Rework InvocationInferrer.rawType.

Changed from a non-final field to a parameter, to avoid confusion when
the value changes.

Change-Id: If7190ed36d93b903f61a3ea41bfa438bc287b734
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/240646
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Paul Berry <paulberry@google.com>

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

@@ -115,11 +115,10 @@ class AnnotationResolver {
               resolver: _resolver,
               node: node,
               argumentList: argumentList,
-              rawType: null,
               contextType: null,
               whyNotPromotedList: whyNotPromotedList,
               constructorName: constructorName)
-          .resolveInvocation();
+          .resolveInvocation(rawType: null);
       return;
     }
 
@@ -133,11 +132,10 @@ class AnnotationResolver {
             resolver: _resolver,
             node: node,
             argumentList: argumentList,
-            rawType: constructorRawType,
             contextType: null,
             whyNotPromotedList: whyNotPromotedList,
             constructorName: constructorName)
-        .resolveInvocation();
+        .resolveInvocation(rawType: constructorRawType);
   }
 
   void _extensionGetter(
@@ -407,11 +405,10 @@ class AnnotationResolver {
               resolver: _resolver,
               node: node,
               argumentList: arguments,
-              rawType: null,
               contextType: null,
               whyNotPromotedList: whyNotPromotedList,
               constructorName: null)
-          .resolveInvocation();
+          .resolveInvocation(rawType: null);
     }
   }
 }

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

@@ -119,10 +119,9 @@ class FunctionExpressionInvocationResolver {
       resolver: _resolver,
       node: node,
       argumentList: node.argumentList,
-      rawType: rawType,
       whyNotPromotedList: whyNotPromotedList,
       contextType: contextType,
-    ).resolveInvocation();
+    ).resolveInvocation(rawType: rawType);
 
     _inferenceHelper.recordStaticType(node, returnType,
         contextType: contextType);
@@ -209,10 +208,9 @@ class FunctionExpressionInvocationResolver {
             resolver: _resolver,
             node: node,
             argumentList: node.argumentList,
-            rawType: null,
             contextType: contextType,
             whyNotPromotedList: whyNotPromotedList)
-        .resolveInvocation();
+        .resolveInvocation(rawType: null);
     node.staticInvokeType = DynamicTypeImpl.instance;
     node.staticType = type;
   }

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

@@ -66,10 +66,9 @@ class InstanceCreationExpressionResolver {
             resolver: _resolver,
             node: node,
             argumentList: node.argumentList,
-            rawType: elementToInfer?.asType,
             contextType: contextType,
             whyNotPromotedList: whyNotPromotedList)
-        .resolveInvocation();
+        .resolveInvocation(rawType: elementToInfer?.asType);
     _resolver.inferenceHelper.recordStaticType(
         node, node.constructorName.type.type!,
         contextType: contextType);

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

@@ -174,10 +174,9 @@ class InvocationInferenceHelper {
       resolver: _resolver,
       node: node,
       argumentList: node.argumentList,
-      rawType: rawType,
       contextType: contextType,
       whyNotPromotedList: whyNotPromotedList,
-    ).resolveInvocation();
+    ).resolveInvocation(rawType: rawType);
 
     recordStaticType(node, returnType, contextType: contextType);
   }

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

@@ -61,7 +61,6 @@ class AnnotationInferrer extends FullInvocationInferrer<AnnotationImpl> {
       {required ResolverVisitor resolver,
       required AnnotationImpl node,
       required ArgumentListImpl argumentList,
-      required FunctionType? rawType,
       required DartType? contextType,
       required List<WhyNotPromotedGetter> whyNotPromotedList,
       required this.constructorName})
@@ -69,7 +68,6 @@ class AnnotationInferrer extends FullInvocationInferrer<AnnotationImpl> {
             resolver: resolver,
             node: node,
             argumentList: argumentList,
-            rawType: rawType,
             contextType: contextType,
             whyNotPromotedList: whyNotPromotedList);
 
@@ -113,14 +111,12 @@ abstract class FullInvocationInferrer<Node extends AstNodeImpl>
       {required ResolverVisitor resolver,
       required Node node,
       required ArgumentListImpl argumentList,
-      required FunctionType? rawType,
       required DartType? contextType,
       required List<WhyNotPromotedGetter> whyNotPromotedList})
       : super(
             resolver: resolver,
             node: node,
             argumentList: argumentList,
-            rawType: rawType,
             contextType: contextType,
             whyNotPromotedList: whyNotPromotedList);
 
