompileTimeErrorCode.undefinedClass: [DataDriven.new],
+    CompileTimeErrorCode.undefinedExtensionGetter: [DataDriven.new],
+    CompileTimeErrorCode.undefinedFunction: [DataDriven.new],
+    CompileTimeErrorCode.undefinedGetter: [DataDriven.new],
+    CompileTimeErrorCode.undefinedIdentifier: [DataDriven.new],
+    CompileTimeErrorCode.undefinedMethod: [DataDriven.new],
+    CompileTimeErrorCode.undefinedNamedParameter: [DataDriven.new],
+    CompileTimeErrorCode.undefinedSetter: [DataDriven.new],
+    CompileTimeErrorCode.wrongNumberOfTypeArguments: [DataDriven.new],
+    CompileTimeErrorCode.wrongNumberOfTypeArgumentsConstructor: [
       DataDriven.new,
     ],
-    CompileTimeErrorCode.NOT_ENOUGH_POSITIONAL_ARGUMENTS_PLURAL: [
-      DataDriven.new,
-    ],
-    CompileTimeErrorCode.NOT_ENOUGH_POSITIONAL_ARGUMENTS_SINGULAR: [
-      DataDriven.new,
-    ],
-    CompileTimeErrorCode.UNDEFINED_CLASS: [DataDriven.new],
-    CompileTimeErrorCode.UNDEFINED_EXTENSION_GETTER: [DataDriven.new],
-    CompileTimeErrorCode.UNDEFINED_FUNCTION: [DataDriven.new],
-    CompileTimeErrorCode.UNDEFINED_GETTER: [DataDriven.new],
-    CompileTimeErrorCode.UNDEFINED_IDENTIFIER: [DataDriven.new],
-    CompileTimeErrorCode.UNDEFINED_METHOD: [DataDriven.new],
-    CompileTimeErrorCode.UNDEFINED_NAMED_PARAMETER: [DataDriven.new],
-    CompileTimeErrorCode.UNDEFINED_SETTER: [DataDriven.new],
-    CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS: [DataDriven.new],
-    CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_CONSTRUCTOR: [
-      DataDriven.new,
-    ],
-    CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_EXTENSION: [
-      DataDriven.new,
-    ],
-    CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_METHOD: [
-      DataDriven.new,
-    ],
-    HintCode.DEPRECATED_MEMBER_USE: [DataDriven.new],
-    HintCode.DEPRECATED_MEMBER_USE_FROM_SAME_PACKAGE: [DataDriven.new],
-    HintCode.DEPRECATED_MEMBER_USE_FROM_SAME_PACKAGE_WITH_MESSAGE: [
-      DataDriven.new,
-    ],
-    HintCode.DEPRECATED_MEMBER_USE_WITH_MESSAGE: [DataDriven.new],
-    WarningCode.DEPRECATED_EXPORT_USE: [DataDriven.new],
-    WarningCode.OVERRIDE_ON_NON_OVERRIDING_METHOD: [DataDriven.new],
+    CompileTimeErrorCode.wrongNumberOfTypeArgumentsExtension: [DataDriven.new],
+    CompileTimeErrorCode.wrongNumberOfTypeArgumentsMethod: [DataDriven.new],
+    HintCode.deprecatedMemberUse: [DataDriven.new],
+    HintCode.deprecatedMemberUseFromSamePackage: [DataDriven.new],
+    HintCode.deprecatedMemberUseFromSamePackageWithMessage: [DataDriven.new],
+    HintCode.deprecatedMemberUseWithMessage: [DataDriven.new],
+    WarningCode.deprecatedExportUse: [DataDriven.new],
+    WarningCode.overrideOnNonOverridingMethod: [DataDriven.new],
   };
 
   /// Cached results of [_canBulkFix].
@@ -449,7 +437,7 @@ class BulkFixProcessor {
           details.add(
             BulkFix(pubspecFile.path, [
               BulkFixDetail(
-                PubspecWarningCode.MISSING_DEPENDENCY.name.toLowerCase(),
+                PubspecWarningCode.missingDependency.name.toLowerCase(),
                 1,
               ),
             ]),
@@ -662,9 +650,9 @@ class BulkFixProcessor {
           directivesOrderingError = diagnostic;
           break;
         }
-      } else if (diagnosticCode == WarningCode.DUPLICATE_IMPORT ||
-          diagnosticCode == HintCode.UNNECESSARY_IMPORT ||
-          diagnosticCode == WarningCode.UNUSED_IMPORT) {
+      } else if (diagnosticCode == WarningCode.duplicateImport ||
+          diagnosticCode == HintCode.unnecessaryImport ||
+          diagnosticCode == WarningCode.unusedImport) {
         unusedImportDiagnostics.add(diagnostic);
       }
     }
@@ -1147,9 +1135,9 @@ extension on Diagnostic {
   bool get isFixable {
     // Special cases that can be bulk fixed by this class but not by
     // FixProcessor.
-    if (diagnosticCode == WarningCode.DUPLICATE_IMPORT ||
-        diagnosticCode == HintCode.UNNECESSARY_IMPORT ||
-        diagnosticCode == WarningCode.UNUSED_IMPORT ||
+    if (diagnosticCode == WarningCode.duplicateImport ||
+        diagnosticCode == HintCode.unnecessaryImport ||
+        diagnosticCode == WarningCode.unusedImport ||
         (DirectivesOrdering.allCodes.contains(diagnosticCode))) {
       return true;
     }

pkg/analysis_server/lib/src/services/correction/dart/remove_comparison.dart

@@ -38,21 +38,20 @@ class RemoveComparison extends ResolvedCorrectionProducer {
   /// Whether the condition will always return `false`.
   bool get _conditionIsFalse {
     var diagnosticCode = (diagnostic as Diagnostic).diagnosticCode;
-    return diagnosticCode == WarningCode.UNNECESSARY_NAN_COMPARISON_FALSE ||
+    return diagnosticCode == WarningCode.unnecessaryNanComparisonFalse ||
         diagnosticCode ==
-            WarningCode.UNNECESSARY_NULL_COMPARISON_ALWAYS_NULL_FALSE ||
-        diagnosticCode ==
-            WarningCode.UNNECESSARY_NULL_COMPARISON_NEVER_NULL_FALSE ||
-        diagnosticCode == WarningCode.UNNECESSARY_TYPE_CHECK_FALSE;
+            WarningCode.unnecessaryNullComparisonAlwaysNullFalse ||
+        diagnosticCode == WarningCode.unnecessaryNullComparisonNeverNullFalse ||
+        diagnosticCode == WarningCode.unnecessaryTypeCheckFalse;
   }
 
   /// Whether the condition will always return `true`.
   bool get _conditionIsTrue {
     var errorCode = (diagnostic as Diagnostic).diagnosticCode;
-    return errorCode == WarningCode.UNNECESSARY_NAN_COMPARISON_TRUE ||
-        errorCode == WarningCode.UNNECESSARY_NULL_COMPARISON_ALWAYS_NULL_TRUE ||
-        errorCode == WarningCode.UNNECESSARY_NULL_COMPARISON_NEVER_NULL_TRUE ||
-        errorCode == WarningCode.UNNECESSARY_TYPE_CHECK_TRUE ||
+    return errorCode == WarningCode.unnecessaryNanComparisonTrue ||
+        errorCode == WarningCode.unnecessaryNullComparisonAlwaysNullTrue ||
+        errorCode == WarningCode.unnecessaryNullComparisonNeverNullTrue ||
+        errorCode == WarningCode.unnecessaryTypeCheckTrue ||
         errorCode == LinterLintCode.avoid_null_checks_in_equality_operators;
   }
 

pkg/analysis_server/lib/src/services/correction/fix/analysis_options/fix_generator.dart

@@ -31,12 +31,12 @@ import 'package:yaml_edit/yaml_edit.dart';
 /// The generator used to generate fixes in analysis options files.
 class AnalysisOptionsFixGenerator {
   static const List<DiagnosticCode> codesWithFixes = [
-    AnalysisOptionsWarningCode.DEPRECATED_LINT,
-    AnalysisOptionsWarningCode.ANALYSIS_OPTION_DEPRECATED_WITH_REPLACEMENT,
-    AnalysisOptionsWarningCode.DUPLICATE_RULE,
-    AnalysisOptionsWarningCode.REMOVED_LINT,
-    AnalysisOptionsWarningCode.UNDEFINED_LINT,
-    AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITHOUT_VALUES,
+    AnalysisOptionsWarningCode.deprecatedLint,
+    AnalysisOptionsWarningCode.analysisOptionDeprecatedWithReplacement,
+    AnalysisOptionsWarningCode.duplicateRule,
+    AnalysisOptionsWarningCode.removedLint,
+    AnalysisOptionsWarningCode.undefinedLint,
+    AnalysisOptionsWarningCode.unsupportedOptionWithoutValues,
   ];
 
   /// The resource provider used to access the file system.
@@ -91,8 +91,7 @@ class AnalysisOptionsFixGenerator {
     }
 
     if (diagnosticCode ==
-        AnalysisOptionsWarningCode
-            .ANALYSIS_OPTION_DEPRECATED_WITH_REPLACEMENT) {
+        AnalysisOptionsWarningCode.analysisOptionDeprecatedWithReplacement) {
       var analyzerMap = options['analyzer'];
       if (analyzerMap is! YamlMap) {
         return fixes;
@@ -116,13 +115,13 @@ class AnalysisOptionsFixGenerator {
           strongModeMap,
         );
       }
-    } else if (diagnosticCode == AnalysisOptionsWarningCode.DEPRECATED_LINT ||
-        diagnosticCode == AnalysisOptionsWarningCode.DUPLICATE_RULE ||
-        diagnosticCode == AnalysisOptionsWarningCode.REMOVED_LINT ||
-        diagnosticCode == AnalysisOptionsWarningCode.UNDEFINED_LINT) {
+    } else if (diagnosticCode == AnalysisOptionsWarningCode.deprecatedLint ||
+        diagnosticCode == AnalysisOptionsWarningCode.duplicateRule ||
+        diagnosticCode == AnalysisOptionsWarningCode.removedLint ||
+        diagnosticCode == AnalysisOptionsWarningCode.undefinedLint) {
       await _addFix_removeLint(coveringNodePath);
     } else if (diagnosticCode ==
-        AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITHOUT_VALUES) {
+        AnalysisOptionsWarningCode.unsupportedOptionWithoutValues) {
       await _addFix_removeSetting(coveringNodePath);
     }
     return fixes;

pkg/analysis_server/lib/src/services/correction/fix/pubspec/fix_generator.dart

@@ -25,8 +25,8 @@ import 'package:yaml/yaml.dart';
 /// The generator used to generate fixes in pubspec.yaml files.
 class PubspecFixGenerator {
   static const List<DiagnosticCode> codesWithFixes = [
-    PubspecWarningCode.MISSING_DEPENDENCY,
-    PubspecWarningCode.MISSING_NAME,
+    PubspecWarningCode.missingDependency,
+    PubspecWarningCode.missingName,
   ];
 
   /// The resource provider used to access the file system.
@@ -93,40 +93,37 @@ class PubspecFixGenerator {
       return fixes;
     }
 
-    if (diagnosticCode == PubspecWarningCode.ASSET_DOES_NOT_EXIST) {
+    if (diagnosticCode == PubspecWarningCode.assetDoesNotExist) {
       // Consider replacing the path with a valid path.
     } else if (diagnosticCode ==
-        PubspecWarningCode.ASSET_DIRECTORY_DOES_NOT_EXIST) {
+        PubspecWarningCode.assetDirectoryDoesNotExist) {
       // Consider replacing the path with a valid path.
       // Consider creating the directory.
-    } else if (diagnosticCode == PubspecWarningCode.ASSET_FIELD_NOT_LIST) {
+    } else if (diagnosticCode == PubspecWarningCode.assetFieldNotList) {
       // Not sure how to fix a structural issue.
-    } else if (diagnosticCode == PubspecWarningCode.ASSET_NOT_STRING) {
+    } else if (diagnosticCode == PubspecWarningCode.assetNotString) {
       // Not sure how to fix a structural issue.
-    } else if (diagnosticCode ==
-        PubspecWarningCode.DEPENDENCIES_FIELD_NOT_MAP) {
+    } else if (diagnosticCode == PubspecWarningCode.dependenciesFieldNotMap) {
       // Not sure how to fix a structural issue.
-    } else if (diagnosticCode == PubspecWarningCode.DEPRECATED_FIELD) {
+    } else if (diagnosticCode == PubspecWarningCode.deprecatedField) {
       // Consider removing the field.
-    } else if (diagnosticCode == PubspecWarningCode.FLUTTER_FIELD_NOT_MAP) {
+    } else if (diagnosticCode == PubspecWarningCode.flutterFieldNotMap) {
       // Not sure how to fix a structural issue.
-    } else if (diagnosticCode == PubspecWarningCode.INVALID_DEPENDENCY) {
+    } else if (diagnosticCode == PubspecWarningCode.invalidDependency) {
       // Consider adding `publish_to: none`.
-    } else if (diagnosticCode == PubspecWarningCode.MISSING_NAME) {
+    } else if (diagnosticCode == PubspecWarningCode.missingName) {
       await _addNameEntry();
-    } else if (diagnosticCode == PubspecWarningCode.NAME_NOT_STRING) {
+    } else if (diagnosticCode == PubspecWarningCode.nameNotString) {
       // Not sure how to fix a structural issue.
-    } else if (diagnosticCode == PubspecWarningCode.PATH_DOES_NOT_EXIST) {
+    } else if (diagnosticCode == PubspecWarningCode.pathDoesNotExist) {
       // Consider replacing the path with a valid path.
-    } else if (diagnosticCode == PubspecWarningCode.PATH_NOT_POSIX) {
+    } else if (diagnosticCode == PubspecWarningCode.pathNotPosix) {
       // Consider converting to a POSIX-style path.
-    } else if (diagnosticCode ==
-        PubspecWarningCode.PATH_PUBSPEC_DOES_NOT_EXIST) {
+    } else if (diagnosticCode == PubspecWarningCode.pathPubspecDoesNotExist) {
       // Consider replacing the path with a valid path.
-    } else if (diagnosticCode ==
-        PubspecWarningCode.UNNECESSARY_DEV_DEPENDENCY) {
+    } else if (diagnosticCode == PubspecWarningCode.unnecessaryDevDependency) {
       // Consider removing the dependency.
-    } else if (diagnosticCode == PubspecWarningCode.MISSING_DEPENDENCY) {
+    } else if (diagnosticCode == PubspecWarningCode.missingDependency) {
       await _addMissingDependency(diagnosticCode);
     }
     return fixes;

pkg/analysis_server/lib/src/services/correction/organize_imports.dart

@@ -65,9 +65,9 @@ class ImportOrganizer {
 
   bool _isUnusedImport(UriBasedDirective directive) {
     for (var diagnostic in diagnostics) {
-      if ((diagnostic.diagnosticCode == WarningCode.DUPLICATE_IMPORT ||
-              diagnostic.diagnosticCode == WarningCode.UNUSED_IMPORT ||
-              diagnostic.diagnosticCode == HintCode.UNNECESSARY_IMPORT) &&
+      if ((diagnostic.diagnosticCode == WarningCode.duplicateImport ||
+              diagnostic.diagnosticCode == WarningCode.unusedImport ||
+              diagnostic.diagnosticCode == HintCode.unnecessaryImport) &&
           directive.uri.offset == diagnostic.offset) {
         return true;
       }
@@ -77,7 +77,7 @@ class ImportOrganizer {
 
   bool _isUnusedShowName(SimpleIdentifier name) {
     for (var diagnostic in diagnostics) {
-      if ((diagnostic.diagnosticCode == WarningCode.UNUSED_SHOWN_NAME) &&
+      if ((diagnostic.diagnosticCode == WarningCode.unusedShownName) &&
           name.offset == diagnostic.offset) {
         return true;
       }

pkg/analysis_server/test/abstract_single_unit.dart

@@ -84,13 +84,13 @@ class AbstractSingleUnitTest extends AbstractContextTest {
     if (verifyNoTestUnitErrors) {
       expect(
         unitResult.diagnostics.where((d) {
-          return d.diagnosticCode != WarningCode.DEAD_CODE &&
-              d.diagnosticCode != WarningCode.UNUSED_CATCH_CLAUSE &&
-              d.diagnosticCode != WarningCode.UNUSED_CATCH_STACK &&
-              d.diagnosticCode != WarningCode.UNUSED_ELEMENT &&
-              d.diagnosticCode != WarningCode.UNUSED_FIELD &&
-              d.diagnosticCode != WarningCode.UNUSED_IMPORT &&
-              d.diagnosticCode != WarningCode.UNUSED_LOCAL_VARIABLE;
+          return d.diagnosticCode != WarningCode.deadCode &&
+              d.diagnosticCode != WarningCode.unusedCatchClause &&
+              d.diagnosticCode != WarningCode.unusedCatchStack &&
+              d.diagnosticCode != WarningCode.unusedElement &&
+              d.diagnosticCode != WarningCode.unusedField &&
+              d.diagnosticCode != WarningCode.unusedImport &&
+              d.diagnosticCode != WarningCode.unusedLocalVariable;
         }),
         isEmpty,
       );

pkg/analysis_server/test/protocol_server_test.dart

@@ -43,7 +43,7 @@ class AnalysisErrorTest {
     // prepare AnalysisError
     engineDiagnostic = MockDiagnostic(
       source: source,
-      diagnosticCode: engine.CompileTimeErrorCode.AMBIGUOUS_EXPORT,
+      diagnosticCode: engine.CompileTimeErrorCode.ambiguousExport,
       offset: 10,
       length: 20,
       message: 'my message',
@@ -111,7 +111,7 @@ class AnalysisErrorTest {
   void test_fromEngine_hasCorrection() {
     engineDiagnostic = MockDiagnostic(
       source: source,
-      diagnosticCode: engine.CompileTimeErrorCode.AMBIGUOUS_EXPORT,
+      diagnosticCode: engine.CompileTimeErrorCode.ambiguousExport,
       offset: 10,
       length: 20,
       message: 'my message',
@@ -202,7 +202,7 @@ class AnalysisErrorTest {
   void test_fromEngine_noCorrection() {
     engineDiagnostic = MockDiagnostic(
       source: source,
-      diagnosticCode: engine.CompileTimeErrorCode.AMBIGUOUS_EXPORT,
+      diagnosticCode: engine.CompileTimeErrorCode.ambiguousExport,
       offset: 10,
       length: 20,
       message: 'my message',

pkg/analysis_server/test/services/linter/linter_test.dart

@@ -66,7 +66,7 @@ linter:
   rules:
     - undefined
     ''',
-      [AnalysisOptionsWarningCode.UNDEFINED_LINT],
+      [AnalysisOptionsWarningCode.undefinedLint],
     );
   }
 

pkg/analysis_server/test/src/services/correction/fix/add_async_test.dart

@@ -72,7 +72,7 @@ Future<int> f() async {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.UNDEFINED_IDENTIFIER_AWAIT;
+            CompileTimeErrorCode.undefinedIdentifierAwait;
       },
     );
   }
@@ -91,7 +91,7 @@ void doStuff() => takeFutureCallback(() async => await 1);
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.UNDEFINED_IDENTIFIER_AWAIT;
+            CompileTimeErrorCode.undefinedIdentifierAwait;
       },
     );
   }
@@ -467,8 +467,7 @@ Future<int> f() async {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode ==
-            CompileTimeErrorCode.AWAIT_IN_WRONG_CONTEXT;
+        return error.diagnosticCode == CompileTimeErrorCode.awaitInWrongContext;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/add_await_test.dart

@@ -163,7 +163,7 @@ void f() async {
 }
 ''',
       errorFilter:
-          (error) => error.diagnosticCode != ParserErrorCode.EXPECTED_TOKEN,
+          (error) => error.diagnosticCode != ParserErrorCode.expectedToken,
     );
   }
 
@@ -327,7 +327,7 @@ Future<void> baz() async {
 ''',
       errorFilter:
           (error) =>
-              error.diagnosticCode == CompileTimeErrorCode.INVALID_ASSIGNMENT,
+              error.diagnosticCode == CompileTimeErrorCode.invalidAssignment,
     );
   }
 
@@ -342,7 +342,7 @@ void baz() {
     await assertNoFix(
       errorFilter:
           (error) =>
-              error.diagnosticCode == CompileTimeErrorCode.INVALID_ASSIGNMENT,
+              error.diagnosticCode == CompileTimeErrorCode.invalidAssignment,
     );
   }
 
@@ -364,7 +364,7 @@ Future<void> baz() async {
 ''',
       errorFilter:
           (error) =>
-              error.diagnosticCode == CompileTimeErrorCode.INVALID_ASSIGNMENT,
+              error.diagnosticCode == CompileTimeErrorCode.invalidAssignment,
     );
   }
 }

pkg/analysis_server/test/src/services/correction/fix/add_diagnostic_property_reference_test.dart

@@ -660,7 +660,7 @@ class C extends Widget with Diagnosticable {
 ''',
       errorFilter:
           (error) =>
-              error.diagnosticCode != CompileTimeErrorCode.UNDEFINED_CLASS,
+              error.diagnosticCode != CompileTimeErrorCode.undefinedClass,
     );
   }
 
@@ -695,7 +695,7 @@ class C extends Widget with Diagnosticable {
 ''',
       errorFilter:
           (error) =>
-              error.diagnosticCode != CompileTimeErrorCode.UNDEFINED_CLASS,
+              error.diagnosticCode != CompileTimeErrorCode.undefinedClass,
     );
   }
 

pkg/analysis_server/test/src/services/correction/fix/add_empty_argument_list_test.dart

@@ -31,7 +31,7 @@ class A {
 main() {}
 ''');
     await assertHasFixAllFix(
-      CompileTimeErrorCode.NO_ANNOTATION_CONSTRUCTOR_ARGUMENTS,
+      CompileTimeErrorCode.noAnnotationConstructorArguments,
       '''
 class A {
   const A();

pkg/analysis_server/test/src/services/correction/fix/add_enum_constant_test.dart

@@ -300,7 +300,7 @@ void f() {
 }
 ''',
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.UNDEFINED_ENUM_CONSTANT;
+        return e.diagnosticCode == CompileTimeErrorCode.undefinedEnumConstant;
       },
     );
   }
@@ -323,7 +323,7 @@ E e() {
 ''',
       errorFilter: (e) {
         return e.diagnosticCode ==
-            CompileTimeErrorCode.DOT_SHORTHAND_UNDEFINED_GETTER;
+            CompileTimeErrorCode.dotShorthandUndefinedGetter;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/add_explicit_cast_test.dart

@@ -31,7 +31,7 @@ f(A a) {
 class A {}
 class B {}
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.INVALID_ASSIGNMENT, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.invalidAssignment, '''
 f(A a) {
   B b, b2;
   b = a as B;
@@ -52,7 +52,7 @@ f(List<A> a) {
 class A {}
 class B {}
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.INVALID_ASSIGNMENT, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.invalidAssignment, '''
 f(List<A> a) {
   List<B> b, b2;
   b = a.where((e) => e is B).cast<B>().toList();
@@ -73,7 +73,7 @@ f(Map<A, B> a) {
 class A {}
 class B {}
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.INVALID_ASSIGNMENT, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.invalidAssignment, '''
 f(Map<A, B> a) {
   Map<B, A> b, b2;
   b = a.cast<B, A>();
@@ -96,7 +96,7 @@ class A {
 }
 class B {}
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.INVALID_ASSIGNMENT, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.invalidAssignment, '''
 f(A a) {
   B b, b2;
   b = (a..m()) as B;
@@ -119,7 +119,7 @@ f(Set<A> a) {
 class A {}
 class B {}
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.INVALID_ASSIGNMENT, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.invalidAssignment, '''
 f(Set<A> a) {
   Set<B> b, b2;
   b = a.cast<B>();
@@ -139,7 +139,7 @@ f(A a) {
 class A {}
 class B {}
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.INVALID_ASSIGNMENT, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.invalidAssignment, '''
 f(A a) {
   B b = a as B;
   B b2 = a as B;
@@ -158,7 +158,7 @@ f(List<A> a) {
 class A {}
 class B {}
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.INVALID_ASSIGNMENT, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.invalidAssignment, '''
 f(List<A> a) {
   List<B> b = a.where((e) => e is B).cast<B>().toList();
   List<B> b2 = a.where((e) => e is B).cast<B>().toList();
@@ -177,7 +177,7 @@ f(Map<A, B> a) {
 class A {}
 class B {}
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.INVALID_ASSIGNMENT, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.invalidAssignment, '''
 f(Map<A, B> a) {
   Map<B, A> b = a.cast<B, A>();
   Map<B, A> b2 = a.cast<B, A>();
@@ -198,7 +198,7 @@ class A {
 }
 class B {}
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.INVALID_ASSIGNMENT, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.invalidAssignment, '''
 f(A a) {
   B b = (a..m()) as B;
   B b2 = (a..m()) as B;
@@ -219,7 +219,7 @@ f(Set<A> a) {
 class A {}
 class B {}
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.INVALID_ASSIGNMENT, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.invalidAssignment, '''
 f(Set<A> a) {
   Set<B> b = a.cast<B>();
   Set<B> b2 = a.cast<B>();
@@ -645,7 +645,7 @@ void foo(int a) {
 ''');
     await assertNoFix(
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.INVALID_ASSIGNMENT;
+        return e.diagnosticCode == CompileTimeErrorCode.invalidAssignment;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/add_extension_override_test.dart

@@ -52,7 +52,7 @@ void f(String str) {
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.AMBIGUOUS_EXTENSION_MEMBER_ACCESS_TWO,
+              CompileTimeErrorCode.ambiguousExtensionMemberAccessTwo,
     );
 
     await assertHasFixesWithoutApplying(
@@ -64,7 +64,7 @@ void f(String str) {
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.AMBIGUOUS_EXTENSION_MEMBER_ACCESS_TWO,
+              CompileTimeErrorCode.ambiguousExtensionMemberAccessTwo,
     );
   }
 
@@ -128,7 +128,7 @@ f() {
       expectedNumberOfFixesForKind: 1,
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.AMBIGUOUS_EXTENSION_MEMBER_ACCESS_TWO;
+            CompileTimeErrorCode.ambiguousExtensionMemberAccessTwo;
       },
     );
   }
@@ -206,7 +206,7 @@ extension E2 on A {
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.AMBIGUOUS_EXTENSION_MEMBER_ACCESS_TWO,
+              CompileTimeErrorCode.ambiguousExtensionMemberAccessTwo,
     );
   }
 
@@ -242,7 +242,7 @@ extension E2 on A {
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.AMBIGUOUS_EXTENSION_MEMBER_ACCESS_TWO,
+              CompileTimeErrorCode.ambiguousExtensionMemberAccessTwo,
     );
   }
 
@@ -282,7 +282,7 @@ extension E2 on A {
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.AMBIGUOUS_EXTENSION_MEMBER_ACCESS_TWO,
+              CompileTimeErrorCode.ambiguousExtensionMemberAccessTwo,
     );
   }
 
@@ -391,7 +391,7 @@ void f(String str) {
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.AMBIGUOUS_EXTENSION_MEMBER_ACCESS_TWO,
+              CompileTimeErrorCode.ambiguousExtensionMemberAccessTwo,
     );
 
     await assertHasFixesWithoutApplying(
@@ -403,7 +403,7 @@ void f(String str) {
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.AMBIGUOUS_EXTENSION_MEMBER_ACCESS_TWO,
+              CompileTimeErrorCode.ambiguousExtensionMemberAccessTwo,
     );
   }
 }

pkg/analysis_server/test/src/services/correction/fix/add_late_test.dart

@@ -138,7 +138,7 @@ class C {
 ''',
       errorFilter:
           (error) =>
-              error.diagnosticCode == CompileTimeErrorCode.ASSIGNMENT_TO_FINAL,
+              error.diagnosticCode == CompileTimeErrorCode.assignmentToFinal,
     );
   }
 
@@ -177,7 +177,7 @@ void f(C c) {
 ''',
       errorFilter:
           (error) =>
-              error.diagnosticCode == CompileTimeErrorCode.ASSIGNMENT_TO_FINAL,
+              error.diagnosticCode == CompileTimeErrorCode.assignmentToFinal,
     );
   }
 
@@ -201,7 +201,7 @@ class C {
 ''',
       errorFilter:
           (error) =>
-              error.diagnosticCode == CompileTimeErrorCode.ASSIGNMENT_TO_FINAL,
+              error.diagnosticCode == CompileTimeErrorCode.assignmentToFinal,
     );
   }
 

pkg/analysis_server/test/src/services/correction/fix/add_missing_enum_case_clauses_test.dart

@@ -32,7 +32,7 @@ class AddMissingEnumCaseClausesTest extends FixProcessorTest {
     return (error) {
       if (!hasError &&
           error.diagnosticCode ==
-              StaticWarningCode.MISSING_ENUM_CONSTANT_IN_SWITCH) {
+              StaticWarningCode.missingEnumConstantInSwitch) {
         hasError = true;
         return true;
       }

pkg/analysis_server/test/src/services/correction/fix/add_missing_switch_cases_test.dart

@@ -252,7 +252,7 @@ int f(E x) {
       errorFilter:
           (e) =>
               e.diagnosticCode ==
-              CompileTimeErrorCode.NON_EXHAUSTIVE_SWITCH_EXPRESSION,
+              CompileTimeErrorCode.nonExhaustiveSwitchExpression,
     );
   }
 
@@ -369,7 +369,7 @@ class AddMissingSwitchCasesTest_SwitchStatement extends FixProcessorTest {
     return (diagnostic) {
       if (!hasError &&
           diagnostic.diagnosticCode ==
-              CompileTimeErrorCode.NON_EXHAUSTIVE_SWITCH_STATEMENT) {
+              CompileTimeErrorCode.nonExhaustiveSwitchStatement) {
         hasError = true;
         return true;
       }
@@ -522,7 +522,7 @@ void f(E e) {
       errorFilter:
           (e) =>
               e.diagnosticCode ==
-              CompileTimeErrorCode.NON_EXHAUSTIVE_SWITCH_STATEMENT,
+              CompileTimeErrorCode.nonExhaustiveSwitchStatement,
     );
   }
 

pkg/analysis_server/test/src/services/correction/fix/add_ne_null_test.dart

@@ -32,7 +32,7 @@ f(String p, String q) {
   }
 }
 ''');
-    await assertNoFixAllFix(CompileTimeErrorCode.NON_BOOL_CONDITION);
+    await assertNoFixAllFix(CompileTimeErrorCode.nonBoolCondition);
   }
 
   Future<void> test_nonBoolCondition_all_nullable() async {
@@ -46,7 +46,7 @@ f(String? p, String? q) {
   }
 }
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.NON_BOOL_CONDITION, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.nonBoolCondition, '''
 f(String? p, String? q) {
   if (p != null) {
     print(p);

pkg/analysis_server/test/src/services/correction/fix/add_null_check_test.dart

@@ -392,7 +392,7 @@ void g() {
       errorFilter:
           (diagnostic) =>
               diagnostic.diagnosticCode ==
-              CompileTimeErrorCode.INVALID_ASSIGNMENT,
+              CompileTimeErrorCode.invalidAssignment,
     );
   }
 
@@ -406,7 +406,7 @@ void g(int i) {
     await assertNoFix(
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.ARGUMENT_TYPE_NOT_ASSIGNABLE;
+            CompileTimeErrorCode.argumentTypeNotAssignable;
       },
     );
   }
@@ -449,7 +449,7 @@ void g(int i, int? x) {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.ARGUMENT_TYPE_NOT_ASSIGNABLE;
+            CompileTimeErrorCode.argumentTypeNotAssignable;
       },
     );
   }
@@ -464,7 +464,7 @@ void g(int i, int x) {
     await assertNoFix(
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.ARGUMENT_TYPE_NOT_ASSIGNABLE;
+            CompileTimeErrorCode.argumentTypeNotAssignable;
       },
     );
   }
@@ -479,7 +479,7 @@ void g(int i, int? x) {
     await assertNoFix(
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.ARGUMENT_TYPE_NOT_ASSIGNABLE;
+            CompileTimeErrorCode.argumentTypeNotAssignable;
       },
     );
   }
@@ -571,7 +571,7 @@ void f (List<int>? args) {
       errorFilter:
           (diagnostic) =>
               diagnostic.diagnosticCode !=
-              CompileTimeErrorCode.LIST_ELEMENT_TYPE_NOT_ASSIGNABLE,
+              CompileTimeErrorCode.listElementTypeNotAssignable,
     );
   }
 
@@ -622,7 +622,7 @@ f(List<String>? args) {
       errorFilter:
           (diagnostic) =>
               diagnostic.diagnosticCode !=
-              CompileTimeErrorCode.YIELD_EACH_OF_INVALID_TYPE,
+              CompileTimeErrorCode.yieldEachOfInvalidType,
     );
   }
 
@@ -645,8 +645,7 @@ g() {
       errorFilter:
           (diagnostic) =>
               diagnostic.diagnosticCode ==
-              CompileTimeErrorCode
-                  .UNCHECKED_USE_OF_NULLABLE_VALUE_IN_YIELD_EACH,
+              CompileTimeErrorCode.uncheckedUseOfNullableValueInYieldEach,
     );
   }
 
@@ -669,7 +668,7 @@ class C {
       errorFilter:
           (diagnostic) =>
               diagnostic.diagnosticCode !=
-              CompileTimeErrorCode.YIELD_EACH_OF_INVALID_TYPE,
+              CompileTimeErrorCode.yieldEachOfInvalidType,
     );
   }
 
@@ -688,7 +687,7 @@ Iterable<String> f(List<String>? args) sync* {
       errorFilter:
           (diagnostic) =>
               diagnostic.diagnosticCode !=
-              CompileTimeErrorCode.YIELD_EACH_OF_INVALID_TYPE,
+              CompileTimeErrorCode.yieldEachOfInvalidType,
     );
   }
 }

pkg/analysis_server/test/src/services/correction/fix/add_switch_case_break_test.dart

@@ -38,7 +38,7 @@ void f(Object? x) {
 }
 ''');
     await assertHasFixAllFix(
-      CompileTimeErrorCode.SWITCH_CASE_COMPLETES_NORMALLY,
+      CompileTimeErrorCode.switchCaseCompletesNormally,
       '''
 void f(Object? x) {
   switch (x) {

pkg/analysis_server/test/src/services/correction/fix/ambiguous_import_fix_test.dart

@@ -145,7 +145,7 @@ class C with M {}
 ''',
       matchFixMessage: "Hide others to use 'M' from 'lib4.dart'",
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.AMBIGUOUS_IMPORT;
+        return error.diagnosticCode == CompileTimeErrorCode.ambiguousImport;
       },
     );
   }
@@ -195,7 +195,7 @@ class C with M {}
 ''',
       matchFixMessage: "Hide others to use 'M' from 'lib3.dart'",
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.AMBIGUOUS_IMPORT;
+        return error.diagnosticCode == CompileTimeErrorCode.ambiguousImport;
       },
     );
   }
@@ -228,7 +228,7 @@ void foo(int i) {
 ''',
       matchFixMessage: "Hide others to use 'E' from 'lib1.dart'",
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.AMBIGUOUS_IMPORT;
+        return error.diagnosticCode == CompileTimeErrorCode.ambiguousImport;
       },
     );
   }
@@ -276,7 +276,7 @@ class C with M {}
 ''',
       matchFixMessage: "Hide others to use 'M' from 'lib1.dart'",
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.AMBIGUOUS_IMPORT;
+        return error.diagnosticCode == CompileTimeErrorCode.ambiguousImport;
       },
     );
   }
@@ -566,7 +566,7 @@ void f() {
       matchFixMessage: "Hide others to use 'N' from 'lib2.dart'",
       errorFilter:
           (error) =>
-              error.diagnosticCode == CompileTimeErrorCode.AMBIGUOUS_IMPORT,
+              error.diagnosticCode == CompileTimeErrorCode.ambiguousImport,
     );
   }
 
@@ -595,7 +595,7 @@ void f() {
       matchFixMessage: "Hide others to use 'N' from 'lib2.dart' as l",
       errorFilter:
           (error) =>
-              error.diagnosticCode == CompileTimeErrorCode.AMBIGUOUS_IMPORT,
+              error.diagnosticCode == CompileTimeErrorCode.ambiguousImport,
     );
   }
 
@@ -623,7 +623,7 @@ class C with M {}
 ''',
       matchFixMessage: "Hide others to use 'M' from 'lib1.dart'",
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.AMBIGUOUS_IMPORT;
+        return error.diagnosticCode == CompileTimeErrorCode.ambiguousImport;
       },
     );
     await assertHasFix(
@@ -636,7 +636,7 @@ class C with M {}
 ''',
       matchFixMessage: "Hide others to use 'M' from 'lib2.dart'",
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.AMBIGUOUS_IMPORT;
+        return error.diagnosticCode == CompileTimeErrorCode.ambiguousImport;
       },
     );
     await assertHasFix(
@@ -649,7 +649,7 @@ class C with M {}
 ''',
       matchFixMessage: "Hide others to use 'M' from 'lib3.dart'",
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.AMBIGUOUS_IMPORT;
+        return error.diagnosticCode == CompileTimeErrorCode.ambiguousImport;
       },
     );
   }
@@ -865,7 +865,7 @@ void f(N? n, O? o) {
 ''',
       errorFilter:
           (error) =>
-              error.diagnosticCode == CompileTimeErrorCode.AMBIGUOUS_IMPORT,
+              error.diagnosticCode == CompileTimeErrorCode.ambiguousImport,
       matchFixMessage: "Remove show to use 'N' from 'lib2.dart'",
     );
   }

pkg/analysis_server/test/src/services/correction/fix/change_to_test.dart

@@ -494,7 +494,7 @@ void f(A a) {
 }
 ''',
       errorFilter:
-          (e) => e.diagnosticCode == CompileTimeErrorCode.UNDEFINED_GETTER,
+          (e) => e.diagnosticCode == CompileTimeErrorCode.undefinedGetter,
     );
   }
 
@@ -521,7 +521,7 @@ void f() {
 }
 ''',
       errorFilter:
-          (e) => e.diagnosticCode == CompileTimeErrorCode.UNDEFINED_GETTER,
+          (e) => e.diagnosticCode == CompileTimeErrorCode.undefinedGetter,
     );
   }
 

pkg/analysis_server/test/src/services/correction/fix/convert_into_block_body_test.dart

@@ -242,7 +242,7 @@ void f() {
   });
 }
 ''');
-    await assertHasFixAllFix(WarningCode.UNNECESSARY_SET_LITERAL, '''
+    await assertHasFixAllFix(WarningCode.unnecessarySetLiteral, '''
 void g(void Function() fun) {}
 
 void f() {

pkg/analysis_server/test/src/services/correction/fix/convert_into_getter_test.dart

@@ -38,7 +38,7 @@ extension E on int {
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.EXTENSION_DECLARES_INSTANCE_FIELD,
+              CompileTimeErrorCode.extensionDeclaresInstanceField,
     );
   }
 
@@ -242,7 +242,7 @@ class A {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.IMPLICIT_THIS_REFERENCE_IN_INITIALIZER;
+            CompileTimeErrorCode.implicitThisReferenceInInitializer;
       },
     );
   }
@@ -266,7 +266,7 @@ class A {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.IMPLICIT_THIS_REFERENCE_IN_INITIALIZER;
+            CompileTimeErrorCode.implicitThisReferenceInInitializer;
       },
     );
   }
@@ -290,7 +290,7 @@ class A {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.IMPLICIT_THIS_REFERENCE_IN_INITIALIZER;
+            CompileTimeErrorCode.implicitThisReferenceInInitializer;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/convert_to_block_function_body_test.dart

@@ -50,7 +50,7 @@ void f() {
   g(() => {g(() => {1})});
 }
 ''');
-    await assertHasFixAllFix(WarningCode.UNNECESSARY_SET_LITERAL, '''
+    await assertHasFixAllFix(WarningCode.unnecessarySetLiteral, '''
 void g(void Function() fun) {}
 
 void f() {

pkg/analysis_server/test/src/services/correction/fix/convert_to_flutter_style_todo_test.dart

@@ -60,7 +60,7 @@ void f() { }
 /// Docs.
 // TODO(user): msg.
 void f() { }
-''', errorFilter: (e) => e.diagnosticCode != TodoCode.TODO);
+''', errorFilter: (e) => e.diagnosticCode != TodoCode.todo);
   }
 
   Future<void> test_docCommentSolo() async {
@@ -71,7 +71,7 @@ void f() { }
     await assertHasFix('''
 // TODO(user): msg.
 void f() { }
-''', errorFilter: (e) => e.diagnosticCode != TodoCode.TODO);
+''', errorFilter: (e) => e.diagnosticCode != TodoCode.todo);
   }
 
   Future<void> test_extraLeadingSpace() async {
@@ -82,7 +82,7 @@ void f() { }
     await assertHasFix('''
 // TODO(user): msg.
 void f() { }
-''', errorFilter: (e) => e.diagnosticCode != TodoCode.TODO);
+''', errorFilter: (e) => e.diagnosticCode != TodoCode.todo);
   }
 
   Future<void> test_lowerCase() async {
@@ -101,7 +101,7 @@ void f() { }
 // TODO(user msg.
 void f() { }
 ''');
-    await assertNoFix(errorFilter: (e) => e.diagnosticCode != TodoCode.TODO);
+    await assertNoFix(errorFilter: (e) => e.diagnosticCode != TodoCode.todo);
   }
 
   Future<void> test_missingColon() async {
@@ -112,7 +112,7 @@ void f() { }
     await assertHasFix('''
 // TODO(user): msg.
 void f() { }
-''', errorFilter: (e) => e.diagnosticCode != TodoCode.TODO);
+''', errorFilter: (e) => e.diagnosticCode != TodoCode.todo);
   }
 
   Future<void> test_missingColon_surroundingComments() async {
@@ -127,7 +127,7 @@ void f() { }
 // TODO(user): msg.
 // Trailing comment.
 void f() { }
-''', errorFilter: (e) => e.diagnosticCode != TodoCode.TODO);
+''', errorFilter: (e) => e.diagnosticCode != TodoCode.todo);
   }
 
   Future<void> test_missingColonAndMessage() async {
@@ -135,7 +135,7 @@ void f() { }
 // TODO(user)
 void f() {}
 ''');
-    await assertNoFix(errorFilter: (e) => e.diagnosticCode != TodoCode.TODO);
+    await assertNoFix(errorFilter: (e) => e.diagnosticCode != TodoCode.todo);
   }
 
   Future<void> test_missingLeadingSpace() async {
@@ -146,7 +146,7 @@ void f() {}
     await assertHasFix('''
 // TODO(user): msg.
 void f() {}
-''', errorFilter: (e) => e.diagnosticCode != TodoCode.TODO);
+''', errorFilter: (e) => e.diagnosticCode != TodoCode.todo);
   }
 
   Future<void> test_unwantedSpaceBeforeUser() async {
@@ -157,6 +157,6 @@ void f() {}
     await assertHasFix('''
 // TODO(user): msg.
 void f() {}
-''', errorFilter: (e) => e.diagnosticCode != TodoCode.TODO);
+''', errorFilter: (e) => e.diagnosticCode != TodoCode.todo);
   }
 }

pkg/analysis_server/test/src/services/correction/fix/convert_to_relative_import_test.dart

@@ -94,7 +94,7 @@ import 'foo';
 ''',
       errorFilter:
           (error) =>
-              error.diagnosticCode != CompileTimeErrorCode.URI_DOES_NOT_EXIST,
+              error.diagnosticCode != CompileTimeErrorCode.uriDoesNotExist,
     );
   }
 

pkg/analysis_server/test/src/services/correction/fix/create_class_test.dart

@@ -450,7 +450,7 @@ class Test {
 }
 ''',
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.UNDEFINED_FUNCTION;
+        return e.diagnosticCode == CompileTimeErrorCode.undefinedFunction;
       },
     );
   }
@@ -541,8 +541,7 @@ class Test {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode ==
-            CompileTimeErrorCode.UNDEFINED_IDENTIFIER;
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedIdentifier;
       },
     );
     assertLinkedGroup(change.linkedEditGroups[0], ['Test])', 'Test {']);

pkg/analysis_server/test/src/services/correction/fix/create_constructor_for_final_fields_test.dart

@@ -314,7 +314,7 @@ class Test {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-                CompileTimeErrorCode.FINAL_NOT_INITIALIZED &&
+                CompileTimeErrorCode.finalNotInitialized &&
             error.message.contains("'_a'");
       },
     );

pkg/analysis_server/test/src/services/correction/fix/create_extension_member_test.dart

@@ -891,8 +891,7 @@ extension E on int {
 ''',
       errorFilter:
           (diagnostic) =>
-              diagnostic.diagnosticCode ==
-              CompileTimeErrorCode.UNDEFINED_METHOD,
+              diagnostic.diagnosticCode == CompileTimeErrorCode.undefinedMethod,
     );
   }
 
@@ -911,14 +910,13 @@ extension E on A {
     await assertNoFix(
       errorFilter:
           (diagnostic) =>
-              diagnostic.diagnosticCode ==
-              CompileTimeErrorCode.UNDEFINED_METHOD,
+              diagnostic.diagnosticCode == CompileTimeErrorCode.undefinedMethod,
     );
     await assertNoFix(
       errorFilter:
           (diagnostic) =>
               diagnostic.diagnosticCode ==
-              CompileTimeErrorCode.INVALID_ASSIGNMENT,
+              CompileTimeErrorCode.invalidAssignment,
     );
   }
 
@@ -979,8 +977,7 @@ extension E on int {
 ''',
       errorFilter:
           (diagnostic) =>
-              diagnostic.diagnosticCode ==
-              CompileTimeErrorCode.UNDEFINED_METHOD,
+              diagnostic.diagnosticCode == CompileTimeErrorCode.undefinedMethod,
     );
   }
 
@@ -995,8 +992,7 @@ extension E on int {
     await assertNoFix(
       errorFilter:
           (diagnostic) =>
-              diagnostic.diagnosticCode ==
-              CompileTimeErrorCode.UNDEFINED_METHOD,
+              diagnostic.diagnosticCode == CompileTimeErrorCode.undefinedMethod,
     );
   }
 
@@ -1020,8 +1016,7 @@ extension E on int {
 ''',
       errorFilter:
           (diagnostic) =>
-              diagnostic.diagnosticCode ==
-              CompileTimeErrorCode.UNDEFINED_METHOD,
+              diagnostic.diagnosticCode == CompileTimeErrorCode.undefinedMethod,
     );
   }
 
@@ -1042,8 +1037,7 @@ extension E on B {
     await assertNoFix(
       errorFilter:
           (diagnostic) =>
-              diagnostic.diagnosticCode ==
-              CompileTimeErrorCode.UNDEFINED_METHOD,
+              diagnostic.diagnosticCode == CompileTimeErrorCode.undefinedMethod,
     );
   }
 

pkg/analysis_server/test/src/services/correction/fix/create_field_test.dart

@@ -278,7 +278,7 @@ A f() {
 ''',
       errorFilter: (e) {
         return e.diagnosticCode ==
-            CompileTimeErrorCode.DOT_SHORTHAND_UNDEFINED_GETTER;
+            CompileTimeErrorCode.dotShorthandUndefinedGetter;
       },
     );
   }
@@ -301,7 +301,7 @@ A f() {
 ''',
       errorFilter: (e) {
         return e.diagnosticCode ==
-            CompileTimeErrorCode.DOT_SHORTHAND_UNDEFINED_GETTER;
+            CompileTimeErrorCode.dotShorthandUndefinedGetter;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/create_missing_overrides_test.dart

@@ -46,8 +46,7 @@ class B implements A {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode
-                .NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_ONE;
+            CompileTimeErrorCode.nonAbstractClassInheritsAbstractMemberOne;
       },
     );
   }
@@ -76,8 +75,7 @@ class B implements A {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode
-                .NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_ONE;
+            CompileTimeErrorCode.nonAbstractClassInheritsAbstractMemberOne;
       },
     );
   }
@@ -105,8 +103,7 @@ class B implements A {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode
-                .NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_ONE;
+            CompileTimeErrorCode.nonAbstractClassInheritsAbstractMemberOne;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/create_mixin_test.dart

@@ -298,8 +298,7 @@ mixin Test {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode ==
-            CompileTimeErrorCode.UNDEFINED_IDENTIFIER;
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedIdentifier;
       },
     );
     assertLinkedGroup(change.linkedEditGroups[0], ['Test])', 'Test {']);

pkg/analysis_server/test/src/services/correction/fix/data_driven/data_driven_test_support.dart

@@ -60,7 +60,7 @@ mixin DataDrivenFixProcessorTestMixin on AbstractSingleUnitTest {
   /// A method that can be used as an error filter to ignore any unused_import
   /// diagnostics.
   bool ignoreUnusedImport(Diagnostic diagnostic) =>
-      diagnostic.diagnosticCode != WarningCode.UNUSED_IMPORT;
+      diagnostic.diagnosticCode != WarningCode.unusedImport;
 
   /// Sets the content of the library that defines the element referenced by the
   /// data on which this test is based.

pkg/analysis_server/test/src/services/correction/fix/import_library_hide_test.dart

@@ -42,7 +42,7 @@ void f(A a, B b, C c) {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_CLASS &&
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedClass &&
             testCode.indexOf('B b') == error.offset;
       },
     );
@@ -54,7 +54,7 @@ void f(A a, B b, C c) {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_CLASS &&
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedClass &&
             testCode.indexOf('C c') == error.offset;
       },
     );
@@ -89,7 +89,7 @@ void f(String s, lib.C c) {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_METHOD;
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedMethod;
       },
     );
   }
@@ -123,7 +123,7 @@ void f(String s, C c) {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_METHOD;
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedMethod;
       },
     );
   }
@@ -162,7 +162,7 @@ void f(String s, C c) {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_OPERATOR;
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedOperator;
       },
     );
   }
@@ -197,7 +197,7 @@ void f() {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_CLASS &&
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedClass &&
             testCode.indexOf('B?') == error.offset;
       },
     );
@@ -253,7 +253,7 @@ void f(A a1) {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-                CompileTimeErrorCode.UNDEFINED_IDENTIFIER &&
+                CompileTimeErrorCode.undefinedIdentifier &&
             testCode.indexOf('E.') == error.offset;
       },
     );
@@ -266,7 +266,7 @@ void f(A a1) {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-                CompileTimeErrorCode.UNDEFINED_IDENTIFIER &&
+                CompileTimeErrorCode.undefinedIdentifier &&
             testCode.indexOf("a')") == error.offset;
       },
     );

pkg/analysis_server/test/src/services/correction/fix/import_library_prefix_test.dart

@@ -71,7 +71,7 @@ void f() {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_CLASS;
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedClass;
       },
     );
   }
@@ -99,7 +99,7 @@ void f() {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_CLASS;
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedClass;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/import_library_project_test.dart

@@ -714,7 +714,7 @@ void f() {
 }
 ''',
       errorFilter:
-          (e) => e.diagnosticCode == CompileTimeErrorCode.UNDEFINED_FUNCTION,
+          (e) => e.diagnosticCode == CompileTimeErrorCode.undefinedFunction,
     );
   }
 

pkg/analysis_server/test/src/services/correction/fix/import_library_sdk_test.dart

@@ -269,8 +269,7 @@ class MyAnnotation {
 void f() {}
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode ==
-            CompileTimeErrorCode.UNDEFINED_IDENTIFIER;
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedIdentifier;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/import_library_show_test.dart

@@ -42,7 +42,7 @@ void f(A a, B b, C c) {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_CLASS &&
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedClass &&
             testCode.indexOf('B') == error.offset;
       },
     );
@@ -54,7 +54,7 @@ void f(A a, B b, C c) {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_CLASS &&
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedClass &&
             testCode.indexOf('C') == error.offset;
       },
     );
@@ -88,7 +88,7 @@ void f(String s, lib.C c) {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_METHOD;
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedMethod;
       },
     );
   }
@@ -121,7 +121,7 @@ void f(String s, C c) {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_METHOD;
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedMethod;
       },
     );
   }
@@ -159,7 +159,7 @@ void f(String s, C c) {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_OPERATOR;
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedOperator;
       },
     );
   }
@@ -193,7 +193,7 @@ void f() {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == CompileTimeErrorCode.UNDEFINED_CLASS &&
+        return error.diagnosticCode == CompileTimeErrorCode.undefinedClass &&
             testCode.indexOf('B') == error.offset;
       },
     );
@@ -248,7 +248,7 @@ void f(A a1) {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-                CompileTimeErrorCode.UNDEFINED_IDENTIFIER &&
+                CompileTimeErrorCode.undefinedIdentifier &&
             testCode.indexOf('E') == error.offset;
       },
     );
@@ -261,7 +261,7 @@ void f(A a1) {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-                CompileTimeErrorCode.UNDEFINED_IDENTIFIER &&
+                CompileTimeErrorCode.undefinedIdentifier &&
             testCode.indexOf("a')") == error.offset;
       },
     );

pkg/analysis_server/test/src/services/correction/fix/insert_body_test.dart

@@ -128,8 +128,7 @@ enum E
  {}''',
       errorFilter:
           (error) =>
-              error.diagnosticCode !=
-              CompileTimeErrorCode.ENUM_WITHOUT_CONSTANTS,
+              error.diagnosticCode != CompileTimeErrorCode.enumWithoutConstants,
     );
   }
 }

pkg/analysis_server/test/src/services/correction/fix/insert_on_keyword_test.dart

@@ -25,7 +25,7 @@ extension String {}
 extension String {}
 ''');
     var fixes = await getFixesForFirst(
-      (e) => e.diagnosticCode == ParserErrorCode.EXPECTED_TOKEN,
+      (e) => e.diagnosticCode == ParserErrorCode.expectedToken,
     );
     expect(fixes, hasLength(1));
     assertProduces(fixes.first, r'''
@@ -49,7 +49,7 @@ extension int {}
 extension on int {}
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == ParserErrorCode.EXPECTED_TOKEN;
+        return error.diagnosticCode == ParserErrorCode.expectedToken;
       },
     );
   }
@@ -90,7 +90,7 @@ extension List<int> {}
 extension on List<int> {}
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == ParserErrorCode.EXPECTED_TOKEN;
+        return error.diagnosticCode == ParserErrorCode.expectedToken;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/make_final_test.dart

@@ -182,7 +182,7 @@ f() {
 f() {
   var l = [ for (final i in [1, 2]) i + 3 ];
 }
-''', errorFilter: (e) => e.diagnosticCode != WarningCode.UNUSED_LOCAL_VARIABLE);
+''', errorFilter: (e) => e.diagnosticCode != WarningCode.unusedLocalVariable);
   }
 
   Future<void> test_listPattern() async {
@@ -195,7 +195,7 @@ f() {
 f() {
   for (final [i, j] in [[1, 2]]) { }
 }
-''', errorFilter: (e) => e.diagnosticCode != WarningCode.UNUSED_LOCAL_VARIABLE);
+''', errorFilter: (e) => e.diagnosticCode != WarningCode.unusedLocalVariable);
   }
 
   Future<void> test_mapPattern() async {
@@ -208,7 +208,7 @@ f() {
 f() {
   for (final {'i' : j} in [{'i' : 1}]) { }
 }
-''', errorFilter: (e) => e.diagnosticCode != WarningCode.UNUSED_LOCAL_VARIABLE);
+''', errorFilter: (e) => e.diagnosticCode != WarningCode.unusedLocalVariable);
   }
 
   Future<void> test_noType() async {
@@ -248,7 +248,7 @@ class A {
 f() {
   for (final A(:a) in [A(1)]) { }
 } 
-''', errorFilter: (e) => e.diagnosticCode != WarningCode.UNUSED_LOCAL_VARIABLE);
+''', errorFilter: (e) => e.diagnosticCode != WarningCode.unusedLocalVariable);
   }
 
   Future<void> test_recordPattern() async {
@@ -261,7 +261,7 @@ f() {
 f() {
   for (final (i, j) in [(1, 2)]) { }
 }
-''', errorFilter: (e) => e.diagnosticCode != WarningCode.UNUSED_LOCAL_VARIABLE);
+''', errorFilter: (e) => e.diagnosticCode != WarningCode.unusedLocalVariable);
   }
 
   Future<void> test_type() async {

pkg/analysis_server/test/src/services/correction/fix/merge_combinators_test.dart

@@ -34,7 +34,7 @@ import 'other.dart' show Stream, Future hide Stream;
         DartFixKind.MERGE_COMBINATORS_HIDE_SHOW,
       ],
       errorFilter: (error) {
-        return error.diagnosticCode == WarningCode.MULTIPLE_COMBINATORS;
+        return error.diagnosticCode == WarningCode.multipleCombinators;
       },
     );
   }
@@ -49,7 +49,7 @@ import 'other.dart' hide Stream hide Future;
         DartFixKind.MERGE_COMBINATORS_SHOW_HIDE,
       ],
       errorFilter: (error) {
-        return error.diagnosticCode == WarningCode.MULTIPLE_COMBINATORS;
+        return error.diagnosticCode == WarningCode.multipleCombinators;
       },
     );
   }
@@ -58,7 +58,7 @@ import 'other.dart' hide Stream hide Future;
 @reflectiveTest
 class MergeHideUsingHideTest extends _MergeCombinatorTest {
   @override
-  DiagnosticCode get diagnosticCode => WarningCode.MULTIPLE_COMBINATORS;
+  DiagnosticCode get diagnosticCode => WarningCode.multipleCombinators;
 
   @override
   FixKind get kind => DartFixKind.MERGE_COMBINATORS_HIDE_HIDE;
@@ -170,7 +170,7 @@ import 'other.dart' show Stream, FutureOr, Future show Stream, FutureOr;
 @reflectiveTest
 class MergeHideUsingShowTest extends _MergeCombinatorTest {
   @override
-  DiagnosticCode get diagnosticCode => WarningCode.MULTIPLE_COMBINATORS;
+  DiagnosticCode get diagnosticCode => WarningCode.multipleCombinators;
 
   @override
   FixKind get kind => DartFixKind.MERGE_COMBINATORS_SHOW_HIDE;
@@ -282,7 +282,7 @@ import 'other.dart' show Stream, FutureOr, Future show Stream, FutureOr;
 @reflectiveTest
 class MergeShowUsingHideTest extends _MergeCombinatorTest {
   @override
-  DiagnosticCode get diagnosticCode => WarningCode.MULTIPLE_COMBINATORS;
+  DiagnosticCode get diagnosticCode => WarningCode.multipleCombinators;
 
   @override
   FixKind get kind => DartFixKind.MERGE_COMBINATORS_HIDE_SHOW;
@@ -422,7 +422,7 @@ import 'other.dart' hide Completer, Future, Timer;
 @reflectiveTest
 class MergeShowUsingShowTest extends _MergeCombinatorTest {
   @override
-  DiagnosticCode get diagnosticCode => WarningCode.MULTIPLE_COMBINATORS;
+  DiagnosticCode get diagnosticCode => WarningCode.multipleCombinators;
 
   @override
   FixKind get kind => DartFixKind.MERGE_COMBINATORS_SHOW_SHOW;

pkg/analysis_server/test/src/services/correction/fix/organize_imports_test.dart

@@ -97,7 +97,7 @@ class OrganizeImportsDirectivesOrderingTest extends FixProcessorLintTest {
     var firstError = true;
     return (Diagnostic diagnostic) {
       if (firstError &&
-          diagnostic.diagnosticCode == WarningCode.UNUSED_SHOWN_NAME) {
+          diagnostic.diagnosticCode == WarningCode.unusedShownName) {
         firstError = false;
         return true;
       }

pkg/analysis_server/test/src/services/correction/fix/remove_abstract_test.dart

@@ -28,7 +28,7 @@ class MyClass {
   abstract void m2() {}
 }
 ''');
-    await assertHasFixAllFix(ParserErrorCode.ABSTRACT_CLASS_MEMBER, '''
+    await assertHasFixAllFix(ParserErrorCode.abstractClassMember, '''
 class MyClass {
   void m1() {}
   void m2() {}

pkg/analysis_server/test/src/services/correction/fix/remove_comparison_test.dart

@@ -22,7 +22,7 @@ void main() {
 }
 
 bool _ignoreDeadCode(Diagnostic diagnostic) =>
-    diagnostic.diagnosticCode != WarningCode.DEAD_CODE;
+    diagnostic.diagnosticCode != WarningCode.deadCode;
 
 @reflectiveTest
 class RemoveComparisonTest extends FixProcessorTest {

pkg/analysis_server/test/src/services/correction/fix/remove_const_test.dart

@@ -68,7 +68,7 @@ void f(int i) {
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
+              CompileTimeErrorCode.constConstructorParamTypeMismatch,
     );
   }
 
@@ -175,7 +175,7 @@ var v = [const A(), B()];
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.NON_CONSTANT_LIST_ELEMENT,
+              CompileTimeErrorCode.nonConstantListElement,
     );
   }
 
@@ -203,7 +203,7 @@ Object f() {
           (error) =>
               error.offset == parsedTestCode.positions[0].offset &&
               error.diagnosticCode ==
-                  CompileTimeErrorCode.NON_CONSTANT_LIST_ELEMENT,
+                  CompileTimeErrorCode.nonConstantListElement,
     );
     await assertHasFix(
       r'''
@@ -219,7 +219,7 @@ Object f() {
           (error) =>
               error.offset == parsedTestCode.positions[1].offset &&
               error.diagnosticCode ==
-                  CompileTimeErrorCode.NON_CONSTANT_LIST_ELEMENT,
+                  CompileTimeErrorCode.nonConstantListElement,
     );
   }
 
@@ -247,7 +247,7 @@ Object f() {
           (error) =>
               error.offset == parsedTestCode.position.offset &&
               error.diagnosticCode ==
-                  CompileTimeErrorCode.NON_CONSTANT_LIST_ELEMENT,
+                  CompileTimeErrorCode.nonConstantListElement,
     );
   }
 
@@ -273,7 +273,7 @@ final x = [const A(), A.nonConst()];
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.NON_CONSTANT_LIST_ELEMENT,
+              CompileTimeErrorCode.nonConstantListElement,
     );
   }
 }
@@ -428,8 +428,7 @@ var v = {1: const A(), 2: B()};
       // TODO(FMorschel): CONST_WITH_NON_CONST should not be probably triggered
       errorFilter:
           (error) =>
-              error.diagnosticCode ==
-              CompileTimeErrorCode.NON_CONSTANT_MAP_VALUE,
+              error.diagnosticCode == CompileTimeErrorCode.nonConstantMapValue,
     );
   }
 
@@ -452,8 +451,7 @@ final v = {1: const A(), 2: A.nonConst()};
       // TODO(FMorschel): CONST_WITH_NON_CONST should not be probably triggered
       errorFilter:
           (error) =>
-              error.diagnosticCode ==
-              CompileTimeErrorCode.NON_CONSTANT_MAP_VALUE,
+              error.diagnosticCode == CompileTimeErrorCode.nonConstantMapValue,
     );
   }
 }
@@ -518,7 +516,7 @@ var v = {const A(), B()};
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.NON_CONSTANT_SET_ELEMENT,
+              CompileTimeErrorCode.nonConstantSetElement,
     );
   }
 
@@ -542,7 +540,7 @@ final v = {const A(), A.nonConst()};
       errorFilter:
           (error) =>
               error.diagnosticCode ==
-              CompileTimeErrorCode.NON_CONSTANT_SET_ELEMENT,
+              CompileTimeErrorCode.nonConstantSetElement,
     );
   }
 }
@@ -713,7 +711,7 @@ class B {
 var x = B(a1: A(), b: const [0], a2: A());
 ''',
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.CONST_WITH_NON_CONST &&
+        return e.diagnosticCode == CompileTimeErrorCode.constWithNonConst &&
             e.offset == testCode.indexOf('A()');
       },
     );
@@ -753,7 +751,7 @@ class A {}
 var x = [A(), if (true) const [0] else const [1]];
 ''',
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.CONST_WITH_NON_CONST;
+        return e.diagnosticCode == CompileTimeErrorCode.constWithNonConst;
       },
     );
   }
@@ -779,7 +777,7 @@ class B {
 var x = [A(), const B(), const B(), A()];
 ''',
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.CONST_WITH_NON_CONST &&
+        return e.diagnosticCode == CompileTimeErrorCode.constWithNonConst &&
             e.offset == testCode.indexOf('A()');
       },
     );
@@ -798,7 +796,7 @@ class A {}
 var x = [A(), const [0], const [1]];
 ''',
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.CONST_WITH_NON_CONST;
+        return e.diagnosticCode == CompileTimeErrorCode.constWithNonConst;
       },
     );
   }
@@ -817,7 +815,7 @@ class A {}
 var x = [A(), ...const [0], ...const [1]];
 ''',
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.CONST_WITH_NON_CONST;
+        return e.diagnosticCode == CompileTimeErrorCode.constWithNonConst;
       },
     );
   }
@@ -835,7 +833,7 @@ class A {}
 var x = {0: A(), ...const {1: 2}, ...const {3: 4}};
 ''',
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.CONST_WITH_NON_CONST;
+        return e.diagnosticCode == CompileTimeErrorCode.constWithNonConst;
       },
     );
   }
@@ -853,7 +851,7 @@ class A {}
 var x = {A(), ...const {0}, ...const {1}};
 ''',
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.CONST_WITH_NON_CONST;
+        return e.diagnosticCode == CompileTimeErrorCode.constWithNonConst;
       },
     );
   }
@@ -871,7 +869,7 @@ class A {}
 final x = A(), y = const [0], z = A();
 ''',
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.CONST_WITH_NON_CONST &&
+        return e.diagnosticCode == CompileTimeErrorCode.constWithNonConst &&
             e.offset == testCode.lastIndexOf('A()');
       },
     );
@@ -890,7 +888,7 @@ class A {}
 final Object x = A(), y = const [0];
 ''',
       errorFilter: (e) {
-        return e.diagnosticCode == CompileTimeErrorCode.CONST_WITH_NON_CONST;
+        return e.diagnosticCode == CompileTimeErrorCode.constWithNonConst;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/remove_extends_clause_test.dart

@@ -28,7 +28,7 @@ mixin class B extends A {}
 mixin class C extends A {}
 ''');
     await assertHasFixAllFix(
-      CompileTimeErrorCode.MIXIN_CLASS_DECLARATION_EXTENDS_NOT_OBJECT,
+      CompileTimeErrorCode.mixinClassDeclarationExtendsNotObject,
       '''
 class A {}
 mixin class B {}

pkg/analysis_server/test/src/services/correction/fix/remove_if_null_operator_test.dart

@@ -21,7 +21,7 @@ void main() {
 }
 
 bool _ignoreDeadCode(Diagnostic diagnostic) =>
-    diagnostic.diagnosticCode != WarningCode.DEAD_CODE;
+    diagnostic.diagnosticCode != WarningCode.deadCode;
 
 @reflectiveTest
 class DeadNullAwareAssignmentExpressionTest extends FixProcessorTest {

pkg/analysis_server/test/src/services/correction/fix/remove_lexeme_test.dart

@@ -36,16 +36,13 @@ augment abstract class A {}
 
 augment final class A {}
 ''');
-    await assertHasFixAllFix(
-      CompileTimeErrorCode.AUGMENTATION_MODIFIER_EXTRA,
-      '''
+    await assertHasFixAllFix(CompileTimeErrorCode.augmentationModifierExtra, '''
 part of 'a.dart';
 
 augment class A {}
 
 augment class A {}
-''',
-    );
+''');
   }
 }
 

pkg/analysis_server/test/src/services/correction/fix/remove_name_from_declaration_clause_test.dart

@@ -331,8 +331,7 @@ final class S extends Struct {}
 final class C {}
 ''',
       errorFilter:
-          (error) =>
-              error.diagnosticCode == FfiCode.SUBTYPE_OF_STRUCT_CLASS_IN_WITH,
+          (error) => error.diagnosticCode == FfiCode.subtypeOfStructClassInWith,
     );
   }
 }

pkg/analysis_server/test/src/services/correction/fix/remove_on_clause_test.dart

@@ -36,7 +36,7 @@ augment extension E on int { }
 augment extension E on num { }
 ''');
     await assertHasFixAllFix(
-      ParserErrorCode.EXTENSION_AUGMENTATION_HAS_ON_CLAUSE,
+      ParserErrorCode.extensionAugmentationHasOnClause,
       '''
 part of 'a.dart';
 

pkg/analysis_server/test/src/services/correction/fix/remove_unnecessary_cast_test.dart

@@ -57,7 +57,7 @@ void f(Object p, Object q) {
   }
 }
 ''');
-    await assertHasFixAllFix(WarningCode.UNNECESSARY_CAST, '''
+    await assertHasFixAllFix(WarningCode.unnecessaryCast, '''
 void f(Object p, Object q) {
   if (p is String) {
     var v = p;

pkg/analysis_server/test/src/services/correction/fix/remove_unnecessary_final_test.dart

@@ -54,7 +54,7 @@ class A {
   int v2;
 }
 ''');
-    await assertHasFixAllFix(WarningCode.UNNECESSARY_FINAL, '''
+    await assertHasFixAllFix(WarningCode.unnecessaryFinal, '''
 class A {
   A(this.v1, this.v2);
   int v1;

pkg/analysis_server/test/src/services/correction/fix/remove_unused_catch_clause_test.dart

@@ -31,7 +31,7 @@ void f() {
   }
 }
 ''');
-    await assertHasFixAllFix(WarningCode.UNUSED_CATCH_CLAUSE, '''
+    await assertHasFixAllFix(WarningCode.unusedCatchClause, '''
 void f() {
   try {
     throw 42;

pkg/analysis_server/test/src/services/correction/fix/remove_unused_catch_stack_test.dart

@@ -31,7 +31,7 @@ void f() {
   }
 }
 ''');
-    await assertHasFixAllFix(WarningCode.UNUSED_CATCH_STACK, '''
+    await assertHasFixAllFix(WarningCode.unusedCatchStack, '''
 void f() {
   try {
     throw 42;

pkg/analysis_server/test/src/services/correction/fix/remove_unused_element_test.dart

@@ -181,7 +181,7 @@ enum _MyEnum {A, B, C}
 ''',
       errorFilter:
           (diagnostic) =>
-              diagnostic.diagnosticCode == WarningCode.UNUSED_ELEMENT,
+              diagnostic.diagnosticCode == WarningCode.unusedElement,
     );
   }
 

pkg/analysis_server/test/src/services/correction/fix/remove_unused_import_test.dart

@@ -94,7 +94,7 @@ import 'dart:math';
 import 'dart:async';
 void f() {}
 ''');
-    await assertHasFixAllFix(WarningCode.UNUSED_IMPORT, '''
+    await assertHasFixAllFix(WarningCode.unusedImport, '''
 void f() {}
 ''');
   }
@@ -109,7 +109,7 @@ var tau = math.pi * 2;
 
 void f() {}
 ''');
-    await assertHasFixAllFix(WarningCode.UNUSED_IMPORT, '''
+    await assertHasFixAllFix(WarningCode.unusedImport, '''
 import 'dart:math' as math;
 
 var tau = math.pi * 2;
@@ -126,7 +126,7 @@ void f() {}
 import 'dart:math'; import 'dart:math'; import 'dart:math';
 void f() {}
 ''');
-    await assertHasFixAllFix(WarningCode.UNUSED_IMPORT, '''
+    await assertHasFixAllFix(WarningCode.unusedImport, '''
 
 void f() {}
 ''');
@@ -137,7 +137,7 @@ void f() {}
 import 'dart:math'; import 'dart:math'; import 'dart:math';
 void f() {}
 ''');
-    await assertHasFixAllFix(WarningCode.UNUSED_IMPORT, '''
+    await assertHasFixAllFix(WarningCode.unusedImport, '''
 import 'dart:math';
 void f() {}
 ''');
@@ -150,7 +150,7 @@ import 'dart:math';
 import 'dart:math';
 void f() {}
 ''');
-    await assertHasFixAllFix(WarningCode.UNUSED_IMPORT, '''
+    await assertHasFixAllFix(WarningCode.unusedImport, '''
 void f() {}
 ''');
   }
@@ -213,7 +213,7 @@ import 'dart:_internal';
 ''');
 
     await assertHasFix('''
-''', errorFilter: (e) => e.diagnosticCode == WarningCode.UNUSED_IMPORT);
+''', errorFilter: (e) => e.diagnosticCode == WarningCode.unusedImport);
   }
 
   Future<void> test_severalLines() async {

pkg/analysis_server/test/src/services/correction/fix/remove_unused_local_variable_test.dart

@@ -272,7 +272,7 @@ void f() {
       errorFilter:
           (e) =>
               e.diagnosticCode !=
-              CompileTimeErrorCode.REFERENCED_BEFORE_DECLARATION,
+              CompileTimeErrorCode.referencedBeforeDeclaration,
     );
   }
 }

pkg/analysis_server/test/src/services/correction/fix/remove_var_test.dart

@@ -75,7 +75,7 @@ typedef F = var Function();
 typedef F = Function();
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == ParserErrorCode.VAR_RETURN_TYPE;
+        return error.diagnosticCode == ParserErrorCode.varReturnType;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/replace_boolean_with_bool_test.dart

@@ -28,7 +28,7 @@ void f() {
   boolean w;
 }
 ''');
-    await assertHasFixAllFix(CompileTimeErrorCode.UNDEFINED_CLASS_BOOLEAN, '''
+    await assertHasFixAllFix(CompileTimeErrorCode.undefinedClassBoolean, '''
 void f() {
   bool v;
   bool w;

pkg/analysis_server/test/src/services/correction/fix/replace_return_type_future_test.dart

@@ -140,7 +140,7 @@ Future<List<int>> f() async {}
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.ILLEGAL_ASYNC_RETURN_TYPE;
+            CompileTimeErrorCode.illegalAsyncReturnType;
       },
     );
   }
@@ -166,7 +166,7 @@ al.Future<int> f() async {}
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.ILLEGAL_ASYNC_RETURN_TYPE;
+            CompileTimeErrorCode.illegalAsyncReturnType;
       },
     );
   }
@@ -196,7 +196,7 @@ Future<int> f() async {}
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.ILLEGAL_ASYNC_RETURN_TYPE;
+            CompileTimeErrorCode.illegalAsyncReturnType;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/replace_return_type_stream_test.dart

@@ -32,7 +32,7 @@ Stream<List<int>> f() async* {}
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.ILLEGAL_ASYNC_GENERATOR_RETURN_TYPE;
+            CompileTimeErrorCode.illegalAsyncGeneratorReturnType;
       },
     );
   }
@@ -58,7 +58,7 @@ al.Stream<int> f() async* {}
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.ILLEGAL_ASYNC_GENERATOR_RETURN_TYPE;
+            CompileTimeErrorCode.illegalAsyncGeneratorReturnType;
       },
     );
   }
@@ -75,7 +75,7 @@ Stream<int> f() async* {}
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.ILLEGAL_ASYNC_GENERATOR_RETURN_TYPE;
+            CompileTimeErrorCode.illegalAsyncGeneratorReturnType;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/replace_return_type_test.dart

@@ -93,7 +93,7 @@ void top() {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.RETURN_OF_INVALID_TYPE_FROM_FUNCTION;
+            CompileTimeErrorCode.returnOfInvalidTypeFromFunction;
       },
     );
   }
@@ -137,7 +137,7 @@ class B extends A {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.RETURN_OF_INVALID_TYPE_FROM_METHOD;
+            CompileTimeErrorCode.returnOfInvalidTypeFromMethod;
       },
     );
   }
@@ -215,7 +215,7 @@ num f() {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.RETURN_OF_INVALID_TYPE_FROM_FUNCTION;
+            CompileTimeErrorCode.returnOfInvalidTypeFromFunction;
       },
     );
   }
@@ -244,7 +244,7 @@ class A {
 ''',
       errorFilter: (error) {
         return error.diagnosticCode ==
-            CompileTimeErrorCode.RETURN_OF_INVALID_TYPE_FROM_METHOD;
+            CompileTimeErrorCode.returnOfInvalidTypeFromMethod;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/replace_var_with_dynamic_test.dart

@@ -33,7 +33,7 @@ class A {
 }
 ''',
       errorFilter: (error) {
-        return error.diagnosticCode == ParserErrorCode.VAR_AS_TYPE_NAME;
+        return error.diagnosticCode == ParserErrorCode.varAsTypeName;
       },
     );
   }

pkg/analysis_server/test/src/services/correction/fix/use_eq_eq_null_test.dart

@@ -28,7 +28,7 @@ void f(p, q) {
   q is Null;
 }
 ''');
-    await assertHasFixAllFix(WarningCode.TYPE_CHECK_IS_NULL, '''
+    await assertHasFixAllFix(WarningCode.typeCheckIsNull, '''
 void f(p, q) {
   p == null;
   q == null;

pkg/analysis_server/test/src/services/correction/fix/use_not_eq_null_test.dart

@@ -28,7 +28,7 @@ void f(p, q) {
   q is! Null;
 }
 ''');
-    await assertHasFixAllFix(WarningCode.TYPE_CHECK_IS_NOT_NULL, '''
+    await assertHasFixAllFix(WarningCode.typeCheckIsNotNull, '''
 void f(p, q) {
   p != null;
   q != null;

pkg/analysis_server_plugin/test/single_unit.dart

@@ -78,13 +78,13 @@ class SingleUnitTest with ResourceProviderMixin {
     var testUnit = result.unit;
 
     expect(result.diagnostics.where((d) {
-      return d.diagnosticCode != WarningCode.DEAD_CODE &&
-          d.diagnosticCode != WarningCode.UNUSED_CATCH_CLAUSE &&
-          d.diagnosticCode != WarningCode.UNUSED_CATCH_STACK &&
-          d.diagnosticCode != WarningCode.UNUSED_ELEMENT &&
-          d.diagnosticCode != WarningCode.UNUSED_FIELD &&
-          d.diagnosticCode != WarningCode.UNUSED_IMPORT &&
-          d.diagnosticCode != WarningCode.UNUSED_LOCAL_VARIABLE;
+      return d.diagnosticCode != WarningCode.deadCode &&
+          d.diagnosticCode != WarningCode.unusedCatchClause &&
+          d.diagnosticCode != WarningCode.unusedCatchStack &&
+          d.diagnosticCode != WarningCode.unusedElement &&
+          d.diagnosticCode != WarningCode.unusedField &&
+          d.diagnosticCode != WarningCode.unusedImport &&
+          d.diagnosticCode != WarningCode.unusedLocalVariable;
     }), isEmpty);
 
     findNode = FindNode(testCode, testUnit);

pkg/analyzer/lib/src/analysis_options/error/option_codes.g.dart

@@ -37,7 +37,7 @@ class AnalysisOptionsErrorCode extends DiagnosticCode {
   /// Object p2: the ending offset of the text in the file that contains the
   ///            error
   /// Object p3: the error message
-  static const AnalysisOptionsErrorCode INCLUDED_FILE_PARSE_ERROR =
+  static const AnalysisOptionsErrorCode includedFileParseError =
       AnalysisOptionsErrorCode(
         'INCLUDED_FILE_PARSE_ERROR',
         "{3} in {0}({1}..{2})",
@@ -47,7 +47,7 @@ class AnalysisOptionsErrorCode extends DiagnosticCode {
   ///
   /// Parameters:
   /// Object p0: the error message from the parse error
-  static const AnalysisOptionsErrorCode PARSE_ERROR = AnalysisOptionsErrorCode(
+  static const AnalysisOptionsErrorCode parseError = AnalysisOptionsErrorCode(
     'PARSE_ERROR',
     "{0}",
   );
@@ -78,7 +78,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   ///
   /// Parameters:
   /// Object p0: the option name
-  static const AnalysisOptionsWarningCode ANALYSIS_OPTION_DEPRECATED =
+  static const AnalysisOptionsWarningCode analysisOptionDeprecated =
       AnalysisOptionsWarningCode(
         'ANALYSIS_OPTION_DEPRECATED',
         "The option '{0}' is no longer supported.",
@@ -90,7 +90,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// Object p0: the option name
   /// Object p1: the replacement option name
   static const AnalysisOptionsWarningCode
-  ANALYSIS_OPTION_DEPRECATED_WITH_REPLACEMENT = AnalysisOptionsWarningCode(
+  analysisOptionDeprecatedWithReplacement = AnalysisOptionsWarningCode(
     'ANALYSIS_OPTION_DEPRECATED',
     "The option '{0}' is no longer supported.",
     correctionMessage: "Try using the new '{1}' option.",
@@ -101,7 +101,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   ///
   /// Parameters:
   /// String p0: the rule name
-  static const AnalysisOptionsWarningCode DEPRECATED_LINT =
+  static const AnalysisOptionsWarningCode deprecatedLint =
       AnalysisOptionsWarningCode(
         'DEPRECATED_LINT',
         "'{0}' is a deprecated lint rule and should not be used.",
@@ -113,7 +113,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the deprecated lint name
   /// String p1: the replacing rule name
-  static const AnalysisOptionsWarningCode DEPRECATED_LINT_WITH_REPLACEMENT =
+  static const AnalysisOptionsWarningCode deprecatedLintWithReplacement =
       AnalysisOptionsWarningCode(
         'DEPRECATED_LINT_WITH_REPLACEMENT',
         "'{0}' is deprecated and should be replaced by '{1}'.",
@@ -125,7 +125,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the rule name
   static const AnalysisOptionsWarningCode
-  DUPLICATE_RULE = AnalysisOptionsWarningCode(
+  duplicateRule = AnalysisOptionsWarningCode(
     'DUPLICATE_RULE',
     "The rule {0} is already specified and doesn't need to be specified again.",
     correctionMessage: "Try removing all but one specification of the rule.",
@@ -140,7 +140,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// Object p2: the ending offset of the text in the file that contains the
   ///            warning
   /// Object p3: the warning message
-  static const AnalysisOptionsWarningCode INCLUDED_FILE_WARNING =
+  static const AnalysisOptionsWarningCode includedFileWarning =
       AnalysisOptionsWarningCode(
         'INCLUDED_FILE_WARNING',
         "Warning in the included options file {0}({1}..{2}): {3}",
@@ -152,7 +152,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// Object p0: the URI of the file to be included
   /// Object p1: the path of the file containing the include directive
   /// Object p2: the path of the context being analyzed
-  static const AnalysisOptionsWarningCode INCLUDE_FILE_NOT_FOUND =
+  static const AnalysisOptionsWarningCode includeFileNotFound =
       AnalysisOptionsWarningCode(
         'INCLUDE_FILE_NOT_FOUND',
         "The include file '{0}' in '{1}' can't be found when analyzing '{2}'.",
@@ -163,7 +163,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the rule name
   /// String p1: the incompatible rule
-  static const AnalysisOptionsWarningCode INCOMPATIBLE_LINT =
+  static const AnalysisOptionsWarningCode incompatibleLint =
       AnalysisOptionsWarningCode(
         'INCOMPATIBLE_LINT',
         "The rule '{0}' is incompatible with the rule '{1}'.",
@@ -176,7 +176,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the option name
   /// String p1: the detail message
-  static const AnalysisOptionsWarningCode INVALID_OPTION =
+  static const AnalysisOptionsWarningCode invalidOption =
       AnalysisOptionsWarningCode(
         'INVALID_OPTION',
         "Invalid option specified for '{0}': {1}",
@@ -186,7 +186,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   ///
   /// Parameters:
   /// String p0: the section name
-  static const AnalysisOptionsWarningCode INVALID_SECTION_FORMAT =
+  static const AnalysisOptionsWarningCode invalidSectionFormat =
       AnalysisOptionsWarningCode(
         'INVALID_SECTION_FORMAT',
         "Invalid format for the '{0}' section.",
@@ -196,7 +196,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   ///
   /// Parameters:
   /// String p0: the name of the first plugin
-  static const AnalysisOptionsWarningCode MULTIPLE_PLUGINS =
+  static const AnalysisOptionsWarningCode multiplePlugins =
       AnalysisOptionsWarningCode(
         'MULTIPLE_PLUGINS',
         "Multiple plugins can't be enabled.",
@@ -208,7 +208,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// Parameters:
   /// Object p0: the URI of the file to be included
   /// Object p1: the path of the file containing the include directive
-  static const AnalysisOptionsWarningCode RECURSIVE_INCLUDE_FILE =
+  static const AnalysisOptionsWarningCode recursiveIncludeFile =
       AnalysisOptionsWarningCode(
         'RECURSIVE_INCLUDE_FILE',
         "The include file '{0}' in '{1}' includes itself recursively.",
@@ -221,7 +221,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the rule name
   /// String p1: the SDK version in which the lint was removed
-  static const AnalysisOptionsWarningCode REMOVED_LINT =
+  static const AnalysisOptionsWarningCode removedLint =
       AnalysisOptionsWarningCode(
         'REMOVED_LINT',
         "'{0}' was removed in Dart '{1}'",
@@ -234,7 +234,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// String p0: the rule name
   /// String p1: the SDK version in which the lint was removed
   /// String p2: the name of a replacing lint
-  static const AnalysisOptionsWarningCode REPLACED_LINT =
+  static const AnalysisOptionsWarningCode replacedLint =
       AnalysisOptionsWarningCode(
         'REPLACED_LINT',
         "'{0}' was replaced by '{2}' in Dart '{1}'.",
@@ -245,7 +245,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   ///
   /// Parameters:
   /// String p0: the rule name
-  static const AnalysisOptionsWarningCode UNDEFINED_LINT =
+  static const AnalysisOptionsWarningCode undefinedLint =
       AnalysisOptionsWarningCode(
         'UNDEFINED_LINT',
         "'{0}' is not a recognized lint rule.",
@@ -257,7 +257,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   ///
   /// Parameters:
   /// String p0: the unrecognized error code
-  static const AnalysisOptionsWarningCode UNRECOGNIZED_ERROR_CODE =
+  static const AnalysisOptionsWarningCode unrecognizedErrorCode =
       AnalysisOptionsWarningCode(
         'UNRECOGNIZED_ERROR_CODE',
         "'{0}' isn't a recognized error code.",
@@ -269,7 +269,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the plugin name
   /// String p1: the unsupported option key
-  static const AnalysisOptionsWarningCode UNSUPPORTED_OPTION_WITHOUT_VALUES =
+  static const AnalysisOptionsWarningCode unsupportedOptionWithoutValues =
       AnalysisOptionsWarningCode(
         'UNSUPPORTED_OPTION_WITHOUT_VALUES',
         "The option '{1}' isn't supported by '{0}'.",
@@ -283,7 +283,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// String p1: the unsupported option key
   /// String p2: the legal value
   static const AnalysisOptionsWarningCode
-  UNSUPPORTED_OPTION_WITH_LEGAL_VALUE = AnalysisOptionsWarningCode(
+  unsupportedOptionWithLegalValue = AnalysisOptionsWarningCode(
     'UNSUPPORTED_OPTION_WITH_LEGAL_VALUE',
     "The option '{1}' isn't supported by '{0}'. Try using the only supported "
         "option: '{2}'.",
@@ -296,7 +296,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// String p0: the section name
   /// String p1: the unsupported option key
   /// String p2: legal values
-  static const AnalysisOptionsWarningCode UNSUPPORTED_OPTION_WITH_LEGAL_VALUES =
+  static const AnalysisOptionsWarningCode unsupportedOptionWithLegalValues =
       AnalysisOptionsWarningCode(
         'UNSUPPORTED_OPTION_WITH_LEGAL_VALUES',
         "The option '{1}' isn't supported by '{0}'.",
@@ -310,7 +310,7 @@ class AnalysisOptionsWarningCode extends DiagnosticCode {
   /// String p0: the option name
   /// int p1: the unsupported value
   /// String p2: legal values
-  static const AnalysisOptionsWarningCode UNSUPPORTED_VALUE =
+  static const AnalysisOptionsWarningCode unsupportedValue =
       AnalysisOptionsWarningCode(
         'UNSUPPORTED_VALUE',
         "The value '{1}' isn't supported by '{0}'.",

pkg/analyzer/lib/src/analysis_options/options_file_validator.dart

@@ -62,7 +62,7 @@ List<Diagnostic> analyzeAnalysisOptions(
             source: initialSource,
             offset: initialIncludeSpan!.start.offset,
             length: initialIncludeSpan!.length,
-            diagnosticCode: AnalysisOptionsWarningCode.INCLUDED_FILE_WARNING,
+            diagnosticCode: AnalysisOptionsWarningCode.includedFileWarning,
             arguments: args,
           ),
         );
@@ -121,7 +121,7 @@ List<Diagnostic> analyzeAnalysisOptions(
             source: initialSource,
             offset: initialIncludeSpan!.start.offset,
             length: initialIncludeSpan!.length,
-            diagnosticCode: AnalysisOptionsWarningCode.RECURSIVE_INCLUDE_FILE,
+            diagnosticCode: AnalysisOptionsWarningCode.recursiveIncludeFile,
             arguments: [includeUri, source.fullName],
           ),
         );
@@ -133,7 +133,7 @@ List<Diagnostic> analyzeAnalysisOptions(
             source: initialSource,
             offset: initialIncludeSpan!.start.offset,
             length: initialIncludeSpan!.length,
-            diagnosticCode: AnalysisOptionsWarningCode.INCLUDE_FILE_NOT_FOUND,
+            diagnosticCode: AnalysisOptionsWarningCode.includeFileNotFound,
             arguments: [includeUri, source.fullName, contextRoot],
           ),
         );
@@ -146,7 +146,7 @@ List<Diagnostic> analyzeAnalysisOptions(
             source: initialSource,
             offset: initialIncludeSpan!.start.offset,
             length: initialIncludeSpan!.length,
-            diagnosticCode: AnalysisOptionsWarningCode.INCLUDED_FILE_WARNING,
+            diagnosticCode: AnalysisOptionsWarningCode.includedFileWarning,
             arguments: [
               includedSource,
               spanInChain.start.offset,
@@ -190,7 +190,7 @@ List<Diagnostic> analyzeAnalysisOptions(
             source: initialSource,
             offset: initialIncludeSpan!.start.offset,
             length: initialIncludeSpan!.length,
-            diagnosticCode: AnalysisOptionsErrorCode.INCLUDED_FILE_PARSE_ERROR,
+            diagnosticCode: AnalysisOptionsErrorCode.includedFileParseError,
             arguments: args,
           ),
         );
@@ -218,7 +218,7 @@ List<Diagnostic> analyzeAnalysisOptions(
         source: source,
         offset: span.start.offset,
         length: span.length,
-        diagnosticCode: AnalysisOptionsErrorCode.PARSE_ERROR,
+        diagnosticCode: AnalysisOptionsErrorCode.parseError,
         arguments: [e.message],
       ),
     );
@@ -354,7 +354,7 @@ class _CannotIgnoreOptionValidator extends OptionsValidator {
                 !_removedDiagnosticCodes.contains(upperCaseName)) {
               reporter.atSourceSpan(
                 unignorableNameNode.span,
-                AnalysisOptionsWarningCode.UNRECOGNIZED_ERROR_CODE,
+                AnalysisOptionsWarningCode.unrecognizedErrorCode,
                 arguments: [unignorableName],
               );
             } else if (listedNames.contains(upperCaseName)) {
@@ -366,7 +366,7 @@ class _CannotIgnoreOptionValidator extends OptionsValidator {
           } else {
             reporter.atSourceSpan(
               unignorableNameNode.span,
-              AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+              AnalysisOptionsWarningCode.invalidSectionFormat,
               arguments: [AnalysisOptionsFile.cannotIgnore],
             );
           }
@@ -374,7 +374,7 @@ class _CannotIgnoreOptionValidator extends OptionsValidator {
       } else if (unignorableNames != null) {
         reporter.atSourceSpan(
           unignorableNames.span,
-          AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+          AnalysisOptionsWarningCode.invalidSectionFormat,
           arguments: [AnalysisOptionsFile.cannotIgnore],
         );
       }
@@ -395,7 +395,7 @@ class _CodeStyleOptionsValidator extends OptionsValidator {
         } else {
           reporter.atSourceSpan(
             keyNode.span,
-            AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITHOUT_VALUES,
+            AnalysisOptionsWarningCode.unsupportedOptionWithoutValues,
             arguments: [AnalysisOptionsFile.codeStyle, keyNode.toString()],
           );
         }
@@ -403,13 +403,13 @@ class _CodeStyleOptionsValidator extends OptionsValidator {
     } else if (codeStyle is YamlScalar && codeStyle.value != null) {
       reporter.atSourceSpan(
         codeStyle.span,
-        AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+        AnalysisOptionsWarningCode.invalidSectionFormat,
         arguments: [AnalysisOptionsFile.codeStyle],
       );
     } else if (codeStyle is YamlList) {
       reporter.atSourceSpan(
         codeStyle.span,
-        AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+        AnalysisOptionsWarningCode.invalidSectionFormat,
         arguments: [AnalysisOptionsFile.codeStyle],
       );
     }
@@ -419,7 +419,7 @@ class _CodeStyleOptionsValidator extends OptionsValidator {
     if (format is! YamlScalar) {
       reporter.atSourceSpan(
         format.span,
-        AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+        AnalysisOptionsWarningCode.invalidSectionFormat,
         arguments: [AnalysisOptionsFile.format],
       );
       return;
@@ -428,7 +428,7 @@ class _CodeStyleOptionsValidator extends OptionsValidator {
     if (formatValue == null) {
       reporter.atSourceSpan(
         format.span,
-        AnalysisOptionsWarningCode.UNSUPPORTED_VALUE,
+        AnalysisOptionsWarningCode.unsupportedValue,
         arguments: [
           AnalysisOptionsFile.format,
           format.valueOrThrow,
@@ -471,7 +471,7 @@ class _EnableExperimentsValidator extends OptionsValidator {
           if (validationResult is UnrecognizedFlag) {
             reporter.atSourceSpan(
               span,
-              AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITHOUT_VALUES,
+              AnalysisOptionsWarningCode.unsupportedOptionWithoutValues,
               arguments: [
                 AnalysisOptionsFile.enableExperiment,
                 flags[flagIndex],
@@ -480,7 +480,7 @@ class _EnableExperimentsValidator extends OptionsValidator {
           } else {
             reporter.atSourceSpan(
               span,
-              AnalysisOptionsWarningCode.INVALID_OPTION,
+              AnalysisOptionsWarningCode.invalidOption,
               arguments: [
                 AnalysisOptionsFile.enableExperiment,
                 validationResult.message,
@@ -491,7 +491,7 @@ class _EnableExperimentsValidator extends OptionsValidator {
       } else if (experimentNames != null) {
         reporter.atSourceSpan(
           experimentNames.span,
-          AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+          AnalysisOptionsWarningCode.invalidSectionFormat,
           arguments: [AnalysisOptionsFile.enableExperiment],
         );
       }
@@ -502,13 +502,13 @@ class _EnableExperimentsValidator extends OptionsValidator {
 /// Builds error reports with value proposals.
 class _ErrorBuilder {
   static AnalysisOptionsWarningCode get noProposalCode =>
-      AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITHOUT_VALUES;
+      AnalysisOptionsWarningCode.unsupportedOptionWithoutValues;
 
   static AnalysisOptionsWarningCode get pluralProposalCode =>
-      AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITH_LEGAL_VALUES;
+      AnalysisOptionsWarningCode.unsupportedOptionWithLegalValues;
 
   static AnalysisOptionsWarningCode get singularProposalCode =>
-      AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITH_LEGAL_VALUE;
+      AnalysisOptionsWarningCode.unsupportedOptionWithLegalValue;
 
   final String proposal;
 
@@ -593,7 +593,7 @@ class _ErrorFilterOptionValidator extends OptionsValidator {
                 !_removedDiagnosticCodes.contains(value)) {
               reporter.atSourceSpan(
                 k.span,
-                AnalysisOptionsWarningCode.UNRECOGNIZED_ERROR_CODE,
+                AnalysisOptionsWarningCode.unrecognizedErrorCode,
                 arguments: [k.value.toString()],
               );
             }
@@ -603,7 +603,7 @@ class _ErrorFilterOptionValidator extends OptionsValidator {
             if (!legalValues.contains(value)) {
               reporter.atSourceSpan(
                 v.span,
-                AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITH_LEGAL_VALUES,
+                AnalysisOptionsWarningCode.unsupportedOptionWithLegalValues,
                 arguments: [
                   AnalysisOptionsFile.errors,
                   v.value.toString(),
@@ -614,7 +614,7 @@ class _ErrorFilterOptionValidator extends OptionsValidator {
           } else {
             reporter.atSourceSpan(
               v.span,
-              AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+              AnalysisOptionsWarningCode.invalidSectionFormat,
               arguments: [AnalysisOptionsFile.enableExperiment],
             );
           }
@@ -622,7 +622,7 @@ class _ErrorFilterOptionValidator extends OptionsValidator {
       } else if (filters != null) {
         reporter.atSourceSpan(
           filters.span,
-          AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+          AnalysisOptionsWarningCode.invalidSectionFormat,
           arguments: [AnalysisOptionsFile.enableExperiment],
         );
       }
@@ -649,7 +649,7 @@ class _FormatterOptionsValidator extends OptionsValidator {
         } else {
           reporter.atSourceSpan(
             keyNode.span,
-            AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITHOUT_VALUES,
+            AnalysisOptionsWarningCode.unsupportedOptionWithoutValues,
             arguments: [AnalysisOptionsFile.formatter, keyNode.toString()],
           );
         }
@@ -657,7 +657,7 @@ class _FormatterOptionsValidator extends OptionsValidator {
     } else if (formatter.value != null) {
       reporter.atSourceSpan(
         formatter.span,
-        AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+        AnalysisOptionsWarningCode.invalidSectionFormat,
         arguments: [AnalysisOptionsFile.formatter],
       );
     }
@@ -672,7 +672,7 @@ class _FormatterOptionsValidator extends OptionsValidator {
     if (value is! int || value <= 0) {
       reporter.atSourceSpan(
         valueNode.span,
-        AnalysisOptionsWarningCode.INVALID_OPTION,
+        AnalysisOptionsWarningCode.invalidOption,
         arguments: [
           keyNode.toString(),
           '"page_width" must be a positive integer.',
@@ -691,7 +691,7 @@ class _FormatterOptionsValidator extends OptionsValidator {
     if (!TrailingCommas.values.any((item) => item.name == value)) {
       reporter.atSourceSpan(
         valueNode.span,
-        AnalysisOptionsWarningCode.INVALID_OPTION,
+        AnalysisOptionsWarningCode.invalidOption,
         arguments: [
           keyNode.toString(),
           '"trailing_commas" must be "automate" or "preserve".',
@@ -732,7 +732,7 @@ class _LanguageOptionValidator extends OptionsValidator {
             if (!AnalysisOptionsFile.trueOrFalse.contains(value)) {
               reporter.atSourceSpan(
                 v.span,
-                AnalysisOptionsWarningCode.UNSUPPORTED_VALUE,
+                AnalysisOptionsWarningCode.unsupportedValue,
                 arguments: [
                   key!,
                   v.valueOrThrow,
@@ -745,13 +745,13 @@ class _LanguageOptionValidator extends OptionsValidator {
       } else if (language is YamlScalar && language.value != null) {
         reporter.atSourceSpan(
           language.span,
-          AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+          AnalysisOptionsWarningCode.invalidSectionFormat,
           arguments: [AnalysisOptionsFile.language],
         );
       } else if (language is YamlList) {
         reporter.atSourceSpan(
           language.span,
-          AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+          AnalysisOptionsWarningCode.invalidSectionFormat,
           arguments: [AnalysisOptionsFile.language],
         );
       }
@@ -780,7 +780,7 @@ class _LegacyPluginsOptionValidator extends OptionsValidator {
           _firstIncludedPluginName != plugins.value) {
         reporter.atSourceSpan(
           plugins.span,
-          AnalysisOptionsWarningCode.MULTIPLE_PLUGINS,
+          AnalysisOptionsWarningCode.multiplePlugins,
           arguments: [_firstIncludedPluginName],
         );
       }
@@ -792,7 +792,7 @@ class _LegacyPluginsOptionValidator extends OptionsValidator {
           if (plugin.value != _firstIncludedPluginName) {
             reporter.atSourceSpan(
               plugin.span,
-              AnalysisOptionsWarningCode.MULTIPLE_PLUGINS,
+              AnalysisOptionsWarningCode.multiplePlugins,
               arguments: [_firstIncludedPluginName],
             );
           }
@@ -812,7 +812,7 @@ class _LegacyPluginsOptionValidator extends OptionsValidator {
           } else if (plugin.value != firstPlugin) {
             reporter.atSourceSpan(
               plugin.span,
-              AnalysisOptionsWarningCode.MULTIPLE_PLUGINS,
+              AnalysisOptionsWarningCode.multiplePlugins,
               arguments: [firstPlugin],
             );
           }
@@ -826,7 +826,7 @@ class _LegacyPluginsOptionValidator extends OptionsValidator {
           if (plugin != null && plugin.value != _firstIncludedPluginName) {
             reporter.atSourceSpan(
               plugin.span,
-              AnalysisOptionsWarningCode.MULTIPLE_PLUGINS,
+              AnalysisOptionsWarningCode.multiplePlugins,
               arguments: [_firstIncludedPluginName],
             );
           }
@@ -846,7 +846,7 @@ class _LegacyPluginsOptionValidator extends OptionsValidator {
           } else if (plugin != null && plugin.value != firstPlugin) {
             reporter.atSourceSpan(
               plugin.span,
-              AnalysisOptionsWarningCode.MULTIPLE_PLUGINS,
+              AnalysisOptionsWarningCode.multiplePlugins,
               arguments: [firstPlugin],
             );
           }
@@ -898,7 +898,7 @@ class _OptionalChecksValueValidator extends OptionsValidator {
               if (!AnalysisOptionsFile.trueOrFalse.contains(value)) {
                 reporter.atSourceSpan(
                   v.span,
-                  AnalysisOptionsWarningCode.UNSUPPORTED_VALUE,
+                  AnalysisOptionsWarningCode.unsupportedValue,
                   arguments: [
                     key!,
                     v.valueOrThrow,
@@ -912,7 +912,7 @@ class _OptionalChecksValueValidator extends OptionsValidator {
       } else if (v != null) {
         reporter.atSourceSpan(
           v.span,
-          AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+          AnalysisOptionsWarningCode.invalidSectionFormat,
           arguments: [AnalysisOptionsFile.enableExperiment],
         );
       }
@@ -945,7 +945,7 @@ class _PluginsOptionsValidator extends OptionsValidator {
             default:
               reporter.atSourceSpan(
                 plugins.span,
-                AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+                AnalysisOptionsWarningCode.invalidSectionFormat,
                 arguments: ['${AnalysisOptionsFile.plugins}/$pluginName'],
               );
           }
@@ -953,14 +953,14 @@ class _PluginsOptionsValidator extends OptionsValidator {
       case YamlList():
         reporter.atSourceSpan(
           plugins.span,
-          AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+          AnalysisOptionsWarningCode.invalidSectionFormat,
           arguments: [AnalysisOptionsFile.plugins],
         );
       case YamlScalar(:var value):
         if (value != null) {
           reporter.atSourceSpan(
             plugins.span,
-            AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+            AnalysisOptionsWarningCode.invalidSectionFormat,
             arguments: [AnalysisOptionsFile.plugins],
           );
         }
@@ -1005,7 +1005,7 @@ class _StrongModeOptionValueValidator extends OptionsValidator {
       } else if (strongModeNode != null) {
         reporter.atSourceSpan(
           strongModeNode.span,
-          AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+          AnalysisOptionsWarningCode.invalidSectionFormat,
           arguments: [AnalysisOptionsFile.strongMode],
         );
       }
@@ -1024,7 +1024,7 @@ class _StrongModeOptionValueValidator extends OptionsValidator {
         } else if (key == AnalysisOptionsFile.declarationCasts) {
           reporter.atSourceSpan(
             v.span,
-            AnalysisOptionsWarningCode.UNSUPPORTED_VALUE,
+            AnalysisOptionsWarningCode.unsupportedValue,
             arguments: [
               AnalysisOptionsFile.strongMode,
               v.valueOrThrow,
@@ -1038,7 +1038,7 @@ class _StrongModeOptionValueValidator extends OptionsValidator {
             if (!AnalysisOptionsFile.trueOrFalse.contains(value)) {
               reporter.atSourceSpan(
                 v.span,
-                AnalysisOptionsWarningCode.UNSUPPORTED_VALUE,
+                AnalysisOptionsWarningCode.unsupportedValue,
                 arguments: [
                   key!,
                   v.valueOrThrow,
@@ -1071,8 +1071,8 @@ class _TopLevelOptionValidator extends OptionsValidator {
       _valueProposal = supportedOptions.quotedAndCommaSeparatedWithAnd,
       _warningCode =
           supportedOptions.length == 1
-              ? AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITH_LEGAL_VALUE
-              : AnalysisOptionsWarningCode.UNSUPPORTED_OPTION_WITH_LEGAL_VALUES;
+              ? AnalysisOptionsWarningCode.unsupportedOptionWithLegalValue
+              : AnalysisOptionsWarningCode.unsupportedOptionWithLegalValues;
 
   @override
   void validate(DiagnosticReporter reporter, YamlMap options) {
@@ -1083,7 +1083,7 @@ class _TopLevelOptionValidator extends OptionsValidator {
     if (node is! YamlMap) {
       reporter.atSourceSpan(
         node.span,
-        AnalysisOptionsWarningCode.INVALID_SECTION_FORMAT,
+        AnalysisOptionsWarningCode.invalidSectionFormat,
         arguments: [AnalysisOptionsFile.cannotIgnore],
       );
       return;

pkg/analyzer/lib/src/dart/analysis/driver.dart

@@ -1975,7 +1975,7 @@ class AnalysisDriver {
           source: file.source,
           offset: 0,
           length: 0,
-          diagnosticCode: CompileTimeErrorCode.MISSING_DART_LIBRARY,
+          diagnosticCode: CompileTimeErrorCode.missingDartLibrary,
           arguments: [missingUri],
         ),
       ],

pkg/analyzer/lib/src/dart/analysis/library_analyzer.dart

@@ -282,7 +282,7 @@ class LibraryAnalyzer {
             if (shouldReport) {
               libraryUnitAnalysis.diagnosticReporter.atNode(
                 directive.uri,
-                CompileTimeErrorCode.INCONSISTENT_LANGUAGE_VERSION_OVERRIDE,
+                CompileTimeErrorCode.inconsistentLanguageVersionOverride,
               );
             }
           }
@@ -618,20 +618,20 @@ class LibraryAnalyzer {
 
     for (var errorCode in errorCodes) {
       if (const {
-        CompileTimeErrorCode.AMBIGUOUS_IMPORT,
-        CompileTimeErrorCode.CONST_WITH_NON_TYPE,
-        CompileTimeErrorCode.EXTENDS_NON_CLASS,
-        CompileTimeErrorCode.IMPLEMENTS_NON_CLASS,
-        CompileTimeErrorCode.MIXIN_OF_NON_CLASS,
-        CompileTimeErrorCode.NEW_WITH_NON_TYPE,
-        CompileTimeErrorCode.NOT_A_TYPE,
-        CompileTimeErrorCode.PREFIX_IDENTIFIER_NOT_FOLLOWED_BY_DOT,
-        CompileTimeErrorCode.UNDEFINED_ANNOTATION,
-        CompileTimeErrorCode.UNDEFINED_CLASS,
-        CompileTimeErrorCode.UNDEFINED_FUNCTION,
-        CompileTimeErrorCode.UNDEFINED_IDENTIFIER,
-        CompileTimeErrorCode.UNDEFINED_PREFIXED_NAME,
-        WarningCode.DEPRECATED_EXPORT_USE,
+        CompileTimeErrorCode.ambiguousImport,
+        CompileTimeErrorCode.constWithNonType,
+        CompileTimeErrorCode.extendsNonClass,
+        CompileTimeErrorCode.implementsNonClass,
+        CompileTimeErrorCode.mixinOfNonClass,
+        CompileTimeErrorCode.newWithNonType,
+        CompileTimeErrorCode.notAType,
+        CompileTimeErrorCode.prefixIdentifierNotFollowedByDot,
+        CompileTimeErrorCode.undefinedAnnotation,
+        CompileTimeErrorCode.undefinedClass,
+        CompileTimeErrorCode.undefinedFunction,
+        CompileTimeErrorCode.undefinedIdentifier,
+        CompileTimeErrorCode.undefinedPrefixedName,
+        WarningCode.deprecatedExportUse,
       }.contains(errorCode)) {
         return true;
       }
@@ -696,13 +696,13 @@ class LibraryAnalyzer {
       if (selectedUriStr.startsWith('dart-ext:')) {
         diagnosticReporter.atNode(
           directive.uri,
-          CompileTimeErrorCode.USE_OF_NATIVE_EXTENSION,
+          CompileTimeErrorCode.useOfNativeExtension,
         );
       } else if (state.importedSource == null) {
         var errorCode =
             state.isDocImport
-                ? WarningCode.URI_DOES_NOT_EXIST_IN_DOC_IMPORT
-                : CompileTimeErrorCode.URI_DOES_NOT_EXIST;
+                ? WarningCode.uriDoesNotExistInDocImport
+                : CompileTimeErrorCode.uriDoesNotExist;
         diagnosticReporter.atNode(
           directive.uri,
           errorCode,
@@ -711,10 +711,10 @@ class LibraryAnalyzer {
       } else if (state is LibraryImportWithFile && !state.importedFile.exists) {
         var errorCode =
             state.isDocImport
-                ? WarningCode.URI_DOES_NOT_EXIST_IN_DOC_IMPORT
+                ? WarningCode.uriDoesNotExistInDocImport
                 : state.importedSource.isGenerated
-                ? CompileTimeErrorCode.URI_HAS_NOT_BEEN_GENERATED
-                : CompileTimeErrorCode.URI_DOES_NOT_EXIST;
+                ? CompileTimeErrorCode.uriHasNotBeenGenerated
+                : CompileTimeErrorCode.uriDoesNotExist;
         diagnosticReporter.atNode(
           directive.uri,
           errorCode,
@@ -723,20 +723,20 @@ class LibraryAnalyzer {
       } else if (state.importedLibrarySource == null) {
         diagnosticReporter.atNode(
           directive.uri,
-          CompileTimeErrorCode.IMPORT_OF_NON_LIBRARY,
+          CompileTimeErrorCode.importOfNonLibrary,
           arguments: [selectedUriStr],
         );
       }
     } else if (state is LibraryImportWithUriStr) {
       diagnosticReporter.atNode(
         directive.uri,
-        CompileTimeErrorCode.INVALID_URI,
+        CompileTimeErrorCode.invalidUri,
         arguments: [state.selectedUri.relativeUriStr],
       );
     } else {
       diagnosticReporter.atNode(
         directive.uri,
-        CompileTimeErrorCode.URI_WITH_INTERPOLATION,
+        CompileTimeErrorCode.uriWithInterpolation,
       );
     }
   }
@@ -920,19 +920,19 @@ class LibraryAnalyzer {
       if (selectedUriStr.startsWith('dart-ext:')) {
         diagnosticReporter.atNode(
           directive.uri,
-          CompileTimeErrorCode.USE_OF_NATIVE_EXTENSION,
+          CompileTimeErrorCode.useOfNativeExtension,
         );
       } else if (state.exportedSource == null) {
         diagnosticReporter.atNode(
           directive.uri,
-          CompileTimeErrorCode.URI_DOES_NOT_EXIST,
+          CompileTimeErrorCode.uriDoesNotExist,
           arguments: [selectedUriStr],
         );
       } else if (state is LibraryExportWithFile && !state.exportedFile.exists) {
         var errorCode =
             isGeneratedSource(state.exportedSource)
-                ? CompileTimeErrorCode.URI_HAS_NOT_BEEN_GENERATED
-                : CompileTimeErrorCode.URI_DOES_NOT_EXIST;
+                ? CompileTimeErrorCode.uriHasNotBeenGenerated
+                : CompileTimeErrorCode.uriDoesNotExist;
         diagnosticReporter.atNode(
           directive.uri,
           errorCode,
@@ -941,20 +941,20 @@ class LibraryAnalyzer {
       } else if (state.exportedLibrarySource == null) {
         diagnosticReporter.atNode(
           directive.uri,
-          CompileTimeErrorCode.EXPORT_OF_NON_LIBRARY,
+          CompileTimeErrorCode.exportOfNonLibrary,
           arguments: [selectedUriStr],
         );
       }
     } else if (state is LibraryExportWithUriStr) {
       diagnosticReporter.atNode(
         directive.uri,
-        CompileTimeErrorCode.INVALID_URI,
+        CompileTimeErrorCode.invalidUri,
         arguments: [state.selectedUri.relativeUriStr],
       );
     } else {
       diagnosticReporter.atNode(
         directive.uri,
-        CompileTimeErrorCode.URI_WITH_INTERPOLATION,
+        CompileTimeErrorCode.uriWithInterpolation,
       );
     }
   }
@@ -1001,13 +1001,13 @@ class LibraryAnalyzer {
     }
 
     if (partState is! PartIncludeWithUriStr) {
-      reportOnDirectiveUri(CompileTimeErrorCode.URI_WITH_INTERPOLATION);
+      reportOnDirectiveUri(CompileTimeErrorCode.uriWithInterpolation);
       return;
     }
 
     if (partState is! PartIncludeWithUri) {
       reportOnDirectiveUri(
-        CompileTimeErrorCode.INVALID_URI,
+        CompileTimeErrorCode.invalidUri,
         arguments: [partState.selectedUri.relativeUriStr],
       );
       return;
@@ -1015,7 +1015,7 @@ class LibraryAnalyzer {
 
     if (partState is! PartIncludeWithFile) {
       reportOnDirectiveUri(
-        CompileTimeErrorCode.URI_DOES_NOT_EXIST,
+        CompileTimeErrorCode.uriDoesNotExist,
         arguments: [partState.selectedUri.relativeUriStr],
       );
       return;
@@ -1027,11 +1027,11 @@ class LibraryAnalyzer {
     if (includedKind is! PartFileKind) {
       DiagnosticCode diagnosticCode;
       if (includedFile.exists) {
-        diagnosticCode = CompileTimeErrorCode.PART_OF_NON_PART;
+        diagnosticCode = CompileTimeErrorCode.partOfNonPart;
       } else if (isGeneratedSource(includedFile.source)) {
-        diagnosticCode = CompileTimeErrorCode.URI_HAS_NOT_BEEN_GENERATED;
+        diagnosticCode = CompileTimeErrorCode.uriHasNotBeenGenerated;
       } else {
-        diagnosticCode = CompileTimeErrorCode.URI_DOES_NOT_EXIST;
+        diagnosticCode = CompileTimeErrorCode.uriDoesNotExist;
       }
       reportOnDirectiveUri(diagnosticCode, arguments: [includedFile.uriStr]);
       return;
@@ -1042,7 +1042,7 @@ class LibraryAnalyzer {
     //
     if (_libraryFiles.containsKey(includedFile)) {
       reportOnDirectiveUri(
-        CompileTimeErrorCode.DUPLICATE_PART,
+        CompileTimeErrorCode.duplicatePart,
         arguments: [includedFile.uri],
       );
       return;
@@ -1057,19 +1057,19 @@ class LibraryAnalyzer {
             var libraryName = _libraryElement.name;
             if (libraryName.isEmpty) {
               reportOnDirectiveUri(
-                CompileTimeErrorCode.PART_OF_UNNAMED_LIBRARY,
+                CompileTimeErrorCode.partOfUnnamedLibrary,
                 arguments: [name],
               );
             } else {
               reportOnDirectiveUri(
-                CompileTimeErrorCode.PART_OF_DIFFERENT_LIBRARY,
+                CompileTimeErrorCode.partOfDifferentLibrary,
                 arguments: [libraryName, name],
               );
             }
           }
         case PartOfUriFileKind():
           reportOnDirectiveUri(
-            CompileTimeErrorCode.PART_OF_DIFFERENT_LIBRARY,
+            CompileTimeErrorCode.partOfDifferentLibrary,
             arguments: [enclosingFile.file.uriStr, includedFile.uriStr],
           );
       }

pkg/analyzer/lib/src/dart/ast/ast.dart

@@ -7899,7 +7899,7 @@ sealed class ExpressionImpl extends CollectionElementImpl
 
     var constant = visitor.evaluateAndReportInvalidConstant(this);
     var isInvalidConstant = diagnosticListener.diagnostics.any(
-      (e) => e.diagnosticCode == CompileTimeErrorCode.INVALID_CONSTANT,
+      (e) => e.diagnosticCode == CompileTimeErrorCode.invalidConstant,
     );
     if (isInvalidConstant) {
       return null;

pkg/analyzer/lib/src/dart/constant/constant_verifier.dart

@@ -112,7 +112,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
       if (!element.isConst) {
         _diagnosticReporter.atNode(
           node,
-          CompileTimeErrorCode.NON_CONSTANT_ANNOTATION_CONSTRUCTOR,
+          CompileTimeErrorCode.nonConstantAnnotationConstructor,
         );
         return;
       }
@@ -121,7 +121,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
       if (argumentList == null) {
         _diagnosticReporter.atNode(
           node,
-          CompileTimeErrorCode.NO_ANNOTATION_CONSTRUCTOR_ARGUMENTS,
+          CompileTimeErrorCode.noAnnotationConstructorArguments,
         );
         return;
       }
@@ -139,7 +139,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
 
     var value = _evaluateAndReportError(
       expression,
-      CompileTimeErrorCode.CONSTANT_PATTERN_WITH_NON_CONSTANT_EXPRESSION,
+      CompileTimeErrorCode.constantPatternWithNonConstantExpression,
     );
     if (value is DartObjectImpl) {
       if (_currentLibrary.featureSet.isEnabled(Feature.patterns)) {
@@ -152,7 +152,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
             if (!_canBeEqual(constantType, matchedValueType)) {
               _diagnosticReporter.atNode(
                 node,
-                WarningCode.CONSTANT_PATTERN_NEVER_MATCHES_VALUE_TYPE,
+                WarningCode.constantPatternNeverMatchesValueType,
                 arguments: [matchedValueType, constantType],
               );
               return;
@@ -177,7 +177,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
           !element.isFactory) {
         _diagnosticReporter.atNode(
           node.returnType,
-          CompileTimeErrorCode.RECURSIVE_CONSTANT_CONSTRUCTOR,
+          CompileTimeErrorCode.recursiveConstantConstructor,
         );
       }
 
@@ -200,7 +200,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
     if (node.inConstantContext || node.inConstantExpression) {
       _checkForConstWithTypeParameters(
         node.constructorName.type,
-        CompileTimeErrorCode.CONST_WITH_TYPE_PARAMETERS_CONSTRUCTOR_TEAROFF,
+        CompileTimeErrorCode.constWithTypeParametersConstructorTearoff,
       );
     }
   }
@@ -252,7 +252,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
       for (var typeArgument in typeArguments.arguments) {
         _checkForConstWithTypeParameters(
           typeArgument,
-          CompileTimeErrorCode.CONST_WITH_TYPE_PARAMETERS_FUNCTION_TEAROFF,
+          CompileTimeErrorCode.constWithTypeParametersFunctionTearoff,
         );
       }
     }
@@ -267,7 +267,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
         (parent as Expression).inConstantContext) {
       _checkForConstWithTypeParameters(
         node,
-        CompileTimeErrorCode.CONST_WITH_TYPE_PARAMETERS,
+        CompileTimeErrorCode.constWithTypeParameters,
       );
     }
   }
@@ -280,7 +280,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
       var namedType = node.constructorName.type;
       _checkForConstWithTypeParameters(
         namedType,
-        CompileTimeErrorCode.CONST_WITH_TYPE_PARAMETERS,
+        CompileTimeErrorCode.constWithTypeParameters,
       );
 
       var constructor = node.constructorName.element;
@@ -300,7 +300,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
       var elementType = nodeType.typeArguments[0];
       var verifier = _ConstLiteralVerifier(
         this,
-        diagnosticCode: CompileTimeErrorCode.NON_CONSTANT_LIST_ELEMENT,
+        diagnosticCode: CompileTimeErrorCode.nonConstantListElement,
         listElementType: elementType,
       );
       for (var element in node.elements) {
@@ -334,7 +334,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
         var key = element.key;
         var keyValue = _evaluateAndReportError(
           key,
-          CompileTimeErrorCode.NON_CONSTANT_MAP_PATTERN_KEY,
+          CompileTimeErrorCode.nonConstantMapPatternKey,
         );
         if (keyValue is DartObjectImpl) {
           _mapPatternKeyValues?[key] = keyValue;
@@ -373,7 +373,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
       for (var field in node.fields) {
         _evaluateAndReportError(
           field,
-          CompileTimeErrorCode.NON_CONSTANT_RECORD_FIELD,
+          CompileTimeErrorCode.nonConstantRecordField,
         );
       }
     }
@@ -385,7 +385,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
 
     _evaluateAndReportError(
       node.operand,
-      CompileTimeErrorCode.NON_CONSTANT_RELATIONAL_PATTERN_EXPRESSION,
+      CompileTimeErrorCode.nonConstantRelationalPatternExpression,
     );
   }
 
@@ -399,7 +399,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
         var config = _SetVerifierConfig(elementType: elementType);
         var verifier = _ConstLiteralVerifier(
           this,
-          diagnosticCode: CompileTimeErrorCode.NON_CONSTANT_SET_ELEMENT,
+          diagnosticCode: CompileTimeErrorCode.nonConstantSetElement,
           setConfig: config,
         );
         for (CollectionElement element in node.elements) {
@@ -423,7 +423,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
         var config = _MapVerifierConfig(keyType: keyType, valueType: valueType);
         var verifier = _ConstLiteralVerifier(
           this,
-          diagnosticCode: CompileTimeErrorCode.NON_CONSTANT_MAP_ELEMENT,
+          diagnosticCode: CompileTimeErrorCode.nonConstantMapElement,
           mapConfig: config,
         );
         for (var entry in node.elements) {
@@ -514,7 +514,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
         if (node.isConst) {
           _reportError(
             result,
-            CompileTimeErrorCode.CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE,
+            CompileTimeErrorCode.constInitializedWithNonConstantValue,
           );
         } else {
           _reportError(result, null);
@@ -562,7 +562,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
   ///
   /// A generic function type is allowed to reference its own type parameter(s).
   ///
-  /// See [CompileTimeErrorCode.CONST_WITH_TYPE_PARAMETERS].
+  /// See [CompileTimeErrorCode.constWithTypeParameters].
   void _checkForConstWithTypeParameters(
     TypeAnnotation type,
     DiagnosticCode diagnosticCode, {
@@ -678,150 +678,133 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
     DiagnosticCode diagnosticCode = error.diagnosticCode;
     if (identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_EXTENSION_METHOD,
+          CompileTimeErrorCode.constEvalExtensionMethod,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_EXTENSION_TYPE_METHOD,
+          CompileTimeErrorCode.constEvalExtensionTypeMethod,
+        ) ||
+        identical(diagnosticCode, CompileTimeErrorCode.constEvalForElement) ||
+        identical(
+          diagnosticCode,
+          CompileTimeErrorCode.constEvalMethodInvocation,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_FOR_ELEMENT,
+          CompileTimeErrorCode.constEvalPrimitiveEquality,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_METHOD_INVOCATION,
+          CompileTimeErrorCode.constEvalPropertyAccess,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_PRIMITIVE_EQUALITY,
+          CompileTimeErrorCode.constEvalThrowsException,
+        ) ||
+        identical(diagnosticCode, CompileTimeErrorCode.constEvalThrowsIdbze) ||
+        identical(
+          diagnosticCode,
+          CompileTimeErrorCode.constEvalTypeBoolNumString,
+        ) ||
+        identical(diagnosticCode, CompileTimeErrorCode.constEvalTypeBool) ||
+        identical(diagnosticCode, CompileTimeErrorCode.constEvalTypeBoolInt) ||
+        identical(diagnosticCode, CompileTimeErrorCode.constEvalTypeInt) ||
+        identical(diagnosticCode, CompileTimeErrorCode.constEvalTypeNum) ||
+        identical(
+          diagnosticCode,
+          CompileTimeErrorCode.constEvalTypeNumString,
+        ) ||
+        identical(diagnosticCode, CompileTimeErrorCode.constEvalTypeString) ||
+        identical(
+          diagnosticCode,
+          CompileTimeErrorCode.recursiveCompileTimeConstant,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_PROPERTY_ACCESS,
+          CompileTimeErrorCode.constConstructorFieldTypeMismatch,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION,
+          CompileTimeErrorCode.constConstructorParamTypeMismatch,
+        ) ||
+        identical(diagnosticCode, CompileTimeErrorCode.constTypeParameter) ||
+        identical(
+          diagnosticCode,
+          CompileTimeErrorCode.constWithTypeParametersFunctionTearoff,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_THROWS_IDBZE,
+          CompileTimeErrorCode.constSpreadExpectedListOrSet,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_TYPE_BOOL_NUM_STRING,
+          CompileTimeErrorCode.constSpreadExpectedMap,
         ) ||
-        identical(diagnosticCode, CompileTimeErrorCode.CONST_EVAL_TYPE_BOOL) ||
+        identical(diagnosticCode, CompileTimeErrorCode.expressionInMap) ||
+        identical(diagnosticCode, CompileTimeErrorCode.variableTypeMismatch) ||
+        identical(diagnosticCode, CompileTimeErrorCode.nonBoolCondition) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_TYPE_BOOL_INT,
-        ) ||
-        identical(diagnosticCode, CompileTimeErrorCode.CONST_EVAL_TYPE_INT) ||
-        identical(diagnosticCode, CompileTimeErrorCode.CONST_EVAL_TYPE_NUM) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_TYPE_NUM_STRING,
+          CompileTimeErrorCode.nonConstantDefaultValueFromDeferredLibrary,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_EVAL_TYPE_STRING,
+          CompileTimeErrorCode.nonConstantMapKeyFromDeferredLibrary,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.RECURSIVE_COMPILE_TIME_CONSTANT,
+          CompileTimeErrorCode.nonConstantMapValueFromDeferredLibrary,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_CONSTRUCTOR_FIELD_TYPE_MISMATCH,
+          CompileTimeErrorCode.setElementFromDeferredLibrary,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
-        ) ||
-        identical(diagnosticCode, CompileTimeErrorCode.CONST_TYPE_PARAMETER) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode.CONST_WITH_TYPE_PARAMETERS_FUNCTION_TEAROFF,
+          CompileTimeErrorCode.spreadExpressionFromDeferredLibrary,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.CONST_SPREAD_EXPECTED_LIST_OR_SET,
-        ) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode.CONST_SPREAD_EXPECTED_MAP,
-        ) ||
-        identical(diagnosticCode, CompileTimeErrorCode.EXPRESSION_IN_MAP) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode.VARIABLE_TYPE_MISMATCH,
-        ) ||
-        identical(diagnosticCode, CompileTimeErrorCode.NON_BOOL_CONDITION) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode.NON_CONSTANT_DEFAULT_VALUE_FROM_DEFERRED_LIBRARY,
-        ) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode.NON_CONSTANT_MAP_KEY_FROM_DEFERRED_LIBRARY,
-        ) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode.NON_CONSTANT_MAP_VALUE_FROM_DEFERRED_LIBRARY,
-        ) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode.SET_ELEMENT_FROM_DEFERRED_LIBRARY,
-        ) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode.SPREAD_EXPRESSION_FROM_DEFERRED_LIBRARY,
+          CompileTimeErrorCode.nonConstantCaseExpressionFromDeferredLibrary,
         ) ||
         identical(
           diagnosticCode,
           CompileTimeErrorCode
-              .NON_CONSTANT_CASE_EXPRESSION_FROM_DEFERRED_LIBRARY,
+              .invalidAnnotationConstantValueFromDeferredLibrary,
+        ) ||
+        identical(
+          diagnosticCode,
+          CompileTimeErrorCode.ifElementConditionFromDeferredLibrary,
         ) ||
         identical(
           diagnosticCode,
           CompileTimeErrorCode
-              .INVALID_ANNOTATION_CONSTANT_VALUE_FROM_DEFERRED_LIBRARY,
+              .constInitializedWithNonConstantValueFromDeferredLibrary,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.IF_ELEMENT_CONDITION_FROM_DEFERRED_LIBRARY,
+          CompileTimeErrorCode.nonConstantListElementFromDeferredLibrary,
+        ) ||
+        identical(
+          diagnosticCode,
+          CompileTimeErrorCode.nonConstantRecordFieldFromDeferredLibrary,
         ) ||
         identical(
           diagnosticCode,
           CompileTimeErrorCode
-              .CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE_FROM_DEFERRED_LIBRARY,
+              .constInitializedWithNonConstantValueFromDeferredLibrary,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.NON_CONSTANT_LIST_ELEMENT_FROM_DEFERRED_LIBRARY,
+          CompileTimeErrorCode.patternConstantFromDeferredLibrary,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode.NON_CONSTANT_RECORD_FIELD_FROM_DEFERRED_LIBRARY,
+          CompileTimeErrorCode.wrongNumberOfTypeArgumentsFunction,
         ) ||
         identical(
           diagnosticCode,
-          CompileTimeErrorCode
-              .CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE_FROM_DEFERRED_LIBRARY,
-        ) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode.PATTERN_CONSTANT_FROM_DEFERRED_LIBRARY,
-        ) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_FUNCTION,
-        ) ||
-        identical(
-          diagnosticCode,
-          CompileTimeErrorCode
-              .WRONG_NUMBER_OF_TYPE_ARGUMENTS_ANONYMOUS_FUNCTION,
+          CompileTimeErrorCode.wrongNumberOfTypeArgumentsAnonymousFunction,
         )) {
       _diagnosticReporter.reportError(
         Diagnostic.tmp(
@@ -855,7 +838,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
     for (var notConst in notPotentiallyConstants) {
       _diagnosticReporter.atNode(
         notConst,
-        CompileTimeErrorCode.INVALID_CONSTANT,
+        CompileTimeErrorCode.invalidConstant,
       );
     }
   }
@@ -881,7 +864,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
           argument is NamedExpression ? argument.expression : argument;
       _evaluateAndReportError(
         realArgument,
-        CompileTimeErrorCode.CONST_WITH_NON_CONSTANT_ARGUMENT,
+        CompileTimeErrorCode.constWithNonConstantArgument,
       );
     }
   }
@@ -965,7 +948,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
         } else {
           result = _evaluateAndReportError(
             defaultValue,
-            CompileTimeErrorCode.NON_CONSTANT_DEFAULT_VALUE,
+            CompileTimeErrorCode.nonConstantDefaultValue,
           );
         }
         var element = parameter.declaredFragment!.element;
@@ -1012,7 +995,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
               _diagnosticReporter.atToken(
                 constKeyword,
                 CompileTimeErrorCode
-                    .CONST_CONSTRUCTOR_WITH_FIELD_INITIALIZED_BY_NON_CONST,
+                    .constConstructorWithFieldInitializedByNonConst,
                 arguments: [variableDeclaration.name.lexeme],
               );
             }
@@ -1091,7 +1074,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
         };
         _diagnosticReporter.atToken(
           errorToken,
-          WarningCode.UNREACHABLE_SWITCH_CASE,
+          WarningCode.unreachableSwitchCase,
         );
       }
       if (nonExhaustiveness != null) {
@@ -1118,8 +1101,8 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
           var diagnostic = _diagnosticReporter.atToken(
             switchKeyword,
             isSwitchExpression
-                ? CompileTimeErrorCode.NON_EXHAUSTIVE_SWITCH_EXPRESSION
-                : CompileTimeErrorCode.NON_EXHAUSTIVE_SWITCH_STATEMENT,
+                ? CompileTimeErrorCode.nonExhaustiveSwitchExpression
+                : CompileTimeErrorCode.nonExhaustiveSwitchStatement,
             arguments: [
               scrutineeType,
               errorBuffer.toString(),
@@ -1135,7 +1118,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
           // Default node is unreachable
           _diagnosticReporter.atToken(
             defaultNode.keyword,
-            WarningCode.UNREACHABLE_SWITCH_DEFAULT,
+            WarningCode.unreachableSwitchDefault,
           );
         }
       }
@@ -1166,7 +1149,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
     void validateExpression(Expression expression) {
       var expressionValue = _evaluateAndReportError(
         expression,
-        CompileTimeErrorCode.NON_CONSTANT_CASE_EXPRESSION,
+        CompileTimeErrorCode.nonConstantCaseExpression,
       );
       if (expressionValue is! DartObjectImpl) {
         return;
@@ -1178,7 +1161,7 @@ class ConstantVerifier extends RecursiveAstVisitor<void> {
         if (!expressionValue.hasPrimitiveEquality(featureSet)) {
           _diagnosticReporter.atNode(
             expression,
-            CompileTimeErrorCode.CASE_EXPRESSION_TYPE_IMPLEMENTS_EQUALS,
+            CompileTimeErrorCode.caseExpressionTypeImplementsEquals,
             arguments: [expressionType],
           );
         }
@@ -1253,7 +1236,7 @@ class _ConstLiteralVerifier {
     } else if (element is ForElement) {
       verifier._diagnosticReporter.atNode(
         element,
-        CompileTimeErrorCode.CONST_EVAL_FOR_ELEMENT,
+        CompileTimeErrorCode.constEvalForElement,
       );
       return false;
     } else if (element is IfElement) {
@@ -1359,9 +1342,9 @@ class _ConstLiteralVerifier {
     for (var notConst in notPotentiallyConstants) {
       CompileTimeErrorCode errorCode;
       if (listElementType != null) {
-        errorCode = CompileTimeErrorCode.NON_CONSTANT_LIST_ELEMENT;
+        errorCode = CompileTimeErrorCode.nonConstantListElement;
       } else if (mapConfig != null) {
-        errorCode = CompileTimeErrorCode.NON_CONSTANT_MAP_ELEMENT;
+        errorCode = CompileTimeErrorCode.nonConstantMapElement;
         for (
           AstNode? parent = notConst;
           parent != null;
@@ -1369,15 +1352,15 @@ class _ConstLiteralVerifier {
         ) {
           if (parent is MapLiteralEntry) {
             if (parent.key == notConst) {
-              errorCode = CompileTimeErrorCode.NON_CONSTANT_MAP_KEY;
+              errorCode = CompileTimeErrorCode.nonConstantMapKey;
             } else {
-              errorCode = CompileTimeErrorCode.NON_CONSTANT_MAP_VALUE;
+              errorCode = CompileTimeErrorCode.nonConstantMapValue;
             }
             break;
           }
         }
       } else if (setConfig != null) {
-        errorCode = CompileTimeErrorCode.NON_CONSTANT_SET_ELEMENT;
+        errorCode = CompileTimeErrorCode.nonConstantSetElement;
       } else {
         throw UnimplementedError();
       }
@@ -1399,13 +1382,13 @@ class _ConstLiteralVerifier {
       )) {
         verifier._diagnosticReporter.atNode(
           expression,
-          CompileTimeErrorCode.LIST_ELEMENT_TYPE_NOT_ASSIGNABLE_NULLABILITY,
+          CompileTimeErrorCode.listElementTypeNotAssignableNullability,
           arguments: [value.type, listElementType],
         );
       } else {
         verifier._diagnosticReporter.atNode(
           expression,
-          CompileTimeErrorCode.LIST_ELEMENT_TYPE_NOT_ASSIGNABLE,
+          CompileTimeErrorCode.listElementTypeNotAssignable,
           arguments: [value.type, listElementType],
         );
       }
@@ -1429,7 +1412,7 @@ class _ConstLiteralVerifier {
       // _addElementsTo methods..
       verifier._diagnosticReporter.atNode(
         element.expression,
-        CompileTimeErrorCode.CONST_SPREAD_EXPECTED_LIST_OR_SET,
+        CompileTimeErrorCode.constSpreadExpectedListOrSet,
       );
       return false;
     }
@@ -1444,7 +1427,7 @@ class _ConstLiteralVerifier {
       if (!listValue.every((e) => e.hasPrimitiveEquality(featureSet))) {
         verifier._diagnosticReporter.atNode(
           element,
-          CompileTimeErrorCode.CONST_SET_ELEMENT_NOT_PRIMITIVE_EQUALITY,
+          CompileTimeErrorCode.constSetElementNotPrimitiveEquality,
           arguments: [value.type],
         );
         return false;
@@ -1476,11 +1459,11 @@ class _ConstLiteralVerifier {
 
     var keyValue = verifier._evaluateAndReportError(
       keyExpression,
-      CompileTimeErrorCode.NON_CONSTANT_MAP_KEY,
+      CompileTimeErrorCode.nonConstantMapKey,
     );
     var valueValue = verifier._evaluateAndReportError(
       valueExpression,
-      CompileTimeErrorCode.NON_CONSTANT_MAP_VALUE,
+      CompileTimeErrorCode.nonConstantMapValue,
     );
 
     if (keyValue is DartObjectImpl) {
@@ -1498,13 +1481,13 @@ class _ConstLiteralVerifier {
             )) {
           verifier._diagnosticReporter.atNode(
             keyExpression,
-            CompileTimeErrorCode.MAP_KEY_TYPE_NOT_ASSIGNABLE_NULLABILITY,
+            CompileTimeErrorCode.mapKeyTypeNotAssignableNullability,
             arguments: [keyType, expectedKeyType],
           );
         } else {
           verifier._diagnosticReporter.atNode(
             keyExpression,
-            CompileTimeErrorCode.MAP_KEY_TYPE_NOT_ASSIGNABLE,
+            CompileTimeErrorCode.mapKeyTypeNotAssignable,
             arguments: [keyType, expectedKeyType],
           );
         }
@@ -1514,7 +1497,7 @@ class _ConstLiteralVerifier {
       if (!keyValue.hasPrimitiveEquality(featureSet)) {
         verifier._diagnosticReporter.atNode(
           keyExpression,
-          CompileTimeErrorCode.CONST_MAP_KEY_NOT_PRIMITIVE_EQUALITY,
+          CompileTimeErrorCode.constMapKeyNotPrimitiveEquality,
           arguments: [keyType],
         );
       }
@@ -1548,13 +1531,13 @@ class _ConstLiteralVerifier {
             )) {
           verifier._diagnosticReporter.atNode(
             valueExpression,
-            CompileTimeErrorCode.MAP_VALUE_TYPE_NOT_ASSIGNABLE_NULLABILITY,
+            CompileTimeErrorCode.mapValueTypeNotAssignableNullability,
             arguments: [valueValue.type, expectedValueType],
           );
         } else {
           verifier._diagnosticReporter.atNode(
             valueExpression,
-            CompileTimeErrorCode.MAP_VALUE_TYPE_NOT_ASSIGNABLE,
+            CompileTimeErrorCode.mapValueTypeNotAssignable,
             arguments: [valueValue.type, expectedValueType],
           );
         }
@@ -1590,7 +1573,7 @@ class _ConstLiteralVerifier {
     }
     verifier._diagnosticReporter.atNode(
       element.expression,
-      CompileTimeErrorCode.CONST_SPREAD_EXPECTED_MAP,
+      CompileTimeErrorCode.constSpreadExpectedMap,
     );
     return false;
   }
@@ -1607,13 +1590,13 @@ class _ConstLiteralVerifier {
       )) {
         verifier._diagnosticReporter.atNode(
           expression,
-          CompileTimeErrorCode.SET_ELEMENT_TYPE_NOT_ASSIGNABLE_NULLABILITY,
+          CompileTimeErrorCode.setElementTypeNotAssignableNullability,
           arguments: [value.type, config.elementType],
         );
       } else {
         verifier._diagnosticReporter.atNode(
           expression,
-          CompileTimeErrorCode.SET_ELEMENT_TYPE_NOT_ASSIGNABLE,
+          CompileTimeErrorCode.setElementTypeNotAssignable,
           arguments: [value.type, config.elementType],
         );
       }
@@ -1624,7 +1607,7 @@ class _ConstLiteralVerifier {
     if (!value.hasPrimitiveEquality(featureSet)) {
       verifier._diagnosticReporter.atNode(
         expression,
-        CompileTimeErrorCode.CONST_SET_ELEMENT_NOT_PRIMITIVE_EQUALITY,
+        CompileTimeErrorCode.constSetElementNotPrimitiveEquality,
         arguments: [value.type],
       );
       return false;

pkg/analyzer/lib/src/dart/constant/evaluation.dart

@@ -133,7 +133,7 @@ class ConstantEvaluationEngine {
               )) {
                 constant.evaluationResult = InvalidConstant.forEntity(
                   entity: constantInitializer,
-                  diagnosticCode: CompileTimeErrorCode.VARIABLE_TYPE_MISMATCH,
+                  diagnosticCode: CompileTimeErrorCode.variableTypeMismatch,
                   arguments: [
                     dartConstant.type.getDisplayString(),
                     constant.type.getDisplayString(),
@@ -389,7 +389,7 @@ class ConstantEvaluationEngine {
       var errorNode = configuration.errorNode(node);
       result = InvalidConstant.forEntity(
         entity: errorNode,
-        diagnosticCode: CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION,
+        diagnosticCode: CompileTimeErrorCode.constEvalThrowsException,
         contextMessages: [...result.contextMessages, contextMessage],
       );
     }
@@ -437,11 +437,11 @@ class ConstantEvaluationEngine {
       // description of the cycle.
       diagnosticReporter.atElement2(
         constant,
-        CompileTimeErrorCode.RECURSIVE_COMPILE_TIME_CONSTANT,
+        CompileTimeErrorCode.recursiveCompileTimeConstant,
       );
       constant.evaluationResult = InvalidConstant.forElement(
         element: constant,
-        diagnosticCode: CompileTimeErrorCode.RECURSIVE_COMPILE_TIME_CONSTANT,
+        diagnosticCode: CompileTimeErrorCode.recursiveCompileTimeConstant,
       );
     } else if (constant is ConstructorElementImpl) {
       // We don't report cycle errors on constructor declarations here since
@@ -651,12 +651,12 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
       case ExtensionElement():
         return InvalidConstant.forEntity(
           entity: node,
-          diagnosticCode: CompileTimeErrorCode.CONST_EVAL_EXTENSION_METHOD,
+          diagnosticCode: CompileTimeErrorCode.constEvalExtensionMethod,
         );
       case ExtensionTypeElement():
         return InvalidConstant.forEntity(
           entity: node,
-          diagnosticCode: CompileTimeErrorCode.CONST_EVAL_EXTENSION_TYPE_METHOD,
+          diagnosticCode: CompileTimeErrorCode.constEvalExtensionTypeMethod,
         );
     }
 
@@ -784,7 +784,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
     if (!conditionConstant.isBool) {
       return InvalidConstant.forEntity(
         entity: condition,
-        diagnosticCode: CompileTimeErrorCode.CONST_EVAL_TYPE_BOOL,
+        diagnosticCode: CompileTimeErrorCode.constEvalTypeBool,
       );
     }
     conditionConstant = _dartObjectComputer.applyBooleanConversion(
@@ -827,7 +827,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
     if (constructorFunctionType is! FunctionTypeImpl) {
       return InvalidConstant.forEntity(
         entity: node,
-        diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+        diagnosticCode: CompileTimeErrorCode.invalidConstant,
       );
     }
     var classType = constructorFunctionType.returnType as InterfaceTypeImpl;
@@ -853,7 +853,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
     if (constructorElement == null) {
       return InvalidConstant.forEntity(
         entity: node,
-        diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+        diagnosticCode: CompileTimeErrorCode.invalidConstant,
       );
     }
 
@@ -896,7 +896,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
     // problem - the error has already been reported.
     return InvalidConstant.forEntity(
       entity: node,
-      diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+      diagnosticCode: CompileTimeErrorCode.invalidConstant,
     );
   }
 
@@ -951,8 +951,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
           return InvalidConstant.forEntity(
             entity: node,
             diagnosticCode:
-                CompileTimeErrorCode
-                    .CONST_WITH_TYPE_PARAMETERS_FUNCTION_TEAROFF,
+                CompileTimeErrorCode.constWithTypeParametersFunctionTearoff,
           );
         }
       }
@@ -968,15 +967,14 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
       var typeArgumentConstant = evaluateConstant(typeArgument);
       switch (typeArgumentConstant) {
         case InvalidConstant(
-          diagnosticCode: CompileTimeErrorCode.CONST_TYPE_PARAMETER,
+          diagnosticCode: CompileTimeErrorCode.constTypeParameter,
         ):
           // If there's a type parameter error in the evaluated constant, we
           // convert the message to a more specific function reference error.
           return InvalidConstant.forEntity(
             entity: typeArgument,
             diagnosticCode:
-                CompileTimeErrorCode
-                    .CONST_WITH_TYPE_PARAMETERS_FUNCTION_TEAROFF,
+                CompileTimeErrorCode.constWithTypeParametersFunctionTearoff,
           );
         case InvalidConstant():
           return typeArgumentConstant;
@@ -985,7 +983,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
           if (typeArgumentType == null) {
             return InvalidConstant.forEntity(
               entity: typeArgument,
-              diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+              diagnosticCode: CompileTimeErrorCode.invalidConstant,
             );
           }
           // TODO(srawlins): Test type alias types (`typedef i = int`) used as
@@ -1027,7 +1025,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
       // TODO(kallentu): Use a better error code for this.
       return InvalidConstant.forEntity(
         entity: node,
-        diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+        diagnosticCode: CompileTimeErrorCode.invalidConstant,
       );
     }
 
@@ -1067,7 +1065,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
     if (!result.isBoolNumStringOrNull) {
       return InvalidConstant.forEntity(
         entity: node,
-        diagnosticCode: CompileTimeErrorCode.CONST_EVAL_TYPE_BOOL_NUM_STRING,
+        diagnosticCode: CompileTimeErrorCode.constEvalTypeBoolNumString,
       );
     }
     return _dartObjectComputer.performToString(node, result);
@@ -1100,7 +1098,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
     if (!node.isConst) {
       return InvalidConstant.forEntity(
         entity: node,
-        diagnosticCode: CompileTimeErrorCode.MISSING_CONST_IN_LIST_LITERAL,
+        diagnosticCode: CompileTimeErrorCode.missingConstInListLiteral,
       );
     }
     var nodeType = node.staticType;
@@ -1150,7 +1148,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
         hasTypeParameterReference(type)) {
       return InvalidConstant.forEntity(
         entity: node,
-        diagnosticCode: CompileTimeErrorCode.CONST_TYPE_PARAMETER,
+        diagnosticCode: CompileTimeErrorCode.constTypeParameter,
       );
     } else if (node.isDeferred) {
       return _getDeferredLibraryError(node, node.name);
@@ -1232,12 +1230,12 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
       case ExtensionElement():
         return InvalidConstant.forEntity(
           entity: node,
-          diagnosticCode: CompileTimeErrorCode.CONST_EVAL_EXTENSION_METHOD,
+          diagnosticCode: CompileTimeErrorCode.constEvalExtensionMethod,
         );
       case ExtensionTypeElement():
         return InvalidConstant.forEntity(
           entity: node,
-          diagnosticCode: CompileTimeErrorCode.CONST_EVAL_EXTENSION_TYPE_METHOD,
+          diagnosticCode: CompileTimeErrorCode.constEvalExtensionTypeMethod,
         );
     }
 
@@ -1357,7 +1355,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
       if (!node.isConst) {
         return InvalidConstant.forEntity(
           entity: node,
-          diagnosticCode: CompileTimeErrorCode.MISSING_CONST_IN_MAP_LITERAL,
+          diagnosticCode: CompileTimeErrorCode.missingConstInMapLiteral,
         );
       }
       var keyType = _typeProvider.dynamicType;
@@ -1385,7 +1383,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
       if (!node.isConst) {
         return InvalidConstant.forEntity(
           entity: node,
-          diagnosticCode: CompileTimeErrorCode.MISSING_CONST_IN_SET_LITERAL,
+          diagnosticCode: CompileTimeErrorCode.missingConstInSetLiteral,
         );
       }
       var nodeType = node.staticType;
@@ -1473,7 +1471,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
         case ForElement():
           return InvalidConstant.forEntity(
             entity: element,
-            diagnosticCode: CompileTimeErrorCode.CONST_EVAL_FOR_ELEMENT,
+            diagnosticCode: CompileTimeErrorCode.constEvalForElement,
           );
         case IfElement():
           var condition = evaluateConstant(element.expression);
@@ -1495,7 +1493,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
               if (conditionValue == null) {
                 return InvalidConstant.forEntity(
                   entity: element.expression,
-                  diagnosticCode: CompileTimeErrorCode.NON_BOOL_CONDITION,
+                  diagnosticCode: CompileTimeErrorCode.nonBoolCondition,
                 );
               } else if (conditionValue) {
                 branchResult = _buildListConstant(
@@ -1519,7 +1517,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
         case MapLiteralEntry():
           return InvalidConstant.forEntity(
             entity: element,
-            diagnosticCode: CompileTimeErrorCode.MAP_ENTRY_NOT_IN_MAP,
+            diagnosticCode: CompileTimeErrorCode.mapEntryNotInMap,
           );
         case SpreadElement():
           var spread = evaluateConstant(element.expression);
@@ -1536,7 +1534,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
                 return InvalidConstant.forEntity(
                   entity: element.expression,
                   diagnosticCode:
-                      CompileTimeErrorCode.CONST_SPREAD_EXPECTED_LIST_OR_SET,
+                      CompileTimeErrorCode.constSpreadExpectedListOrSet,
                 );
               }
               list.addAll(listValue);
@@ -1586,12 +1584,12 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
         case Expression():
           return InvalidConstant.forEntity(
             entity: element,
-            diagnosticCode: CompileTimeErrorCode.EXPRESSION_IN_MAP,
+            diagnosticCode: CompileTimeErrorCode.expressionInMap,
           );
         case ForElement():
           return InvalidConstant.forEntity(
             entity: element,
-            diagnosticCode: CompileTimeErrorCode.CONST_EVAL_FOR_ELEMENT,
+            diagnosticCode: CompileTimeErrorCode.constEvalForElement,
           );
         case IfElement():
           var condition = evaluateConstant(element.expression);
@@ -1614,7 +1612,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
               if (conditionValue == null) {
                 return InvalidConstant.forEntity(
                   entity: element.expression,
-                  diagnosticCode: CompileTimeErrorCode.NON_BOOL_CONDITION,
+                  diagnosticCode: CompileTimeErrorCode.nonBoolCondition,
                 );
               } else if (conditionValue) {
                 branchResult = _buildMapConstant(
@@ -1663,8 +1661,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
               if (mapValue == null) {
                 return InvalidConstant.forEntity(
                   entity: element.expression,
-                  diagnosticCode:
-                      CompileTimeErrorCode.CONST_SPREAD_EXPECTED_MAP,
+                  diagnosticCode: CompileTimeErrorCode.constSpreadExpectedMap,
                 );
               }
               map.addAll(mapValue);
@@ -1674,7 +1671,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
           // `CompileTimeErrorCode.NULL_AWARE_ELEMENT_IN_MAP`?
           return InvalidConstant.forEntity(
             entity: element,
-            diagnosticCode: CompileTimeErrorCode.EXPRESSION_IN_MAP,
+            diagnosticCode: CompileTimeErrorCode.expressionInMap,
           );
       }
     }
@@ -1713,7 +1710,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
         case ForElement():
           return InvalidConstant.forEntity(
             entity: element,
-            diagnosticCode: CompileTimeErrorCode.CONST_EVAL_FOR_ELEMENT,
+            diagnosticCode: CompileTimeErrorCode.constEvalForElement,
           );
         case IfElement():
           var condition = evaluateConstant(element.expression);
@@ -1735,7 +1732,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
               if (conditionValue == null) {
                 return InvalidConstant.forEntity(
                   entity: element.expression,
-                  diagnosticCode: CompileTimeErrorCode.NON_BOOL_CONDITION,
+                  diagnosticCode: CompileTimeErrorCode.nonBoolCondition,
                 );
               } else if (conditionValue) {
                 branchResult = _buildSetConstant(
@@ -1759,7 +1756,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
         case MapLiteralEntry():
           return InvalidConstant.forEntity(
             entity: element,
-            diagnosticCode: CompileTimeErrorCode.MAP_ENTRY_NOT_IN_MAP,
+            diagnosticCode: CompileTimeErrorCode.mapEntryNotInMap,
           );
         case SpreadElement():
           var spread = evaluateConstant(element.expression);
@@ -1776,7 +1773,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
                 return InvalidConstant.forEntity(
                   entity: element.expression,
                   diagnosticCode:
-                      CompileTimeErrorCode.CONST_SPREAD_EXPECTED_LIST_OR_SET,
+                      CompileTimeErrorCode.constSpreadExpectedListOrSet,
                 );
               }
               set.addAll(setValue);
@@ -1862,12 +1859,12 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
       case ExtensionElement():
         return InvalidConstant.forEntity(
           entity: errorNode,
-          diagnosticCode: CompileTimeErrorCode.CONST_EVAL_EXTENSION_METHOD,
+          diagnosticCode: CompileTimeErrorCode.constEvalExtensionMethod,
         );
       case ExtensionTypeElement():
         return InvalidConstant.forEntity(
           entity: errorNode,
-          diagnosticCode: CompileTimeErrorCode.CONST_EVAL_EXTENSION_TYPE_METHOD,
+          diagnosticCode: CompileTimeErrorCode.constEvalExtensionTypeMethod,
         );
     }
 
@@ -1890,7 +1887,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
     // No other property access is allowed except for `.length` of a `String`.
     return InvalidConstant.forEntity(
       entity: errorNode,
-      diagnosticCode: CompileTimeErrorCode.CONST_EVAL_PROPERTY_ACCESS,
+      diagnosticCode: CompileTimeErrorCode.constEvalPropertyAccess,
       arguments: [identifier.name, targetType.getDisplayString()],
     );
   }
@@ -1922,7 +1919,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
             false)) {
       return InvalidConstant.forEntity(
         entity: expression,
-        diagnosticCode: CompileTimeErrorCode.CONST_TYPE_PARAMETER,
+        diagnosticCode: CompileTimeErrorCode.constTypeParameter,
       );
     }
 
@@ -1947,7 +1944,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
             if (identifier == null) {
               return InvalidConstant.forEntity(
                 entity: errorNode,
-                diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+                diagnosticCode: CompileTimeErrorCode.invalidConstant,
               );
             }
             return _instantiateFunctionTypeForSimpleIdentifier(
@@ -1959,7 +1956,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
             // if we remove `avoidReporting`.
             return InvalidConstant.forEntity(
               entity: errorNode,
-              diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+              diagnosticCode: CompileTimeErrorCode.invalidConstant,
               avoidReporting: true,
               isUnresolved: true,
             );
@@ -1982,7 +1979,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
         if (identifier == null) {
           return InvalidConstant.forEntity(
             entity: errorNode,
-            diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+            diagnosticCode: CompileTimeErrorCode.invalidConstant,
           );
         }
         return _instantiateFunctionTypeForSimpleIdentifier(identifier, rawType);
@@ -2043,7 +2040,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
         }
         return InvalidConstant.forEntity(
           entity: errorNode2,
-          diagnosticCode: CompileTimeErrorCode.CONST_TYPE_PARAMETER,
+          diagnosticCode: CompileTimeErrorCode.constTypeParameter,
         );
       }
     }
@@ -2063,7 +2060,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
   /// library.
   ///
   /// If no specific error can be chosen, an [InvalidConstant] error using
-  /// [CompileTimeErrorCode.INVALID_CONSTANT] is returned.
+  /// [CompileTimeErrorCode.invalidConstant] is returned.
   InvalidConstant _getDeferredLibraryError(
     AstNode node,
     SyntacticEntity errorTarget,
@@ -2073,45 +2070,40 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
       for (AstNode? current = node; current != null;) {
         if (current is Annotation) {
           return CompileTimeErrorCode
-              .INVALID_ANNOTATION_CONSTANT_VALUE_FROM_DEFERRED_LIBRARY;
+              .invalidAnnotationConstantValueFromDeferredLibrary;
         } else if (current is ConstantContextForExpressionImpl) {
           return CompileTimeErrorCode
-              .CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE_FROM_DEFERRED_LIBRARY;
+              .constInitializedWithNonConstantValueFromDeferredLibrary;
         } else if (current is DefaultFormalParameter) {
           return CompileTimeErrorCode
-              .NON_CONSTANT_DEFAULT_VALUE_FROM_DEFERRED_LIBRARY;
+              .nonConstantDefaultValueFromDeferredLibrary;
         } else if (current is IfElement && current.expression == node) {
-          return CompileTimeErrorCode
-              .IF_ELEMENT_CONDITION_FROM_DEFERRED_LIBRARY;
+          return CompileTimeErrorCode.ifElementConditionFromDeferredLibrary;
         } else if (current is InstanceCreationExpression) {
           return CompileTimeErrorCode
-              .CONST_CONSTRUCTOR_CONSTANT_FROM_DEFERRED_LIBRARY;
+              .constConstructorConstantFromDeferredLibrary;
         } else if (current is ListLiteral) {
-          return CompileTimeErrorCode
-              .NON_CONSTANT_LIST_ELEMENT_FROM_DEFERRED_LIBRARY;
+          return CompileTimeErrorCode.nonConstantListElementFromDeferredLibrary;
         } else if (current is MapLiteralEntry) {
           if (previous == current.key) {
-            return CompileTimeErrorCode
-                .NON_CONSTANT_MAP_KEY_FROM_DEFERRED_LIBRARY;
+            return CompileTimeErrorCode.nonConstantMapKeyFromDeferredLibrary;
           } else {
-            return CompileTimeErrorCode
-                .NON_CONSTANT_MAP_VALUE_FROM_DEFERRED_LIBRARY;
+            return CompileTimeErrorCode.nonConstantMapValueFromDeferredLibrary;
           }
         } else if (current is RecordLiteral) {
-          return CompileTimeErrorCode
-              .NON_CONSTANT_RECORD_FIELD_FROM_DEFERRED_LIBRARY;
+          return CompileTimeErrorCode.nonConstantRecordFieldFromDeferredLibrary;
         } else if (current is SetOrMapLiteral) {
-          return CompileTimeErrorCode.SET_ELEMENT_FROM_DEFERRED_LIBRARY;
+          return CompileTimeErrorCode.setElementFromDeferredLibrary;
         } else if (current is SpreadElement) {
-          return CompileTimeErrorCode.SPREAD_EXPRESSION_FROM_DEFERRED_LIBRARY;
+          return CompileTimeErrorCode.spreadExpressionFromDeferredLibrary;
         } else if (current is SwitchCase) {
           return CompileTimeErrorCode
-              .NON_CONSTANT_CASE_EXPRESSION_FROM_DEFERRED_LIBRARY;
+              .nonConstantCaseExpressionFromDeferredLibrary;
         } else if (current is SwitchPatternCase) {
-          return CompileTimeErrorCode.PATTERN_CONSTANT_FROM_DEFERRED_LIBRARY;
+          return CompileTimeErrorCode.patternConstantFromDeferredLibrary;
         } else if (current is VariableDeclaration) {
           return CompileTimeErrorCode
-              .CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE_FROM_DEFERRED_LIBRARY;
+              .constInitializedWithNonConstantValueFromDeferredLibrary;
         }
         previous = current;
         current = current.parent;
@@ -2125,7 +2117,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
     }
     return InvalidConstant.forEntity(
       entity: node,
-      diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+      diagnosticCode: CompileTimeErrorCode.invalidConstant,
     );
   }
 
@@ -2201,14 +2193,14 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
     if (node.staticType is InvalidType) {
       return InvalidConstant.forEntity(
         entity: node,
-        diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+        diagnosticCode: CompileTimeErrorCode.invalidConstant,
         isUnresolved: true,
       );
     }
 
     return InvalidConstant.forEntity(
       entity: node,
-      diagnosticCode: CompileTimeErrorCode.CONST_EVAL_METHOD_INVOCATION,
+      diagnosticCode: CompileTimeErrorCode.constEvalMethodInvocation,
     );
   }
 
@@ -2224,7 +2216,7 @@ class ConstantVisitor extends UnifyingAstVisitor<Constant> {
     // Only report the first invalid constant we see.
     return InvalidConstant.forEntity(
       entity: notPotentiallyConstants.first,
-      diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+      diagnosticCode: CompileTimeErrorCode.invalidConstant,
     );
   }
 
@@ -2706,7 +2698,7 @@ class DartObjectComputer {
           return InvalidConstant.forEntity(
             entity: typeArgumentsErrorNode,
             diagnosticCode:
-                CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_FUNCTION,
+                CompileTimeErrorCode.wrongNumberOfTypeArgumentsFunction,
             arguments: [
               node.name,
               rawType.typeParameters.length,
@@ -2717,8 +2709,7 @@ class DartObjectComputer {
         return InvalidConstant.forEntity(
           entity: typeArgumentsErrorNode,
           diagnosticCode:
-              CompileTimeErrorCode
-                  .WRONG_NUMBER_OF_TYPE_ARGUMENTS_ANONYMOUS_FUNCTION,
+              CompileTimeErrorCode.wrongNumberOfTypeArgumentsAnonymousFunction,
           arguments: [rawType.typeParameters.length, typeArguments.length],
         );
       }
@@ -2727,7 +2718,7 @@ class DartObjectComputer {
     } else {
       return InvalidConstant.forEntity(
         entity: node,
-        diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+        diagnosticCode: CompileTimeErrorCode.invalidConstant,
       );
     }
   }
@@ -2892,7 +2883,7 @@ class _InstanceCreationEvaluator {
       if (!_checkFromEnvironmentArguments(arguments, definingType)) {
         return InvalidConstant.forEntity(
           entity: _errorNode,
-          diagnosticCode: CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION,
+          diagnosticCode: CompileTimeErrorCode.constEvalThrowsException,
         );
       }
       String? variableName =
@@ -2935,7 +2926,7 @@ class _InstanceCreationEvaluator {
       if (!_checkSymbolArguments(arguments)) {
         return InvalidConstant.forEntity(
           entity: _errorNode,
-          diagnosticCode: CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION,
+          diagnosticCode: CompileTimeErrorCode.constEvalThrowsException,
         );
       }
       return DartObjectImpl(
@@ -3060,7 +3051,7 @@ class _InstanceCreationEvaluator {
           return InvalidConstant.forEntity(
             entity: errorNode,
             diagnosticCode:
-                CompileTimeErrorCode.CONST_CONSTRUCTOR_FIELD_TYPE_MISMATCH,
+                CompileTimeErrorCode.constConstructorFieldTypeMismatch,
             arguments: [
               fieldValue.type.getDisplayString(),
               field.name ?? '',
@@ -3137,8 +3128,7 @@ class _InstanceCreationEvaluator {
               return _InitializersEvaluationResult(
                 InvalidConstant.forEntity(
                   entity: _errorNode,
-                  diagnosticCode:
-                      CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION,
+                  diagnosticCode: CompileTimeErrorCode.constEvalThrowsException,
                 ),
                 evaluationIsComplete: true,
               );
@@ -3161,8 +3151,7 @@ class _InstanceCreationEvaluator {
                   InvalidConstant.forEntity(
                     entity: errorNode,
                     diagnosticCode:
-                        CompileTimeErrorCode
-                            .CONST_CONSTRUCTOR_FIELD_TYPE_MISMATCH,
+                        CompileTimeErrorCode.constConstructorFieldTypeMismatch,
                     arguments: [
                       evaluationResult.type.getDisplayString(),
                       fieldName,
@@ -3259,7 +3248,7 @@ class _InstanceCreationEvaluator {
                       entity: initializer,
                       diagnosticCode:
                           CompileTimeErrorCode
-                              .CONST_EVAL_ASSERTION_FAILURE_WITH_MESSAGE,
+                              .constEvalAssertionFailureWithMessage,
                       arguments: [assertMessage],
                       isRuntimeException: true,
                     );
@@ -3269,8 +3258,7 @@ class _InstanceCreationEvaluator {
 
               invalidConstant ??= InvalidConstant.forEntity(
                 entity: initializer,
-                diagnosticCode:
-                    CompileTimeErrorCode.CONST_EVAL_ASSERTION_FAILURE,
+                diagnosticCode: CompileTimeErrorCode.constEvalAssertionFailure,
                 isRuntimeException: true,
               );
               return _InitializersEvaluationResult(
@@ -3377,7 +3365,7 @@ class _InstanceCreationEvaluator {
           return InvalidConstant.forEntity(
             entity: errorTarget,
             diagnosticCode:
-                CompileTimeErrorCode.CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
+                CompileTimeErrorCode.constConstructorParamTypeMismatch,
             arguments: [
               argumentValue.type.getDisplayString(),
               parameter.type.getDisplayString(),
@@ -3398,8 +3386,7 @@ class _InstanceCreationEvaluator {
                 return InvalidConstant.forEntity(
                   entity: errorTarget,
                   diagnosticCode:
-                      CompileTimeErrorCode
-                          .CONST_CONSTRUCTOR_PARAM_TYPE_MISMATCH,
+                      CompileTimeErrorCode.constConstructorParamTypeMismatch,
                   arguments: [
                     argumentValue.type.getDisplayString(),
                     fieldType.getDisplayString(),
@@ -3411,8 +3398,7 @@ class _InstanceCreationEvaluator {
             if (_fieldMap.containsKey(fieldName)) {
               return InvalidConstant.forEntity(
                 entity: _errorNode,
-                diagnosticCode:
-                    CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION,
+                diagnosticCode: CompileTimeErrorCode.constEvalThrowsException,
               );
             }
             _fieldMap[fieldName] = argumentValue;
@@ -3574,7 +3560,7 @@ class _InstanceCreationEvaluator {
       }
       return InvalidConstant.forEntity(
         entity: keyword ?? node,
-        diagnosticCode: CompileTimeErrorCode.CONST_WITH_NON_CONST,
+        diagnosticCode: CompileTimeErrorCode.constWithNonConst,
       );
     }
 

pkg/analyzer/lib/src/dart/constant/value.dart

@@ -365,9 +365,7 @@ class DartObjectImpl implements DartObject, Constant {
 
     if (!typeSystem.isSubtypeOf(type, resultType)) {
       // TODO(kallentu): Make a more specific error for casting.
-      throw EvaluationException(
-        CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION,
-      );
+      throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
     }
     return this;
   }
@@ -449,7 +447,7 @@ class DartObjectImpl implements DartObject, Constant {
         state.bitAnd(rightOperand.state),
       );
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_TYPE_BOOL_INT);
+    throw EvaluationException(CompileTimeErrorCode.constEvalTypeBoolInt);
   }
 
   /// Return the result of invoking the '|' operator on this object with the
@@ -474,7 +472,7 @@ class DartObjectImpl implements DartObject, Constant {
         state.bitOr(rightOperand.state),
       );
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_TYPE_BOOL_INT);
+    throw EvaluationException(CompileTimeErrorCode.constEvalTypeBoolInt);
   }
 
   /// Return the result of invoking the '^' operator on this object with the
@@ -499,7 +497,7 @@ class DartObjectImpl implements DartObject, Constant {
         state.bitXor(rightOperand.state),
       );
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_TYPE_BOOL_INT);
+    throw EvaluationException(CompileTimeErrorCode.constEvalTypeBoolInt);
   }
 
   /// Returns the result of invoking the '==' operator on this object with the
@@ -540,8 +538,8 @@ class DartObjectImpl implements DartObject, Constant {
     }
     throw EvaluationException(
       featureSet.isEnabled(Feature.patterns)
-          ? CompileTimeErrorCode.CONST_EVAL_PRIMITIVE_EQUALITY
-          : CompileTimeErrorCode.CONST_EVAL_TYPE_BOOL_NUM_STRING,
+          ? CompileTimeErrorCode.constEvalPrimitiveEquality
+          : CompileTimeErrorCode.constEvalTypeBoolNumString,
     );
   }
 
@@ -1072,7 +1070,7 @@ class DartObjectImpl implements DartObject, Constant {
   /// value.
   void _assertType(DartObjectImpl object) {
     if (object.state is! TypeState) {
-      throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_TYPE_TYPE);
+      throw EvaluationException(CompileTimeErrorCode.constEvalTypeType);
     }
   }
 }
@@ -1121,7 +1119,7 @@ class DoubleState extends NumState {
       }
       return DoubleState(value! + rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -1151,7 +1149,7 @@ class DoubleState extends NumState {
       }
       return DoubleState(value! / rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -1173,7 +1171,7 @@ class DoubleState extends NumState {
       }
       return BoolState.from(value! > rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -1195,7 +1193,7 @@ class DoubleState extends NumState {
       }
       return BoolState.from(value! >= rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -1223,7 +1221,7 @@ class DoubleState extends NumState {
         return IntState(result.toInt());
       }
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -1273,7 +1271,7 @@ class DoubleState extends NumState {
       }
       return BoolState.from(value! < rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -1295,7 +1293,7 @@ class DoubleState extends NumState {
       }
       return BoolState.from(value! <= rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -1317,7 +1315,7 @@ class DoubleState extends NumState {
       }
       return DoubleState(value! - rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -1347,7 +1345,7 @@ class DoubleState extends NumState {
       }
       return DoubleState(value! % rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -1369,7 +1367,7 @@ class DoubleState extends NumState {
       }
       return DoubleState(value! * rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -1654,14 +1652,14 @@ abstract class InstanceState {
     }
     assertNumStringOrNull(this);
     assertNumStringOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Throws an exception if the given [state] does not represent a `bool`
   /// value.
   void assertBool(InstanceState? state) {
     if (state is! BoolState) {
-      throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_TYPE_BOOL);
+      throw EvaluationException(CompileTimeErrorCode.constEvalTypeBool);
     }
   }
 
@@ -1669,7 +1667,7 @@ abstract class InstanceState {
   /// `null` value.
   void assertIntOrNull(InstanceState state) {
     if (!(state is IntState || state is NullState)) {
-      throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_TYPE_INT);
+      throw EvaluationException(CompileTimeErrorCode.constEvalTypeInt);
     }
   }
 
@@ -1677,7 +1675,7 @@ abstract class InstanceState {
   /// `null` value.
   void assertNumOrNull(InstanceState state) {
     if (!(state is NumState || state is NullState)) {
-      throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_TYPE_NUM);
+      throw EvaluationException(CompileTimeErrorCode.constEvalTypeNum);
     }
   }
 
@@ -1685,9 +1683,7 @@ abstract class InstanceState {
   /// `String`, or `null` value.
   void assertNumStringOrNull(InstanceState state) {
     if (!(state is NumState || state is StringState || state is NullState)) {
-      throw EvaluationException(
-        CompileTimeErrorCode.CONST_EVAL_TYPE_NUM_STRING,
-      );
+      throw EvaluationException(CompileTimeErrorCode.constEvalTypeNumString);
     }
   }
 
@@ -1695,7 +1691,7 @@ abstract class InstanceState {
   /// value.
   void assertString(InstanceState state) {
     if (state is! StringState) {
-      throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_TYPE_STRING);
+      throw EvaluationException(CompileTimeErrorCode.constEvalTypeString);
     }
   }
 
@@ -1707,7 +1703,7 @@ abstract class InstanceState {
   IntState bitAnd(InstanceState rightOperand) {
     assertIntOrNull(this);
     assertIntOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '~' operator on this object.
@@ -1716,7 +1712,7 @@ abstract class InstanceState {
   /// object of this kind.
   IntState bitNot() {
     assertIntOrNull(this);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '|' operator on this object with the
@@ -1727,7 +1723,7 @@ abstract class InstanceState {
   IntState bitOr(InstanceState rightOperand) {
     assertIntOrNull(this);
     assertIntOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '^' operator on this object with the
@@ -1738,7 +1734,7 @@ abstract class InstanceState {
   IntState bitXor(InstanceState rightOperand) {
     assertIntOrNull(this);
     assertIntOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the ' ' operator on this object with the
@@ -1748,7 +1744,7 @@ abstract class InstanceState {
   /// object of this kind.
   StringState concatenate(InstanceState rightOperand) {
     assertString(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of applying boolean conversion to this object.
@@ -1771,7 +1767,7 @@ abstract class InstanceState {
   NumState divide(InstanceState rightOperand) {
     assertNumOrNull(this);
     assertNumOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '==' operator on this object with the
@@ -1789,7 +1785,7 @@ abstract class InstanceState {
   BoolState greaterThan(InstanceState rightOperand) {
     assertNumOrNull(this);
     assertNumOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '&gt;=' operator on this object with the
@@ -1800,7 +1796,7 @@ abstract class InstanceState {
   BoolState greaterThanOrEqual(InstanceState rightOperand) {
     assertNumOrNull(this);
     assertNumOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Returns `true` if this value, inside a library with the [featureSet],
@@ -1815,7 +1811,7 @@ abstract class InstanceState {
   IntState integerDivide(InstanceState rightOperand) {
     assertNumOrNull(this);
     assertNumOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the identical function on this object with
@@ -1860,7 +1856,7 @@ abstract class InstanceState {
   BoolState lessThan(InstanceState rightOperand) {
     assertNumOrNull(this);
     assertNumOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '&lt;=' operator on this object with the
@@ -1871,7 +1867,7 @@ abstract class InstanceState {
   BoolState lessThanOrEqual(InstanceState rightOperand) {
     assertNumOrNull(this);
     assertNumOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '&' operator on this object with the
@@ -1923,7 +1919,7 @@ abstract class InstanceState {
   IntState logicalShiftRight(InstanceState rightOperand) {
     assertIntOrNull(this);
     assertIntOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '^' operator on this object with the
@@ -1950,7 +1946,7 @@ abstract class InstanceState {
   NumState minus(InstanceState rightOperand) {
     assertNumOrNull(this);
     assertNumOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '-' operator on this object.
@@ -1959,7 +1955,7 @@ abstract class InstanceState {
   /// object of this kind.
   NumState negated() {
     assertNumOrNull(this);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '%' operator on this object with the
@@ -1970,7 +1966,7 @@ abstract class InstanceState {
   NumState remainder(InstanceState rightOperand) {
     assertNumOrNull(this);
     assertNumOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '&lt;&lt;' operator on this object with
@@ -1981,7 +1977,7 @@ abstract class InstanceState {
   IntState shiftLeft(InstanceState rightOperand) {
     assertIntOrNull(this);
     assertIntOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '&gt;&gt;' operator on this object with
@@ -1992,7 +1988,7 @@ abstract class InstanceState {
   IntState shiftRight(InstanceState rightOperand) {
     assertIntOrNull(this);
     assertIntOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the 'length' getter on this object.
@@ -2001,7 +1997,7 @@ abstract class InstanceState {
   /// object of this kind.
   IntState stringLength() {
     assertString(this);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   /// Return the result of invoking the '*' operator on this object with the
@@ -2012,7 +2008,7 @@ abstract class InstanceState {
   NumState times(InstanceState rightOperand) {
     assertNumOrNull(this);
     assertNumOrNull(rightOperand);
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 }
 
@@ -2065,7 +2061,7 @@ class IntState extends NumState {
       }
       return DoubleState(value!.toDouble() + rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2081,7 +2077,7 @@ class IntState extends NumState {
       }
       return IntState(value! & rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2105,7 +2101,7 @@ class IntState extends NumState {
       }
       return IntState(value! | rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2121,7 +2117,7 @@ class IntState extends NumState {
       }
       return IntState(value! ^ rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2152,7 +2148,7 @@ class IntState extends NumState {
       }
       return DoubleState(value!.toDouble() / rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2174,7 +2170,7 @@ class IntState extends NumState {
       }
       return BoolState.from(value!.toDouble() > rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2196,7 +2192,7 @@ class IntState extends NumState {
       }
       return BoolState.from(value!.toDouble() >= rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2214,7 +2210,7 @@ class IntState extends NumState {
         return UNKNOWN_VALUE;
       } else if (rightValue == 0) {
         throw EvaluationException(
-          CompileTimeErrorCode.CONST_EVAL_THROWS_IDBZE,
+          CompileTimeErrorCode.constEvalThrowsIdbze,
           isRuntimeException: true,
         );
       }
@@ -2229,7 +2225,7 @@ class IntState extends NumState {
         return IntState(result.toInt());
       }
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2272,7 +2268,7 @@ class IntState extends NumState {
       }
       return BoolState.from(value!.toDouble() < rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2294,7 +2290,7 @@ class IntState extends NumState {
       }
       return BoolState.from(value!.toDouble() <= rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2317,7 +2313,7 @@ class IntState extends NumState {
         );
       }
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2342,7 +2338,7 @@ class IntState extends NumState {
       }
       return DoubleState(value!.toDouble() - rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2377,7 +2373,7 @@ class IntState extends NumState {
       }
       return DoubleState(value!.toDouble() % rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2397,7 +2393,7 @@ class IntState extends NumState {
         return IntState(value! << rightValue);
       }
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2417,7 +2413,7 @@ class IntState extends NumState {
         return IntState(value! >> rightValue);
       }
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2442,7 +2438,7 @@ class IntState extends NumState {
       }
       return DoubleState(value!.toDouble() * rightValue);
     }
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2481,7 +2477,7 @@ class InvalidConstant implements Constant {
   ///
   /// In [ConstantEvaluationEngine.evaluateAndFormatErrorsInConstructorCall],
   /// we convert this error into a
-  /// [CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION] with a context message
+  /// [CompileTimeErrorCode.constEvalThrowsException] with a context message
   /// pointing to where the exception was thrown.
   final bool isRuntimeException;
 
@@ -2557,13 +2553,13 @@ class InvalidConstant implements Constant {
         parent2.isConst) {
       return InvalidConstant.forEntity(
         entity: node,
-        diagnosticCode: CompileTimeErrorCode.CONST_WITH_NON_CONSTANT_ARGUMENT,
+        diagnosticCode: CompileTimeErrorCode.constWithNonConstantArgument,
         isUnresolved: isUnresolved,
       );
     }
     return InvalidConstant.forEntity(
       entity: node,
-      diagnosticCode: CompileTimeErrorCode.INVALID_CONSTANT,
+      diagnosticCode: CompileTimeErrorCode.invalidConstant,
       isUnresolved: isUnresolved,
     );
   }
@@ -2819,7 +2815,7 @@ class NullState extends InstanceState {
 
   @override
   BoolState convertToBool() {
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override
@@ -2840,7 +2836,7 @@ class NullState extends InstanceState {
 
   @override
   BoolState logicalNot() {
-    throw EvaluationException(CompileTimeErrorCode.CONST_EVAL_THROWS_EXCEPTION);
+    throw EvaluationException(CompileTimeErrorCode.constEvalThrowsException);
   }
 
   @override

pkg/analyzer/lib/src/dart/element/generic_inferrer.dart

@@ -323,7 +323,7 @@ class GenericInferrer {
 
         _diagnosticReporter?.atEntity(
           errorEntity!,
-          CompileTimeErrorCode.COULD_NOT_INFER,
+          CompileTimeErrorCode.couldNotInfer,
           arguments: [name, _formatError(parameter, inferred, constraints)],
         );
 
@@ -352,7 +352,7 @@ class GenericInferrer {
         var typeParametersStr = typeParameters.map(_elementStr).join(', ');
         _diagnosticReporter.atEntity(
           errorEntity!,
-          CompileTimeErrorCode.COULD_NOT_INFER,
+          CompileTimeErrorCode.couldNotInfer,
           arguments: [
             name,
             ' Inferred candidate type ${_typeStr(inferred)} has type parameters'
@@ -409,7 +409,7 @@ class GenericInferrer {
         // TODO(jmesserly): improve this error message.
         _diagnosticReporter?.atEntity(
           errorEntity!,
-          CompileTimeErrorCode.COULD_NOT_INFER,
+          CompileTimeErrorCode.couldNotInfer,
           arguments: [
             name,
             "\nRecursive bound cannot be instantiated: '$typeParamBound'."
@@ -461,7 +461,7 @@ class GenericInferrer {
       if (!_typeSystem.isSubtypeOf(argument, bound)) {
         diagnosticReporter?.atEntity(
           errorEntity!,
-          CompileTimeErrorCode.COULD_NOT_INFER,
+          CompileTimeErrorCode.couldNotInfer,
           arguments: [
             name,
             "\n'${_typeStr(argument)}' doesn't conform to "
@@ -735,7 +735,7 @@ class GenericInferrer {
               : '${errorEntity.type}.${errorEntity.name}';
       diagnosticReporter.atNode(
         errorEntity,
-        WarningCode.INFERENCE_FAILURE_ON_INSTANCE_CREATION,
+        WarningCode.inferenceFailureOnInstanceCreation,
         arguments: [constructorName],
       );
     } else if (errorEntity is Annotation) {
@@ -749,7 +749,7 @@ class GenericInferrer {
                   : '${errorEntity.name.name}.${errorEntity.constructorName}';
           diagnosticReporter.atNode(
             errorEntity,
-            WarningCode.INFERENCE_FAILURE_ON_INSTANCE_CREATION,
+            WarningCode.inferenceFailureOnInstanceCreation,
             arguments: [constructorName],
           );
         }
@@ -773,7 +773,7 @@ class GenericInferrer {
         if (!element.metadata.hasOptionalTypeArgs) {
           diagnosticReporter.atNode(
             errorEntity,
-            WarningCode.INFERENCE_FAILURE_ON_FUNCTION_INVOCATION,
+            WarningCode.inferenceFailureOnFunctionInvocation,
             arguments: [errorEntity.name],
           );
           return;
@@ -785,7 +785,7 @@ class GenericInferrer {
         var typeDisplayString = _typeStr(type);
         diagnosticReporter.atNode(
           errorEntity,
-          WarningCode.INFERENCE_FAILURE_ON_GENERIC_INVOCATION,
+          WarningCode.inferenceFailureOnGenericInvocation,
           arguments: [typeDisplayString],
         );
         return;

pkg/analyzer/lib/src/dart/error/ffi_code.g.dart

@@ -28,7 +28,7 @@ import "package:_fe_analyzer_shared/src/base/errors.dart";
 
 class FfiCode extends DiagnosticCode {
   /// No parameters.
-  static const FfiCode ABI_SPECIFIC_INTEGER_INVALID = FfiCode(
+  static const FfiCode abiSpecificIntegerInvalid = FfiCode(
     'ABI_SPECIFIC_INTEGER_INVALID',
     "Classes extending 'AbiSpecificInteger' must have exactly one const "
         "constructor, no other members, and no type parameters.",
@@ -39,7 +39,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode ABI_SPECIFIC_INTEGER_MAPPING_EXTRA = FfiCode(
+  static const FfiCode abiSpecificIntegerMappingExtra = FfiCode(
     'ABI_SPECIFIC_INTEGER_MAPPING_EXTRA',
     "Classes extending 'AbiSpecificInteger' must have exactly one "
         "'AbiSpecificIntegerMapping' annotation specifying the mapping from "
@@ -49,7 +49,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode ABI_SPECIFIC_INTEGER_MAPPING_MISSING = FfiCode(
+  static const FfiCode abiSpecificIntegerMappingMissing = FfiCode(
     'ABI_SPECIFIC_INTEGER_MAPPING_MISSING',
     "Classes extending 'AbiSpecificInteger' must have exactly one "
         "'AbiSpecificIntegerMapping' annotation specifying the mapping from "
@@ -60,7 +60,7 @@ class FfiCode extends DiagnosticCode {
 
   /// Parameters:
   /// String p0: the value of the invalid mapping
-  static const FfiCode ABI_SPECIFIC_INTEGER_MAPPING_UNSUPPORTED = FfiCode(
+  static const FfiCode abiSpecificIntegerMappingUnsupported = FfiCode(
     'ABI_SPECIFIC_INTEGER_MAPPING_UNSUPPORTED',
     "Invalid mapping to '{0}'; only mappings to 'Int8', 'Int16', 'Int32', "
         "'Int64', 'Uint8', 'Uint16', 'UInt32', and 'Uint64' are supported.",
@@ -71,14 +71,14 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode ADDRESS_POSITION = FfiCode(
+  static const FfiCode addressPosition = FfiCode(
     'ADDRESS_POSITION',
     "The '.address' expression can only be used as argument to a leaf native "
         "external call.",
   );
 
   /// No parameters.
-  static const FfiCode ADDRESS_RECEIVER = FfiCode(
+  static const FfiCode addressReceiver = FfiCode(
     'ADDRESS_RECEIVER',
     "The receiver of '.address' must be a concrete 'TypedData', a concrete "
         "'TypedData' '[]', an 'Array', an 'Array' '[]', a Struct field, or a "
@@ -88,7 +88,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode ANNOTATION_ON_POINTER_FIELD = FfiCode(
+  static const FfiCode annotationOnPointerField = FfiCode(
     'ANNOTATION_ON_POINTER_FIELD',
     "Fields in a struct class whose type is 'Pointer' shouldn't have any "
         "annotations.",
@@ -98,7 +98,7 @@ class FfiCode extends DiagnosticCode {
 
   /// Parameters:
   /// String p0: the name of the argument
-  static const FfiCode ARGUMENT_MUST_BE_A_CONSTANT = FfiCode(
+  static const FfiCode argumentMustBeAConstant = FfiCode(
     'ARGUMENT_MUST_BE_A_CONSTANT',
     "Argument '{0}' must be a constant.",
     correctionMessage: "Try replacing the value with a literal or const.",
@@ -106,7 +106,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode ARGUMENT_MUST_BE_NATIVE = FfiCode(
+  static const FfiCode argumentMustBeNative = FfiCode(
     'ARGUMENT_MUST_BE_NATIVE',
     "Argument to 'Native.addressOf' must be annotated with @Native",
     correctionMessage:
@@ -116,7 +116,7 @@ class FfiCode extends DiagnosticCode {
 
   /// Parameters:
   /// String p0: the name of the struct or union class
-  static const FfiCode COMPOUND_IMPLEMENTS_FINALIZABLE = FfiCode(
+  static const FfiCode compoundImplementsFinalizable = FfiCode(
     'COMPOUND_IMPLEMENTS_FINALIZABLE',
     "The class '{0}' can't implement Finalizable.",
     correctionMessage: "Try removing the implements clause from '{0}'.",
@@ -124,7 +124,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode CREATION_OF_STRUCT_OR_UNION = FfiCode(
+  static const FfiCode creationOfStructOrUnion = FfiCode(
     'CREATION_OF_STRUCT_OR_UNION',
     "Subclasses of 'Struct' and 'Union' are backed by native memory, and can't "
         "be instantiated by a generative constructor.",
@@ -136,7 +136,7 @@ class FfiCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the name of the subclass
   /// String p1: the name of the superclass
-  static const FfiCode EMPTY_STRUCT = FfiCode(
+  static const FfiCode emptyStruct = FfiCode(
     'EMPTY_STRUCT',
     "The class '{0}' can't be empty because it's a subclass of '{1}'.",
     correctionMessage:
@@ -145,7 +145,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode EXTRA_ANNOTATION_ON_STRUCT_FIELD = FfiCode(
+  static const FfiCode extraAnnotationOnStructField = FfiCode(
     'EXTRA_ANNOTATION_ON_STRUCT_FIELD',
     "Fields in a struct class must have exactly one annotation indicating the "
         "native type.",
@@ -154,7 +154,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode EXTRA_SIZE_ANNOTATION_CARRAY = FfiCode(
+  static const FfiCode extraSizeAnnotationCarray = FfiCode(
     'EXTRA_SIZE_ANNOTATION_CARRAY',
     "'Array's must have exactly one 'Array' annotation.",
     correctionMessage: "Try removing the extra annotation.",
@@ -162,7 +162,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode FFI_NATIVE_INVALID_DUPLICATE_DEFAULT_ASSET = FfiCode(
+  static const FfiCode ffiNativeInvalidDuplicateDefaultAsset = FfiCode(
     'FFI_NATIVE_INVALID_DUPLICATE_DEFAULT_ASSET',
     "There may be at most one @DefaultAsset annotation on a library.",
     correctionMessage: "Try removing the extra annotation.",
@@ -170,7 +170,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode FFI_NATIVE_INVALID_MULTIPLE_ANNOTATIONS = FfiCode(
+  static const FfiCode ffiNativeInvalidMultipleAnnotations = FfiCode(
     'FFI_NATIVE_INVALID_MULTIPLE_ANNOTATIONS',
     "Native functions and fields must have exactly one `@Native` annotation.",
     correctionMessage: "Try removing the extra annotation.",
@@ -178,7 +178,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode FFI_NATIVE_MUST_BE_EXTERNAL = FfiCode(
+  static const FfiCode ffiNativeMustBeExternal = FfiCode(
     'FFI_NATIVE_MUST_BE_EXTERNAL',
     "Native functions must be declared external.",
     correctionMessage: "Add the `external` keyword to the function.",
@@ -187,7 +187,7 @@ class FfiCode extends DiagnosticCode {
 
   /// No parameters.
   static const FfiCode
-  FFI_NATIVE_ONLY_CLASSES_EXTENDING_NATIVEFIELDWRAPPERCLASS1_CAN_BE_POINTER = FfiCode(
+  ffiNativeOnlyClassesExtendingNativefieldwrapperclass1CanBePointer = FfiCode(
     'FFI_NATIVE_ONLY_CLASSES_EXTENDING_NATIVEFIELDWRAPPERCLASS1_CAN_BE_POINTER',
     "Only classes extending NativeFieldWrapperClass1 can be passed as Pointer.",
     correctionMessage: "Pass as Handle instead.",
@@ -196,7 +196,7 @@ class FfiCode extends DiagnosticCode {
   /// Parameters:
   /// int p0: the expected number of parameters
   /// int p1: the actual number of parameters
-  static const FfiCode FFI_NATIVE_UNEXPECTED_NUMBER_OF_PARAMETERS = FfiCode(
+  static const FfiCode ffiNativeUnexpectedNumberOfParameters = FfiCode(
     'FFI_NATIVE_UNEXPECTED_NUMBER_OF_PARAMETERS',
     "Unexpected number of Native annotation parameters. Expected {0} but has "
         "{1}.",
@@ -208,7 +208,7 @@ class FfiCode extends DiagnosticCode {
   /// int p0: the expected number of parameters
   /// int p1: the actual number of parameters
   static const FfiCode
-  FFI_NATIVE_UNEXPECTED_NUMBER_OF_PARAMETERS_WITH_RECEIVER = FfiCode(
+  ffiNativeUnexpectedNumberOfParametersWithReceiver = FfiCode(
     'FFI_NATIVE_UNEXPECTED_NUMBER_OF_PARAMETERS_WITH_RECEIVER',
     "Unexpected number of Native annotation parameters. Expected {0} but has "
         "{1}. Native instance method annotation must have receiver as first "
@@ -220,7 +220,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode FIELD_MUST_BE_EXTERNAL_IN_STRUCT = FfiCode(
+  static const FfiCode fieldMustBeExternalInStruct = FfiCode(
     'FIELD_MUST_BE_EXTERNAL_IN_STRUCT',
     "Fields of 'Struct' and 'Union' subclasses must be marked external.",
     correctionMessage: "Try adding the 'external' modifier.",
@@ -229,7 +229,7 @@ class FfiCode extends DiagnosticCode {
 
   /// Parameters:
   /// String p0: the name of the struct class
-  static const FfiCode GENERIC_STRUCT_SUBCLASS = FfiCode(
+  static const FfiCode genericStructSubclass = FfiCode(
     'GENERIC_STRUCT_SUBCLASS',
     "The class '{0}' can't extend 'Struct' or 'Union' because '{0}' is "
         "generic.",
@@ -239,7 +239,7 @@ class FfiCode extends DiagnosticCode {
 
   /// Parameters:
   /// String p0: the name of the method
-  static const FfiCode INVALID_EXCEPTION_VALUE = FfiCode(
+  static const FfiCode invalidExceptionValue = FfiCode(
     'INVALID_EXCEPTION_VALUE',
     "The method {0} can't have an exceptional return value (the second "
         "argument) when the return type of the function is either 'void', "
@@ -250,7 +250,7 @@ class FfiCode extends DiagnosticCode {
 
   /// Parameters:
   /// String p0: the type of the field
-  static const FfiCode INVALID_FIELD_TYPE_IN_STRUCT = FfiCode(
+  static const FfiCode invalidFieldTypeInStruct = FfiCode(
     'INVALID_FIELD_TYPE_IN_STRUCT',
     "Fields in struct classes can't have the type '{0}'. They can only be "
         "declared as 'int', 'double', 'Array', 'Pointer', or subtype of "
@@ -262,7 +262,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode LEAF_CALL_MUST_NOT_RETURN_HANDLE = FfiCode(
+  static const FfiCode leafCallMustNotReturnHandle = FfiCode(
     'LEAF_CALL_MUST_NOT_RETURN_HANDLE',
     "FFI leaf call can't return a 'Handle'.",
     correctionMessage: "Try changing the return type to primitive or struct.",
@@ -270,7 +270,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode LEAF_CALL_MUST_NOT_TAKE_HANDLE = FfiCode(
+  static const FfiCode leafCallMustNotTakeHandle = FfiCode(
     'LEAF_CALL_MUST_NOT_TAKE_HANDLE',
     "FFI leaf call can't take arguments of type 'Handle'.",
     correctionMessage: "Try changing the argument type to primitive or struct.",
@@ -278,7 +278,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode MISMATCHED_ANNOTATION_ON_STRUCT_FIELD = FfiCode(
+  static const FfiCode mismatchedAnnotationOnStructField = FfiCode(
     'MISMATCHED_ANNOTATION_ON_STRUCT_FIELD',
     "The annotation doesn't match the declared type of the field.",
     correctionMessage:
@@ -290,7 +290,7 @@ class FfiCode extends DiagnosticCode {
   /// Parameters:
   /// Type p0: the type that is missing a native type annotation
   /// String p1: the superclass which is extended by this field's class
-  static const FfiCode MISSING_ANNOTATION_ON_STRUCT_FIELD = FfiCode(
+  static const FfiCode missingAnnotationOnStructField = FfiCode(
     'MISSING_ANNOTATION_ON_STRUCT_FIELD',
     "Fields of type '{0}' in a subclass of '{1}' must have an annotation "
         "indicating the native type.",
@@ -300,7 +300,7 @@ class FfiCode extends DiagnosticCode {
 
   /// Parameters:
   /// String p0: the name of the method
-  static const FfiCode MISSING_EXCEPTION_VALUE = FfiCode(
+  static const FfiCode missingExceptionValue = FfiCode(
     'MISSING_EXCEPTION_VALUE',
     "The method {0} must have an exceptional return value (the second "
         "argument) when the return type of the function is neither 'void', "
@@ -310,7 +310,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode MISSING_FIELD_TYPE_IN_STRUCT = FfiCode(
+  static const FfiCode missingFieldTypeInStruct = FfiCode(
     'MISSING_FIELD_TYPE_IN_STRUCT',
     "Fields in struct classes must have an explicitly declared type of 'int', "
         "'double' or 'Pointer'.",
@@ -319,7 +319,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode MISSING_SIZE_ANNOTATION_CARRAY = FfiCode(
+  static const FfiCode missingSizeAnnotationCarray = FfiCode(
     'MISSING_SIZE_ANNOTATION_CARRAY',
     "Fields of type 'Array' must have exactly one 'Array' annotation.",
     correctionMessage:
@@ -332,7 +332,7 @@ class FfiCode extends DiagnosticCode {
   /// Object p0: the type that should be a valid dart:ffi native type.
   /// String p1: the name of the function whose invocation depends on this
   ///            relationship
-  static const FfiCode MUST_BE_A_NATIVE_FUNCTION_TYPE = FfiCode(
+  static const FfiCode mustBeANativeFunctionType = FfiCode(
     'MUST_BE_A_NATIVE_FUNCTION_TYPE',
     "The type '{0}' given to '{1}' must be a valid 'dart:ffi' native function "
         "type.",
@@ -346,7 +346,7 @@ class FfiCode extends DiagnosticCode {
   /// Type p1: the supertype that the subtype is compared to
   /// String p2: the name of the function whose invocation depends on this
   ///            relationship
-  static const FfiCode MUST_BE_A_SUBTYPE = FfiCode(
+  static const FfiCode mustBeASubtype = FfiCode(
     'MUST_BE_A_SUBTYPE',
     "The type '{0}' must be a subtype of '{1}' for '{2}'.",
     correctionMessage: "Try changing one or both of the type arguments.",
@@ -355,7 +355,7 @@ class FfiCode extends DiagnosticCode {
 
   /// Parameters:
   /// Type p0: the return type that should be 'void'.
-  static const FfiCode MUST_RETURN_VOID = FfiCode(
+  static const FfiCode mustReturnVoid = FfiCode(
     'MUST_RETURN_VOID',
     "The return type of the function passed to 'NativeCallable.listener' must "
         "be 'void' rather than '{0}'.",
@@ -365,7 +365,7 @@ class FfiCode extends DiagnosticCode {
 
   /// Parameters:
   /// Type p0: The invalid type.
-  static const FfiCode NATIVE_FIELD_INVALID_TYPE = FfiCode(
+  static const FfiCode nativeFieldInvalidType = FfiCode(
     'NATIVE_FIELD_INVALID_TYPE',
     "'{0}' is an unsupported type for native fields. Native fields only "
         "support pointers, arrays or numeric and compound types.",
@@ -376,7 +376,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode NATIVE_FIELD_MISSING_TYPE = FfiCode(
+  static const FfiCode nativeFieldMissingType = FfiCode(
     'NATIVE_FIELD_MISSING_TYPE',
     "The native type of this field could not be inferred and must be specified "
         "in the annotation.",
@@ -387,7 +387,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode NATIVE_FIELD_NOT_STATIC = FfiCode(
+  static const FfiCode nativeFieldNotStatic = FfiCode(
     'NATIVE_FIELD_NOT_STATIC',
     "Native fields must be static.",
     correctionMessage: "Try adding the modifier 'static' to this field.",
@@ -395,7 +395,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode NATIVE_FUNCTION_MISSING_TYPE = FfiCode(
+  static const FfiCode nativeFunctionMissingType = FfiCode(
     'NATIVE_FUNCTION_MISSING_TYPE',
     "The native type of this function couldn't be inferred so it must be "
         "specified in the annotation.",
@@ -406,7 +406,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode NEGATIVE_VARIABLE_DIMENSION = FfiCode(
+  static const FfiCode negativeVariableDimension = FfiCode(
     'NEGATIVE_VARIABLE_DIMENSION',
     "The variable dimension of a variable-length array must be non-negative.",
     correctionMessage: "Try using a value that is zero or greater.",
@@ -416,7 +416,7 @@ class FfiCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the name of the function, method, or constructor having type
   ///            arguments
-  static const FfiCode NON_CONSTANT_TYPE_ARGUMENT = FfiCode(
+  static const FfiCode nonConstantTypeArgument = FfiCode(
     'NON_CONSTANT_TYPE_ARGUMENT',
     "The type arguments to '{0}' must be known at compile time, so they can't "
         "be type parameters.",
@@ -426,7 +426,7 @@ class FfiCode extends DiagnosticCode {
 
   /// Parameters:
   /// Type p0: the type that should be a valid dart:ffi native type.
-  static const FfiCode NON_NATIVE_FUNCTION_TYPE_ARGUMENT_TO_POINTER = FfiCode(
+  static const FfiCode nonNativeFunctionTypeArgumentToPointer = FfiCode(
     'NON_NATIVE_FUNCTION_TYPE_ARGUMENT_TO_POINTER',
     "Can't invoke 'asFunction' because the function signature '{0}' for the "
         "pointer isn't a valid C function signature.",
@@ -437,7 +437,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode NON_POSITIVE_ARRAY_DIMENSION = FfiCode(
+  static const FfiCode nonPositiveArrayDimension = FfiCode(
     'NON_POSITIVE_ARRAY_DIMENSION',
     "Array dimensions must be positive numbers.",
     correctionMessage: "Try changing the input to a positive number.",
@@ -447,7 +447,7 @@ class FfiCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the name of the field
   /// Type p1: the type of the field
-  static const FfiCode NON_SIZED_TYPE_ARGUMENT = FfiCode(
+  static const FfiCode nonSizedTypeArgument = FfiCode(
     'NON_SIZED_TYPE_ARGUMENT',
     "The type '{1}' isn't a valid type argument for '{0}'. The type argument "
         "must be a native integer, 'Float', 'Double', 'Pointer', or subtype of "
@@ -459,7 +459,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode PACKED_ANNOTATION = FfiCode(
+  static const FfiCode packedAnnotation = FfiCode(
     'PACKED_ANNOTATION',
     "Structs must have at most one 'Packed' annotation.",
     correctionMessage: "Try removing extra 'Packed' annotations.",
@@ -467,7 +467,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode PACKED_ANNOTATION_ALIGNMENT = FfiCode(
+  static const FfiCode packedAnnotationAlignment = FfiCode(
     'PACKED_ANNOTATION_ALIGNMENT',
     "Only packing to 1, 2, 4, 8, and 16 bytes is supported.",
     correctionMessage:
@@ -476,7 +476,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode SIZE_ANNOTATION_DIMENSIONS = FfiCode(
+  static const FfiCode sizeAnnotationDimensions = FfiCode(
     'SIZE_ANNOTATION_DIMENSIONS',
     "'Array's must have an 'Array' annotation that matches the dimensions.",
     correctionMessage: "Try adjusting the arguments in the 'Array' annotation.",
@@ -486,7 +486,7 @@ class FfiCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the name of the subclass
   /// String p1: the name of the class being extended, implemented, or mixed in
-  static const FfiCode SUBTYPE_OF_STRUCT_CLASS_IN_EXTENDS = FfiCode(
+  static const FfiCode subtypeOfStructClassInExtends = FfiCode(
     'SUBTYPE_OF_STRUCT_CLASS',
     "The class '{0}' can't extend '{1}' because '{1}' is a subtype of "
         "'Struct', 'Union', or 'AbiSpecificInteger'.",
@@ -499,7 +499,7 @@ class FfiCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the name of the subclass
   /// String p1: the name of the class being extended, implemented, or mixed in
-  static const FfiCode SUBTYPE_OF_STRUCT_CLASS_IN_IMPLEMENTS = FfiCode(
+  static const FfiCode subtypeOfStructClassInImplements = FfiCode(
     'SUBTYPE_OF_STRUCT_CLASS',
     "The class '{0}' can't implement '{1}' because '{1}' is a subtype of "
         "'Struct', 'Union', or 'AbiSpecificInteger'.",
@@ -512,7 +512,7 @@ class FfiCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the name of the subclass
   /// String p1: the name of the class being extended, implemented, or mixed in
-  static const FfiCode SUBTYPE_OF_STRUCT_CLASS_IN_WITH = FfiCode(
+  static const FfiCode subtypeOfStructClassInWith = FfiCode(
     'SUBTYPE_OF_STRUCT_CLASS',
     "The class '{0}' can't mix in '{1}' because '{1}' is a subtype of "
         "'Struct', 'Union', or 'AbiSpecificInteger'.",
@@ -523,7 +523,7 @@ class FfiCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const FfiCode VARIABLE_LENGTH_ARRAY_NOT_LAST = FfiCode(
+  static const FfiCode variableLengthArrayNotLast = FfiCode(
     'VARIABLE_LENGTH_ARRAY_NOT_LAST',
     "Variable length 'Array's must only occur as the last field of Structs.",
     correctionMessage: "Try adjusting the arguments in the 'Array' annotation.",

pkg/analyzer/lib/src/dart/error/hint_codes.g.dart

@@ -31,7 +31,7 @@ class HintCode extends DiagnosticCode {
   /// plan to go through the exercise of converting it to a Warning.
   ///
   /// No parameters.
-  static const HintCode DEPRECATED_COLON_FOR_DEFAULT_VALUE = HintCode(
+  static const HintCode deprecatedColonForDefaultValue = HintCode(
     'DEPRECATED_COLON_FOR_DEFAULT_VALUE',
     "Using a colon as the separator before a default value is deprecated and "
         "will not be supported in language version 3.0 and later.",
@@ -41,7 +41,7 @@ class HintCode extends DiagnosticCode {
 
   /// Parameters:
   /// String p0: the name of the member
-  static const HintCode DEPRECATED_MEMBER_USE = HintCode(
+  static const HintCode deprecatedMemberUse = HintCode(
     'DEPRECATED_MEMBER_USE',
     "'{0}' is deprecated and shouldn't be used.",
     correctionMessage:
@@ -54,7 +54,7 @@ class HintCode extends DiagnosticCode {
   ///
   /// Parameters:
   /// String p0: the name of the member
-  static const HintCode DEPRECATED_MEMBER_USE_FROM_SAME_PACKAGE = HintCode(
+  static const HintCode deprecatedMemberUseFromSamePackage = HintCode(
     'DEPRECATED_MEMBER_USE_FROM_SAME_PACKAGE',
     "'{0}' is deprecated and shouldn't be used.",
     correctionMessage:
@@ -69,7 +69,7 @@ class HintCode extends DiagnosticCode {
   /// Object p0: the name of the member
   /// Object p1: message details
   static const HintCode
-  DEPRECATED_MEMBER_USE_FROM_SAME_PACKAGE_WITH_MESSAGE = HintCode(
+  deprecatedMemberUseFromSamePackageWithMessage = HintCode(
     'DEPRECATED_MEMBER_USE_FROM_SAME_PACKAGE',
     "'{0}' is deprecated and shouldn't be used. {1}",
     correctionMessage:
@@ -81,7 +81,7 @@ class HintCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the name of the member
   /// String p1: message details
-  static const HintCode DEPRECATED_MEMBER_USE_WITH_MESSAGE = HintCode(
+  static const HintCode deprecatedMemberUseWithMessage = HintCode(
     'DEPRECATED_MEMBER_USE',
     "'{0}' is deprecated and shouldn't be used. {1}",
     correctionMessage:
@@ -91,7 +91,7 @@ class HintCode extends DiagnosticCode {
   );
 
   /// No parameters.
-  static const HintCode IMPORT_DEFERRED_LIBRARY_WITH_LOAD_FUNCTION = HintCode(
+  static const HintCode importDeferredLibraryWithLoadFunction = HintCode(
     'IMPORT_DEFERRED_LIBRARY_WITH_LOAD_FUNCTION',
     "The imported library defines a top-level function named 'loadLibrary' "
         "that is hidden by deferring this library.",
@@ -104,7 +104,7 @@ class HintCode extends DiagnosticCode {
   /// Parameters:
   /// String p0: the URI that is not necessary
   /// String p1: the URI that makes it unnecessary
-  static const HintCode UNNECESSARY_IMPORT = HintCode(
+  static const HintCode unnecessaryImport = HintCode(
     'UNNECESSARY_IMPORT',
     "The import of '{0}' is unnecessary because all of the used elements are "
         "also provided by the import of '{1}'.",
@@ -112,6 +112,9 @@ class HintCode extends DiagnosticCode {
     hasPublishedDocs: true,
   );
 
+  @Deprecated("Please use unnecessaryImport")
+  static const HintCode UNNECESSARY_IMPORT = unnecessaryImport;
+
   /// Initialize a newly created error code to have the given [name].
   const HintCode(
     String name,

pkg/analyzer/lib/src/dart/error/todo_codes.dart

@@ -11,10 +11,10 @@ import 'package:analyzer/error/error.dart';
 /// Static helper methods and properties for working with [TodoCode]s.
 class Todo {
   static const _codes = {
-    'TODO': TodoCode.TODO,
-    'FIXME': TodoCode.FIXME,
-    'HACK': TodoCode.HACK,
-    'UNDONE': TodoCode.UNDONE,
+    'TODO': TodoCode.todo,
+    'FIXME': TodoCode.fixme,
+    'HACK': TodoCode.hack,
+    'UNDONE': TodoCode.undone,
   };
 
   /// This matches the two common Dart task styles
@@ -50,8 +50,8 @@ class Todo {
     throw UnimplementedError('Do not construct');
   }
 
-  /// Returns the TodoCode for [kind], falling back to [TodoCode.TODO].
-  static TodoCode forKind(String kind) => _codes[kind] ?? TodoCode.TODO;
+  /// Returns the TodoCode for [kind], falling back to [TodoCode.todo].
+  static TodoCode forKind(String kind) => _codes[kind] ?? TodoCode.todo;
 }
 
 /**
@@ -62,22 +62,22 @@ class TodoCode extends DiagnosticCode {
   /**
    * A standard TODO comment marked as TODO.
    */
-  static const TodoCode TODO = TodoCode('TODO');
+  static const TodoCode todo = TodoCode('TODO');
 
   /**
    * A TODO comment marked as FIXME.
    */
-  static const TodoCode FIXME = TodoCode('FIXME');
+  static const TodoCode fixme = TodoCode('FIXME');
 
   /**
    * A TODO comment marked as HACK.
    */
-  static const TodoCode HACK = TodoCode('HACK');
+  static const TodoCode hack = TodoCode('HACK');
 
   /**
    * A TODO comment marked as UNDONE.
    */
-  static const TodoCode UNDONE = TodoCode('UNDONE');
+  static const TodoCode undone = TodoCode('UNDONE');
 
   /**
    * Initialize a newly created error code to have the given [name].

pkg/analyzer/lib/src/dart/resolver/annotation_resolver.dart

@@ -93,7 +93,7 @@ class AnnotationResolver {
       );
       _resolveAnnotationElementGetter(node, getter);
     } else if (getter is! ConstructorElement) {
-      _diagnosticReporter.atNode(node, CompileTimeErrorCode.INVALID_ANNOTATION);
+      _diagnosticReporter.atNode(node, CompileTimeErrorCode.invalidAnnotation);
     }
 
     _visitArguments(
@@ -117,7 +117,7 @@ class AnnotationResolver {
     node.element = constructorElement;
 
     if (constructorElement == null) {
-      _diagnosticReporter.atNode(node, CompileTimeErrorCode.INVALID_ANNOTATION);
+      _diagnosticReporter.atNode(node, CompileTimeErrorCode.invalidAnnotation);
       AnnotationInferrer(
         resolver: _resolver,
         node: node,
@@ -172,7 +172,7 @@ class AnnotationResolver {
       );
       _resolveAnnotationElementGetter(node, getter);
     } else {
-      _diagnosticReporter.atNode(node, CompileTimeErrorCode.INVALID_ANNOTATION);
+      _diagnosticReporter.atNode(node, CompileTimeErrorCode.invalidAnnotation);
     }
 
     _visitArguments(
@@ -188,7 +188,7 @@ class AnnotationResolver {
     List<WhyNotPromotedGetter> whyNotPromotedArguments,
   ) {
     if (!element.isConst || node.arguments != null) {
-      _diagnosticReporter.atNode(node, CompileTimeErrorCode.INVALID_ANNOTATION);
+      _diagnosticReporter.atNode(node, CompileTimeErrorCode.invalidAnnotation);
     }
 
     _visitArguments(
@@ -239,7 +239,7 @@ class AnnotationResolver {
     if (element1 == null) {
       _diagnosticReporter.atNode(
         node,
-        CompileTimeErrorCode.UNDEFINED_ANNOTATION,
+        CompileTimeErrorCode.undefinedAnnotation,
         arguments: [name1.name],
       );
       _visitArguments(
@@ -331,7 +331,7 @@ class AnnotationResolver {
         if (element == null) {
           _diagnosticReporter.atNode(
             node,
-            CompileTimeErrorCode.UNDEFINED_ANNOTATION,
+            CompileTimeErrorCode.undefinedAnnotation,
             arguments: [name2.name],
           );
           _visitArguments(
@@ -375,7 +375,7 @@ class AnnotationResolver {
       return;
     }
 
-    _diagnosticReporter.atNode(node, CompileTimeErrorCode.INVALID_ANNOTATION);
+    _diagnosticReporter.atNode(node, CompileTimeErrorCode.invalidAnnotation);
 
     _visitArguments(
       node,
@@ -395,7 +395,7 @@ class AnnotationResolver {
         annotation.arguments != null) {
       _diagnosticReporter.atNode(
         annotation,
-        CompileTimeErrorCode.INVALID_ANNOTATION,
+        CompileTimeErrorCode.invalidAnnotation,
       );
     }
   }
@@ -459,7 +459,7 @@ class AnnotationResolver {
       );
       _resolveAnnotationElementGetter(node, getter);
     } else if (getter is! ConstructorElement) {
-      _diagnosticReporter.atNode(node, CompileTimeErrorCode.INVALID_ANNOTATION);
+      _diagnosticReporter.atNode(node, CompileTimeErrorCode.invalidAnnotation);
     }
 
     _visitArguments(

pkg/analyzer/lib/src/dart/resolver/assignment_expression_resolver.dart

@@ -152,7 +152,7 @@ class AssignmentExpressionResolver {
       )) {
         _diagnosticReporter.atNode(
           right,
-          CompileTimeErrorCode.RECORD_LITERAL_ONE_POSITIONAL_NO_TRAILING_COMMA,
+          CompileTimeErrorCode.recordLiteralOnePositionalNoTrailingComma,
         );
         return;
       }
@@ -160,7 +160,7 @@ class AssignmentExpressionResolver {
 
     _diagnosticReporter.atNode(
       right,
-      CompileTimeErrorCode.INVALID_ASSIGNMENT,
+      CompileTimeErrorCode.invalidAssignment,
       arguments: [rightType, writeType],
       contextMessages: _resolver.computeWhyNotPromotedMessages(
         right,
@@ -173,7 +173,7 @@ class AssignmentExpressionResolver {
   /// when it returns 'void'. Or, in rare cases, when other types of expressions
   /// are void, such as identifiers.
   ///
-  /// See [CompileTimeErrorCode.USE_OF_VOID_RESULT].
+  /// See [CompileTimeErrorCode.useOfVoidResult].
   // TODO(scheglov): this is duplicate
   bool _checkForUseOfVoidResult(Expression expression) {
     if (!identical(expression.staticType, VoidTypeImpl.instance)) {
@@ -184,12 +184,12 @@ class AssignmentExpressionResolver {
       SimpleIdentifier methodName = expression.methodName;
       _diagnosticReporter.atNode(
         methodName,
-        CompileTimeErrorCode.USE_OF_VOID_RESULT,
+        CompileTimeErrorCode.useOfVoidResult,
       );
     } else {
       _diagnosticReporter.atNode(
         expression,
-        CompileTimeErrorCode.USE_OF_VOID_RESULT,
+        CompileTimeErrorCode.useOfVoidResult,
       );
     }
 
@@ -242,7 +242,7 @@ class AssignmentExpressionResolver {
       if (leftType is VoidType) {
         _diagnosticReporter.atToken(
           operator,
-          CompileTimeErrorCode.USE_OF_VOID_RESULT,
+          CompileTimeErrorCode.useOfVoidResult,
         );
         return;
       }
@@ -274,7 +274,7 @@ class AssignmentExpressionResolver {
     if (result.needsGetterError) {
       _diagnosticReporter.atToken(
         operator,
-        CompileTimeErrorCode.UNDEFINED_OPERATOR,
+        CompileTimeErrorCode.undefinedOperator,
         arguments: [methodName, leftType],
       );
     }
@@ -402,14 +402,14 @@ class AssignmentExpressionShared {
             if (isForEachIdentifier || assigned) {
               _errorReporter.atNode(
                 left,
-                CompileTimeErrorCode.LATE_FINAL_LOCAL_ALREADY_ASSIGNED,
+                CompileTimeErrorCode.lateFinalLocalAlreadyAssigned,
               );
             }
           } else {
             if (isForEachIdentifier || !unassigned) {
               _errorReporter.atNode(
                 left,
-                CompileTimeErrorCode.ASSIGNMENT_TO_FINAL_LOCAL,
+                CompileTimeErrorCode.assignmentToFinalLocal,
                 arguments: [element.name!],
               );
             }

pkg/analyzer/lib/src/dart/resolver/ast_rewrite.dart

@@ -435,7 +435,7 @@ class AstRewriter {
     if (typeArguments != null) {
       _diagnosticReporter.atNode(
         typeArguments,
-        CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_CONSTRUCTOR,
+        CompileTimeErrorCode.wrongNumberOfTypeArgumentsConstructor,
         arguments: [typeNameIdentifier.toString(), constructorIdentifier.name],
       );
     }
@@ -602,7 +602,7 @@ class AstRewriter {
     if (typeArguments != null) {
       _diagnosticReporter.atNode(
         typeArguments,
-        CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_CONSTRUCTOR,
+        CompileTimeErrorCode.wrongNumberOfTypeArgumentsConstructor,
         arguments: [typeIdentifier.name, constructorIdentifier.name],
       );
     }

pkg/analyzer/lib/src/dart/resolver/binary_expression_resolver.dart

@@ -70,7 +70,7 @@ class BinaryExpressionResolver {
     if (operator != TokenType.BANG_EQ_EQ && operator != TokenType.EQ_EQ_EQ) {
       _diagnosticReporter.atToken(
         node.operator,
-        CompileTimeErrorCode.NOT_BINARY_OPERATOR,
+        CompileTimeErrorCode.notBinaryOperator,
         arguments: [operator.lexeme],
       );
     }
@@ -85,7 +85,7 @@ class BinaryExpressionResolver {
   }) {
     _resolver.boolExpressionVerifier.checkForNonBoolExpression(
       operand,
-      diagnosticCode: CompileTimeErrorCode.NON_BOOL_OPERAND,
+      diagnosticCode: CompileTimeErrorCode.nonBoolOperand,
       arguments: [operator],
       whyNotPromoted: whyNotPromoted,
     );
@@ -148,8 +148,8 @@ class BinaryExpressionResolver {
     void reportNullComparison(SyntacticEntity start, SyntacticEntity end) {
       var errorCode =
           notEqual
-              ? WarningCode.UNNECESSARY_NULL_COMPARISON_ALWAYS_NULL_FALSE
-              : WarningCode.UNNECESSARY_NULL_COMPARISON_ALWAYS_NULL_TRUE;
+              ? WarningCode.unnecessaryNullComparisonAlwaysNullFalse
+              : WarningCode.unnecessaryNullComparisonAlwaysNullTrue;
       var offset = start.offset;
       _diagnosticReporter.atOffset(
         offset: offset,
@@ -407,7 +407,7 @@ class BinaryExpressionResolver {
         // safe to assume `extension.name` is non-`null`.
         _diagnosticReporter.atToken(
           node.operator,
-          CompileTimeErrorCode.UNDEFINED_EXTENSION_OPERATOR,
+          CompileTimeErrorCode.undefinedExtensionOperator,
           arguments: [methodName, extension.name!],
         );
       }
@@ -421,7 +421,7 @@ class BinaryExpressionResolver {
     if (identical(leftType, NeverTypeImpl.instance)) {
       _resolver.diagnosticReporter.atNode(
         leftOperand,
-        WarningCode.RECEIVER_OF_TYPE_NEVER,
+        WarningCode.receiverOfTypeNever,
       );
       return;
     }
@@ -446,13 +446,13 @@ class BinaryExpressionResolver {
       if (leftOperand is SuperExpression) {
         _diagnosticReporter.atToken(
           node.operator,
-          CompileTimeErrorCode.UNDEFINED_SUPER_OPERATOR,
+          CompileTimeErrorCode.undefinedSuperOperator,
           arguments: [methodName, leftType],
         );
       } else {
         _diagnosticReporter.atToken(
           node.operator,
-          CompileTimeErrorCode.UNDEFINED_OPERATOR,
+          CompileTimeErrorCode.undefinedOperator,
           arguments: [methodName, leftType],
         );
       }

pkg/analyzer/lib/src/dart/resolver/constructor_reference_resolver.dart

@@ -25,7 +25,7 @@ class ConstructorReferenceResolver {
       // the parser has already reported an error.
       _resolver.diagnosticReporter.atNode(
         node,
-        WarningCode.SDK_VERSION_CONSTRUCTOR_TEAROFFS,
+        WarningCode.sdkVersionConstructorTearoffs,
       );
     }
     node.constructorName.accept(_resolver);
@@ -35,8 +35,7 @@ class ConstructorReferenceResolver {
       if (enclosingElement is ClassElementImpl && enclosingElement.isAbstract) {
         _resolver.diagnosticReporter.atNode(
           node,
-          CompileTimeErrorCode
-              .TEAROFF_OF_GENERATIVE_CONSTRUCTOR_OF_ABSTRACT_CLASS,
+          CompileTimeErrorCode.tearoffOfGenerativeConstructorOfAbstractClass,
         );
       }
     }
@@ -68,10 +67,9 @@ class ConstructorReferenceResolver {
         if (method != null) {
           var error =
               method.isStatic
-                  ? CompileTimeErrorCode
-                      .CLASS_INSTANTIATION_ACCESS_TO_STATIC_MEMBER
+                  ? CompileTimeErrorCode.classInstantiationAccessToStaticMember
                   : CompileTimeErrorCode
-                      .CLASS_INSTANTIATION_ACCESS_TO_INSTANCE_MEMBER;
+                      .classInstantiationAccessToInstanceMember;
           _resolver.diagnosticReporter.atNode(
             node,
             error,
@@ -80,7 +78,7 @@ class ConstructorReferenceResolver {
         } else if (!name.isSynthetic) {
           _resolver.diagnosticReporter.atNode(
             node,
-            CompileTimeErrorCode.CLASS_INSTANTIATION_ACCESS_TO_UNKNOWN_MEMBER,
+            CompileTimeErrorCode.classInstantiationAccessToUnknownMember,
             arguments: [enclosingElement.name!, name.name],
           );
         }

pkg/analyzer/lib/src/dart/resolver/extension_member_resolver.dart

@@ -118,7 +118,7 @@ class ExtensionMemberResolver {
     if (mostSpecific.length == 2) {
       _diagnosticReporter.atEntity(
         nameEntity,
-        CompileTimeErrorCode.AMBIGUOUS_EXTENSION_MEMBER_ACCESS_TWO,
+        CompileTimeErrorCode.ambiguousExtensionMemberAccessTwo,
         arguments: [
           name.name,
           mostSpecific[0].extension,
@@ -129,7 +129,7 @@ class ExtensionMemberResolver {
       var extensions = mostSpecific.map((e) => e.extension).toList();
       _diagnosticReporter.atEntity(
         nameEntity,
-        CompileTimeErrorCode.AMBIGUOUS_EXTENSION_MEMBER_ACCESS_THREE_OR_MORE,
+        CompileTimeErrorCode.ambiguousExtensionMemberAccessThreeOrMore,
         arguments: [
           name.name,
           mostSpecific.map((e) {
@@ -207,7 +207,7 @@ class ExtensionMemberResolver {
       if (!_isCascadeTarget(node)) {
         _diagnosticReporter.atNode(
           node,
-          CompileTimeErrorCode.EXTENSION_OVERRIDE_WITHOUT_ACCESS,
+          CompileTimeErrorCode.extensionOverrideWithoutAccess,
         );
       }
       nodeImpl.setPseudoExpressionStaticType(DynamicTypeImpl.instance);
@@ -217,7 +217,7 @@ class ExtensionMemberResolver {
     if (arguments.length != 1) {
       _diagnosticReporter.atNode(
         node.argumentList,
-        CompileTimeErrorCode.INVALID_EXTENSION_ARGUMENT_COUNT,
+        CompileTimeErrorCode.invalidExtensionArgumentCount,
       );
       nodeImpl.typeArgumentTypes = _listOfDynamic(typeParameters);
       nodeImpl.extendedType = DynamicTypeImpl.instance;
@@ -260,7 +260,7 @@ class ExtensionMemberResolver {
     if (receiverType is VoidType) {
       _diagnosticReporter.atNode(
         receiverExpression,
-        CompileTimeErrorCode.USE_OF_VOID_RESULT,
+        CompileTimeErrorCode.useOfVoidResult,
       );
     } else if (!_typeSystem.isAssignableTo(
       receiverType,
@@ -271,7 +271,7 @@ class ExtensionMemberResolver {
           whyNotPromotedArguments.isEmpty ? null : whyNotPromotedArguments[0];
       _diagnosticReporter.atNode(
         receiverExpression,
-        CompileTimeErrorCode.EXTENSION_OVERRIDE_ARGUMENT_NOT_ASSIGNABLE,
+        CompileTimeErrorCode.extensionOverrideArgumentNotAssignable,
         arguments: [receiverType, extendedType],
         contextMessages: _resolver.computeWhyNotPromotedMessages(
           receiverExpression,
@@ -298,7 +298,7 @@ class ExtensionMemberResolver {
           if (!_typeSystem.isSubtypeOf(argument, parameterBound)) {
             _diagnosticReporter.atNode(
               typeArgumentList.arguments[i],
-              CompileTimeErrorCode.TYPE_ARGUMENT_NOT_MATCHING_BOUNDS,
+              CompileTimeErrorCode.typeArgumentNotMatchingBounds,
               arguments: [argument, name, parameterBound],
             );
           }
@@ -381,7 +381,7 @@ class ExtensionMemberResolver {
         // explicit extension overrides cannot refer to unnamed extensions.
         _diagnosticReporter.atNode(
           typeArguments,
-          CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_EXTENSION,
+          CompileTimeErrorCode.wrongNumberOfTypeArgumentsExtension,
           arguments: [element.name!, typeParameters.length, arguments.length],
         );
         return _listOfDynamic(typeParameters);

pkg/analyzer/lib/src/dart/resolver/for_resolver.dart

@@ -85,7 +85,7 @@ class ForResolver {
     );
     _resolver.popRewrite();
     _resolver.nullableDereferenceVerifier.expression(
-      CompileTimeErrorCode.UNCHECKED_USE_OF_NULLABLE_VALUE_AS_ITERATOR,
+      CompileTimeErrorCode.uncheckedUseOfNullableValueAsIterator,
       forLoopParts.iterable,
     );
   }
@@ -177,7 +177,7 @@ class ForResolver {
     iterable = _resolver.popRewrite()!;
 
     _resolver.nullableDereferenceVerifier.expression(
-      CompileTimeErrorCode.UNCHECKED_USE_OF_NULLABLE_VALUE_AS_ITERATOR,
+      CompileTimeErrorCode.uncheckedUseOfNullableValueAsIterator,
       iterable,
     );
 

pkg/analyzer/lib/src/dart/resolver/function_expression_invocation_resolver.dart

@@ -65,7 +65,7 @@ class FunctionExpressionInvocationResolver {
     receiverType = _typeSystem.resolveToBound(receiverType);
     if (receiverType is FunctionTypeImpl) {
       _nullableDereferenceVerifier.expression(
-        CompileTimeErrorCode.UNCHECKED_INVOCATION_OF_NULLABLE_VALUE,
+        CompileTimeErrorCode.uncheckedInvocationOfNullableValue,
         function,
       );
       _resolve(
@@ -78,7 +78,7 @@ class FunctionExpressionInvocationResolver {
     }
 
     if (identical(receiverType, NeverTypeImpl.instance)) {
-      _diagnosticReporter.atNode(function, WarningCode.RECEIVER_OF_TYPE_NEVER);
+      _diagnosticReporter.atNode(function, WarningCode.receiverOfTypeNever);
       _unresolved(
         node,
         NeverTypeImpl.instance,
@@ -103,7 +103,7 @@ class FunctionExpressionInvocationResolver {
       if (result.needsGetterError) {
         _diagnosticReporter.atNode(
           function,
-          CompileTimeErrorCode.INVOCATION_OF_NON_FUNCTION_EXPRESSION,
+          CompileTimeErrorCode.invocationOfNonFunctionExpression,
         );
       }
       var type =
@@ -122,7 +122,7 @@ class FunctionExpressionInvocationResolver {
     if (callElement.kind != ElementKind.METHOD) {
       _diagnosticReporter.atNode(
         function,
-        CompileTimeErrorCode.INVOCATION_OF_NON_FUNCTION_EXPRESSION,
+        CompileTimeErrorCode.invocationOfNonFunctionExpression,
       );
       _unresolved(
         node,
@@ -142,7 +142,7 @@ class FunctionExpressionInvocationResolver {
   /// when it returns 'void'. Or, in rare cases, when other types of expressions
   /// are void, such as identifiers.
   ///
-  /// See [CompileTimeErrorCode.USE_OF_VOID_RESULT].
+  /// See [CompileTimeErrorCode.useOfVoidResult].
   ///
   // TODO(scheglov): this is duplicate
   bool _checkForUseOfVoidResult(Expression expression, DartType type) {
@@ -154,12 +154,12 @@ class FunctionExpressionInvocationResolver {
       SimpleIdentifier methodName = expression.methodName;
       _diagnosticReporter.atNode(
         methodName,
-        CompileTimeErrorCode.USE_OF_VOID_RESULT,
+        CompileTimeErrorCode.useOfVoidResult,
       );
     } else {
       _diagnosticReporter.atNode(
         expression,
-        CompileTimeErrorCode.USE_OF_VOID_RESULT,
+        CompileTimeErrorCode.useOfVoidResult,
       );
     }
 
@@ -203,7 +203,7 @@ class FunctionExpressionInvocationResolver {
     if (callElement == null) {
       _diagnosticReporter.atNode(
         function,
-        CompileTimeErrorCode.INVOCATION_OF_EXTENSION_WITHOUT_CALL,
+        CompileTimeErrorCode.invocationOfExtensionWithoutCall,
         arguments: [function.name.lexeme],
       );
       return _unresolved(
@@ -217,7 +217,7 @@ class FunctionExpressionInvocationResolver {
     if (callElement.isStatic) {
       _diagnosticReporter.atNode(
         node.argumentList,
-        CompileTimeErrorCode.EXTENSION_OVERRIDE_ACCESS_TO_STATIC_MEMBER,
+        CompileTimeErrorCode.extensionOverrideAccessToStaticMember,
       );
     }
 

pkg/analyzer/lib/src/dart/resolver/function_reference_resolver.dart

@@ -57,7 +57,7 @@ class FunctionReferenceResolver {
         // interpreted as a type literal (e.g. `List<int>`).
         _diagnosticReporter.atNode(
           typeArguments,
-          CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_CONSTRUCTOR,
+          CompileTimeErrorCode.wrongNumberOfTypeArgumentsConstructor,
           arguments: [
             function.constructorName.type.qualifiedName,
             function.constructorName.name!.name,
@@ -105,7 +105,7 @@ class FunctionReferenceResolver {
     if (prefixType is DynamicType) {
       _diagnosticReporter.atNode(
         function,
-        CompileTimeErrorCode.GENERIC_METHOD_TYPE_INSTANTIATION_ON_DYNAMIC,
+        CompileTimeErrorCode.genericMethodTypeInstantiationOnDynamic,
       );
       node.recordStaticType(InvalidTypeImpl.instance, resolver: _resolver);
       return true;
@@ -122,10 +122,9 @@ class FunctionReferenceResolver {
     if (typeArgumentList.arguments.length != typeParameters.length) {
       if (name == null &&
           errorCode ==
-              CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_FUNCTION) {
+              CompileTimeErrorCode.wrongNumberOfTypeArgumentsFunction) {
         errorCode =
-            CompileTimeErrorCode
-                .WRONG_NUMBER_OF_TYPE_ARGUMENTS_ANONYMOUS_FUNCTION;
+            CompileTimeErrorCode.wrongNumberOfTypeArgumentsAnonymousFunction;
         _diagnosticReporter.atNode(
           typeArgumentList,
           errorCode,
@@ -188,14 +187,13 @@ class FunctionReferenceResolver {
       if (_resolver.enclosingExtension != null) {
         _resolver.diagnosticReporter.atNode(
           nameNode,
-          CompileTimeErrorCode
-              .UNQUALIFIED_REFERENCE_TO_STATIC_MEMBER_OF_EXTENDED_TYPE,
+          CompileTimeErrorCode.unqualifiedReferenceToStaticMemberOfExtendedType,
           arguments: [enclosingElement.displayName],
         );
       } else {
         _resolver.diagnosticReporter.atNode(
           nameNode,
-          CompileTimeErrorCode.UNQUALIFIED_REFERENCE_TO_NON_LOCAL_STATIC_MEMBER,
+          CompileTimeErrorCode.unqualifiedReferenceToNonLocalStaticMember,
           arguments: [enclosingElement.displayName],
         );
       }
@@ -203,8 +201,7 @@ class FunctionReferenceResolver {
         enclosingElement.name == null) {
       _resolver.diagnosticReporter.atNode(
         nameNode,
-        CompileTimeErrorCode
-            .INSTANCE_ACCESS_TO_STATIC_MEMBER_OF_UNNAMED_EXTENSION,
+        CompileTimeErrorCode.instanceAccessToStaticMemberOfUnnamedExtension,
         arguments: [nameNode.name, element.kind.displayName],
       );
     } else {
@@ -212,7 +209,7 @@ class FunctionReferenceResolver {
       // it can only be `null` for extensions, and we handle that case above.
       _resolver.diagnosticReporter.atNode(
         nameNode,
-        CompileTimeErrorCode.INSTANCE_ACCESS_TO_STATIC_MEMBER,
+        CompileTimeErrorCode.instanceAccessToStaticMember,
         arguments: [
           nameNode.name,
           element.kind.displayName,
@@ -264,7 +261,7 @@ class FunctionReferenceResolver {
             typeArguments,
             name,
             rawType.typeParameters,
-            CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_FUNCTION,
+            CompileTimeErrorCode.wrongNumberOfTypeArgumentsFunction,
           );
 
           var invokeType = rawType.instantiate(typeArgumentTypes);
@@ -278,7 +275,7 @@ class FunctionReferenceResolver {
         // tearoff feature is enabled.
         _diagnosticReporter.atNode(
           node.function,
-          CompileTimeErrorCode.DISALLOWED_TYPE_INSTANTIATION_EXPRESSION,
+          CompileTimeErrorCode.disallowedTypeInstantiationExpression,
         );
         node.recordStaticType(InvalidTypeImpl.instance, resolver: _resolver);
       } else if (rawType is DynamicType) {
@@ -300,7 +297,7 @@ class FunctionReferenceResolver {
       node.typeArguments!,
       MethodElement.CALL_METHOD_NAME,
       callMethodType.typeParameters,
-      CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_FUNCTION,
+      CompileTimeErrorCode.wrongNumberOfTypeArgumentsFunction,
     );
     var callReference = ImplicitCallReferenceImpl(
       expression: node.function,
@@ -331,7 +328,7 @@ class FunctionReferenceResolver {
       node.typeArguments!,
       name.name,
       element.typeParameters,
-      CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS,
+      CompileTimeErrorCode.wrongNumberOfTypeArguments,
     );
     var type = element.instantiateImpl(
       typeArguments: typeArguments,
@@ -353,7 +350,7 @@ class FunctionReferenceResolver {
       // tearoff feature is enabled.
       _diagnosticReporter.atNode(
         node.function,
-        CompileTimeErrorCode.DISALLOWED_TYPE_INSTANTIATION_EXPRESSION,
+        CompileTimeErrorCode.disallowedTypeInstantiationExpression,
       );
     }
     _resolve(node: node, rawType: rawType);
@@ -379,7 +376,7 @@ class FunctionReferenceResolver {
     if (member.isStatic) {
       _resolver.diagnosticReporter.atNode(
         function.propertyName,
-        CompileTimeErrorCode.EXTENSION_OVERRIDE_ACCESS_TO_STATIC_MEMBER,
+        CompileTimeErrorCode.extensionOverrideAccessToStaticMember,
       );
       // Continue to resolve type.
     }
@@ -387,7 +384,7 @@ class FunctionReferenceResolver {
     if (function.isCascaded) {
       _resolver.diagnosticReporter.atToken(
         override.name,
-        CompileTimeErrorCode.EXTENSION_OVERRIDE_WITH_CASCADE,
+        CompileTimeErrorCode.extensionOverrideWithCascade,
       );
       // Continue to resolve type.
     }
@@ -441,7 +438,7 @@ class FunctionReferenceResolver {
     if (prefixElement == null) {
       _diagnosticReporter.atNode(
         function.prefix,
-        CompileTimeErrorCode.UNDEFINED_IDENTIFIER,
+        CompileTimeErrorCode.undefinedIdentifier,
         arguments: [function.name],
       );
       function.setPseudoExpressionStaticType(InvalidTypeImpl.instance);
@@ -465,7 +462,7 @@ class FunctionReferenceResolver {
       if (functionElement == null) {
         _diagnosticReporter.atNode(
           function.identifier,
-          CompileTimeErrorCode.UNDEFINED_PREFIXED_NAME,
+          CompileTimeErrorCode.undefinedPrefixedName,
           arguments: [functionName, function.prefix.name],
         );
         function.setPseudoExpressionStaticType(InvalidTypeImpl.instance);
@@ -510,7 +507,7 @@ class FunctionReferenceResolver {
       // If it is known, we must report the bad type instantiation here.
       _diagnosticReporter.atNode(
         function.identifier,
-        CompileTimeErrorCode.DISALLOWED_TYPE_INSTANTIATION_EXPRESSION,
+        CompileTimeErrorCode.disallowedTypeInstantiationExpression,
       );
     }
     _resolver.analyzeExpression(function, _resolver.operations.unknownType);
@@ -555,7 +552,7 @@ class FunctionReferenceResolver {
       if (targetType is DynamicType) {
         _diagnosticReporter.atNode(
           node,
-          CompileTimeErrorCode.GENERIC_METHOD_TYPE_INSTANTIATION_ON_DYNAMIC,
+          CompileTimeErrorCode.genericMethodTypeInstantiationOnDynamic,
         );
         node.recordStaticType(InvalidTypeImpl.instance, resolver: _resolver);
         return;
@@ -582,7 +579,7 @@ class FunctionReferenceResolver {
         // If it is known, we must report the bad type instantiation here.
         _diagnosticReporter.atNode(
           function.propertyName,
-          CompileTimeErrorCode.DISALLOWED_TYPE_INSTANTIATION_EXPRESSION,
+          CompileTimeErrorCode.disallowedTypeInstantiationExpression,
         );
       }
 
@@ -703,7 +700,7 @@ class FunctionReferenceResolver {
         } else {
           _diagnosticReporter.atNode(
             function,
-            CompileTimeErrorCode.UNDEFINED_IDENTIFIER,
+            CompileTimeErrorCode.undefinedIdentifier,
             arguments: [function.name],
           );
           function.setPseudoExpressionStaticType(InvalidTypeImpl.instance);
@@ -747,7 +744,7 @@ class FunctionReferenceResolver {
       } else {
         _resolver.diagnosticReporter.atNode(
           function,
-          CompileTimeErrorCode.UNDEFINED_METHOD,
+          CompileTimeErrorCode.undefinedMethod,
           arguments: [function.name, receiverType],
         );
         function.setPseudoExpressionStaticType(InvalidTypeImpl.instance);
@@ -862,7 +859,7 @@ class FunctionReferenceResolver {
       node.typeArguments!,
       element.name,
       element.typeParameters,
-      CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS,
+      CompileTimeErrorCode.wrongNumberOfTypeArguments,
     );
     var type = element.instantiateImpl(
       typeArguments: typeArguments,

pkg/analyzer/lib/src/dart/resolver/instance_creation_expression_resolver.dart

@@ -86,7 +86,7 @@ class InstanceCreationExpressionResolver {
         } else {
           _resolver.diagnosticReporter.atNode(
             node.constructorName,
-            CompileTimeErrorCode.CONST_WITH_UNDEFINED_CONSTRUCTOR,
+            CompileTimeErrorCode.constWithUndefinedConstructor,
             arguments: [contextType, node.constructorName.name],
           );
         }
@@ -98,14 +98,14 @@ class InstanceCreationExpressionResolver {
         if (constructorElement != null && !constructorElement.isFactory) {
           _resolver.diagnosticReporter.atNode(
             node,
-            CompileTimeErrorCode.INSTANTIATE_ABSTRACT_CLASS,
+            CompileTimeErrorCode.instantiateAbstractClass,
           );
         }
       } else if (typeArguments != null) {
         _resolver.diagnosticReporter.atNode(
           typeArguments,
           CompileTimeErrorCode
-              .WRONG_NUMBER_OF_TYPE_ARGUMENTS_DOT_SHORTHAND_CONSTRUCTOR,
+              .wrongNumberOfTypeArgumentsDotShorthandConstructor,
           arguments: [
             dotShorthandContextType.getDisplayString(),
             node.constructorName.name,
@@ -115,7 +115,7 @@ class InstanceCreationExpressionResolver {
     } else {
       _resolver.diagnosticReporter.atNode(
         node,
-        CompileTimeErrorCode.DOT_SHORTHAND_MISSING_CONTEXT,
+        CompileTimeErrorCode.dotShorthandMissingContext,
       );
     }
 

pkg/analyzer/lib/src/dart/resolver/invocation_inferrer.dart

@@ -88,7 +88,7 @@ class AnnotationInferrer extends FullInvocationInferrer<AnnotationImpl> {
 
   @override
   DiagnosticCode get _wrongNumberOfTypeArgumentsErrorCode =>
-      CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS;
+      CompileTimeErrorCode.wrongNumberOfTypeArguments;
 
   @override
   List<FormalParameterElement>? _storeResult(
@@ -197,7 +197,7 @@ abstract class FullInvocationInferrer<Node extends AstNodeImpl>
   TypeArgumentListImpl? get _typeArguments;
 
   DiagnosticCode get _wrongNumberOfTypeArgumentsErrorCode =>
-      CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_METHOD;
+      CompileTimeErrorCode.wrongNumberOfTypeArgumentsMethod;
 
   @override
   DartType resolveInvocation({required FunctionTypeImpl? rawType}) {
@@ -252,7 +252,7 @@ abstract class FullInvocationInferrer<Node extends AstNodeImpl>
               if (!resolver.typeSystem.isSubtypeOf(typeArgument, bound)) {
                 resolver.diagnosticReporter.atNode(
                   typeArgumentList.arguments[i],
-                  CompileTimeErrorCode.TYPE_ARGUMENT_NOT_MATCHING_BOUNDS,
+                  CompileTimeErrorCode.typeArgumentNotMatchingBounds,
                   arguments: [typeArgument, typeParameter.name!, bound],
                 );
               }

pkg/analyzer/lib/src/dart/resolver/list_pattern_resolver.dart

@@ -26,7 +26,7 @@ class ListPatternResolver {
       if (length != 1) {
         resolverVisitor.diagnosticReporter.atNode(
           typeArguments,
-          CompileTimeErrorCode.EXPECTED_ONE_LIST_PATTERN_TYPE_ARGUMENTS,
+          CompileTimeErrorCode.expectedOneListPatternTypeArguments,
           arguments: [length],
         );
       }

pkg/analyzer/lib/src/dart/resolver/method_invocation_resolver.dart

@@ -227,7 +227,7 @@ class MethodInvocationResolver with ScopeHelpers {
       // of a function type).
       _resolver.diagnosticReporter.atNode(
         nameNode,
-        CompileTimeErrorCode.UNDEFINED_METHOD_ON_FUNCTION_TYPE,
+        CompileTimeErrorCode.undefinedMethodOnFunctionType,
         arguments: [name, receiver.type.qualifiedName],
       );
       _setInvalidTypeResolution(
@@ -286,7 +286,7 @@ class MethodInvocationResolver with ScopeHelpers {
 
     _resolver.diagnosticReporter.atNode(
       node.memberName,
-      CompileTimeErrorCode.DOT_SHORTHAND_UNDEFINED_INVOCATION,
+      CompileTimeErrorCode.dotShorthandUndefinedInvocation,
       arguments: [node.memberName.name, contextType.getDisplayString()],
     );
     _setInvalidTypeResolutionForDotShorthand(
@@ -321,14 +321,13 @@ class MethodInvocationResolver with ScopeHelpers {
       if (_resolver.enclosingExtension != null) {
         _resolver.diagnosticReporter.atNode(
           nameNode,
-          CompileTimeErrorCode
-              .UNQUALIFIED_REFERENCE_TO_STATIC_MEMBER_OF_EXTENDED_TYPE,
+          CompileTimeErrorCode.unqualifiedReferenceToStaticMemberOfExtendedType,
           arguments: [enclosingElement.displayString()],
         );
       } else {
         _resolver.diagnosticReporter.atNode(
           nameNode,
-          CompileTimeErrorCode.UNQUALIFIED_REFERENCE_TO_NON_LOCAL_STATIC_MEMBER,
+          CompileTimeErrorCode.unqualifiedReferenceToNonLocalStaticMember,
           arguments: [enclosingElement.displayString()],
         );
       }
@@ -336,8 +335,7 @@ class MethodInvocationResolver with ScopeHelpers {
         enclosingElement.name == null) {
       _resolver.diagnosticReporter.atNode(
         nameNode,
-        CompileTimeErrorCode
-            .INSTANCE_ACCESS_TO_STATIC_MEMBER_OF_UNNAMED_EXTENSION,
+        CompileTimeErrorCode.instanceAccessToStaticMemberOfUnnamedExtension,
         arguments: [nameNode.name, element.kind.displayName],
       );
     } else {
@@ -345,7 +343,7 @@ class MethodInvocationResolver with ScopeHelpers {
       // it can only be `null` for extensions, and we handle that case above.
       _resolver.diagnosticReporter.atNode(
         nameNode,
-        CompileTimeErrorCode.INSTANCE_ACCESS_TO_STATIC_MEMBER,
+        CompileTimeErrorCode.instanceAccessToStaticMember,
         arguments: [
           nameNode.name,
           element.kind.displayName,
@@ -361,7 +359,7 @@ class MethodInvocationResolver with ScopeHelpers {
   void _reportInvocationOfNonFunction(SimpleIdentifierImpl methodName) {
     _resolver.diagnosticReporter.atNode(
       methodName,
-      CompileTimeErrorCode.INVOCATION_OF_NON_FUNCTION,
+      CompileTimeErrorCode.invocationOfNonFunction,
       arguments: [methodName.name],
     );
   }
@@ -369,7 +367,7 @@ class MethodInvocationResolver with ScopeHelpers {
   void _reportPrefixIdentifierNotFollowedByDot(SimpleIdentifier target) {
     _resolver.diagnosticReporter.atNode(
       target,
-      CompileTimeErrorCode.PREFIX_IDENTIFIER_NOT_FOLLOWED_BY_DOT,
+      CompileTimeErrorCode.prefixIdentifierNotFollowedByDot,
       arguments: [target.name],
     );
   }
@@ -381,7 +379,7 @@ class MethodInvocationResolver with ScopeHelpers {
     if (!element.isStatic) {
       _resolver.diagnosticReporter.atNode(
         nameNode,
-        CompileTimeErrorCode.STATIC_ACCESS_TO_INSTANCE_MEMBER,
+        CompileTimeErrorCode.staticAccessToInstanceMember,
         arguments: [nameNode.name],
       );
     }
@@ -406,7 +404,7 @@ class MethodInvocationResolver with ScopeHelpers {
 
     _resolver.diagnosticReporter.atNode(
       node.methodName,
-      CompileTimeErrorCode.UNDEFINED_FUNCTION,
+      CompileTimeErrorCode.undefinedFunction,
       arguments: [node.methodName.name],
     );
   }
@@ -420,7 +418,7 @@ class MethodInvocationResolver with ScopeHelpers {
       if (_resolver.isConstructorTearoffsEnabled) {
         _resolver.diagnosticReporter.atNode(
           methodName,
-          CompileTimeErrorCode.NEW_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT,
+          CompileTimeErrorCode.newWithUndefinedConstructorDefault,
           arguments: [receiver.displayName],
         );
       } else {
@@ -430,7 +428,7 @@ class MethodInvocationResolver with ScopeHelpers {
     } else {
       _resolver.diagnosticReporter.atNode(
         methodName,
-        CompileTimeErrorCode.UNDEFINED_METHOD,
+        CompileTimeErrorCode.undefinedMethod,
         arguments: [methodName.name, receiver.displayName],
       );
     }
@@ -439,7 +437,7 @@ class MethodInvocationResolver with ScopeHelpers {
   void _reportUseOfVoidType(AstNode errorNode) {
     _resolver.diagnosticReporter.atNode(
       errorNode,
-      CompileTimeErrorCode.USE_OF_VOID_RESULT,
+      CompileTimeErrorCode.useOfVoidResult,
     );
   }
 
@@ -546,7 +544,7 @@ class MethodInvocationResolver with ScopeHelpers {
     // `extension.name` is non-`null`.
     _resolver.diagnosticReporter.atNode(
       nameNode,
-      CompileTimeErrorCode.UNDEFINED_EXTENSION_METHOD,
+      CompileTimeErrorCode.undefinedExtensionMethod,
       arguments: [name, extension.name!],
     );
     return null;
@@ -578,7 +576,7 @@ class MethodInvocationResolver with ScopeHelpers {
       // assume `override.staticElement!.name` is non-`null`.
       _resolver.diagnosticReporter.atNode(
         nameNode,
-        CompileTimeErrorCode.UNDEFINED_EXTENSION_METHOD,
+        CompileTimeErrorCode.undefinedExtensionMethod,
         arguments: [name, override.element.name!],
       );
       return null;
@@ -587,7 +585,7 @@ class MethodInvocationResolver with ScopeHelpers {
     if (member.isStatic) {
       _resolver.diagnosticReporter.atNode(
         nameNode,
-        CompileTimeErrorCode.EXTENSION_OVERRIDE_ACCESS_TO_STATIC_MEMBER,
+        CompileTimeErrorCode.extensionOverrideAccessToStaticMember,
       );
     }
 
@@ -595,7 +593,7 @@ class MethodInvocationResolver with ScopeHelpers {
       // Report this error and recover by treating it like a non-cascade.
       _resolver.diagnosticReporter.atToken(
         override.name,
-        CompileTimeErrorCode.EXTENSION_OVERRIDE_WITH_CASCADE,
+        CompileTimeErrorCode.extensionOverrideWithCascade,
       );
     }
 
@@ -723,7 +721,7 @@ class MethodInvocationResolver with ScopeHelpers {
 
       _resolver.diagnosticReporter.atNode(
         receiver,
-        WarningCode.RECEIVER_OF_TYPE_NEVER,
+        WarningCode.receiverOfTypeNever,
       );
 
       node.methodName.setPseudoExpressionStaticType(_dynamicType);
@@ -856,7 +854,7 @@ class MethodInvocationResolver with ScopeHelpers {
         };
         _resolver.diagnosticReporter.atNode(
           nameNode,
-          CompileTimeErrorCode.UNDEFINED_METHOD,
+          CompileTimeErrorCode.undefinedMethod,
           arguments: [name, receiverTypeName],
         );
         return null;
@@ -1027,7 +1025,7 @@ class MethodInvocationResolver with ScopeHelpers {
 
       _resolver.diagnosticReporter.atNode(
         nameNode,
-        CompileTimeErrorCode.ABSTRACT_SUPER_MEMBER_REFERENCE,
+        CompileTimeErrorCode.abstractSuperMemberReference,
         arguments: [target.kind.displayName, name],
       );
       return null;
@@ -1041,7 +1039,7 @@ class MethodInvocationResolver with ScopeHelpers {
     );
     _resolver.diagnosticReporter.atNode(
       nameNode,
-      CompileTimeErrorCode.UNDEFINED_SUPER_METHOD,
+      CompileTimeErrorCode.undefinedSuperMethod,
       arguments: [name, enclosingClass.firstFragment.displayName],
     );
     return null;
@@ -1165,7 +1163,7 @@ class MethodInvocationResolver with ScopeHelpers {
     if (!nameNode.isSynthetic) {
       _resolver.diagnosticReporter.atNode(
         nameNode,
-        CompileTimeErrorCode.UNDEFINED_METHOD,
+        CompileTimeErrorCode.undefinedMethod,
         arguments: [name, receiverClassName],
       );
     }
@@ -1271,7 +1269,7 @@ class MethodInvocationResolver with ScopeHelpers {
       } else {
         _resolver.diagnosticReporter.atNode(
           nameNode,
-          CompileTimeErrorCode.DOT_SHORTHAND_UNDEFINED_INVOCATION,
+          CompileTimeErrorCode.dotShorthandUndefinedInvocation,
           arguments: [nameNode.name, receiver.displayName],
         );
         _setInvalidTypeResolutionForDotShorthand(
@@ -1305,7 +1303,7 @@ class MethodInvocationResolver with ScopeHelpers {
 
     _resolver.diagnosticReporter.atNode(
       nameNode,
-      CompileTimeErrorCode.DOT_SHORTHAND_UNDEFINED_INVOCATION,
+      CompileTimeErrorCode.dotShorthandUndefinedInvocation,
       arguments: [nameNode.name, receiver.displayName],
     );
     _setInvalidTypeResolutionForDotShorthand(