@@ -138,9 +134,8 @@ abstract class FullInvocationInferrer<Node extends AstNodeImpl>
       CompileTimeErrorCode.WRONG_NUMBER_OF_TYPE_ARGUMENTS_METHOD;
 
   @override
-  DartType resolveInvocation() {
+  DartType resolveInvocation({required FunctionType? rawType}) {
     var typeArgumentList = _typeArguments;
-    var rawType = this.rawType;
 
     List<DartType>? typeArgumentTypes;
     GenericInferrer? inferrer;
@@ -202,7 +197,7 @@ abstract class FullInvocationInferrer<Node extends AstNodeImpl>
     } else if (rawType == null || rawType.typeFormals.isEmpty) {
       typeArgumentTypes = const <DartType>[];
     } else {
-      this.rawType = rawType = getFreshTypeParameters(rawType.typeFormals)
+      rawType = getFreshTypeParameters(rawType.typeFormals)
           .applyToFunctionType(rawType);
 
       inferrer = resolver.typeSystem.setupGenericTypeInference(
@@ -233,7 +228,8 @@ abstract class FullInvocationInferrer<Node extends AstNodeImpl>
               resolver.typeSystem,
               deferredClosures,
               rawType?.typeFormals.toSet() ?? const {},
-              _computeUndeferredParamInfo(parameterMap, deferredClosures))
+              _computeUndeferredParamInfo(
+                  rawType, parameterMap, deferredClosures))
           .planReconciliationStages()) {
         if (inferrer != null && !isFirstStage) {
           substitution = Substitution.fromPairs(
@@ -273,6 +269,7 @@ abstract class FullInvocationInferrer<Node extends AstNodeImpl>
   /// Computes a list of [_ParamInfo] objects corresponding to the invocation
   /// parameters that were *not* deferred.
   List<_ParamInfo> _computeUndeferredParamInfo(
+      FunctionType? rawType,
       Map<Object, ParameterElement> parameterMap,
       List<_DeferredParamInfo> deferredClosures) {
     if (rawType == null) return const [];
@@ -315,14 +312,12 @@ class FunctionExpressionInvocationInferrer
       {required ResolverVisitor resolver,
       required FunctionExpressionInvocationImpl node,
       required ArgumentListImpl argumentList,
-      required FunctionType? rawType,
       required DartType? contextType,
       required List<WhyNotPromotedGetter> whyNotPromotedList})
       : super._(
             resolver: resolver,
             node: node,
             argumentList: argumentList,
-            rawType: rawType,
             contextType: contextType,
             whyNotPromotedList: whyNotPromotedList);
 
@@ -338,14 +333,12 @@ class InstanceCreationInferrer
       {required ResolverVisitor resolver,
       required InstanceCreationExpressionImpl node,
       required ArgumentListImpl argumentList,
-      required FunctionType? rawType,
       required DartType? contextType,
       required List<WhyNotPromotedGetter> whyNotPromotedList})
       : super._(
             resolver: resolver,
             node: node,
             argumentList: argumentList,
-            rawType: rawType,
             contextType: contextType,
             whyNotPromotedList: whyNotPromotedList);
 
@@ -397,14 +390,12 @@ abstract class InvocationExpressionInferrer<
       {required ResolverVisitor resolver,
       required Node node,
       required ArgumentListImpl argumentList,
-      required FunctionType? rawType,
       required DartType? contextType,
       required List<WhyNotPromotedGetter> whyNotPromotedList})
       : super._(
             resolver: resolver,
             node: node,
             argumentList: argumentList,
-            rawType: rawType,
             contextType: contextType,
             whyNotPromotedList: whyNotPromotedList);
 
@@ -432,18 +423,15 @@ class InvocationInferrer<Node extends AstNodeImpl> {
   final ResolverVisitor resolver;
   final Node node;
   final ArgumentListImpl argumentList;
-  FunctionType? rawType;
   final DartType? contextType;
   final List<WhyNotPromotedGetter> whyNotPromotedList;
 
   /// Prepares to perform type inference on an invocation expression of type
-  /// [Node].  [rawType] should be the type of the function the invocation is
-  /// resolved to (with type arguments not applied yet).
+  /// [Node].
   InvocationInferrer(
       {required this.resolver,
       required this.node,
       required this.argumentList,
-      required this.rawType,
       required this.contextType,
       required this.whyNotPromotedList});
 
@@ -451,8 +439,10 @@ class InvocationInferrer<Node extends AstNodeImpl> {
   /// `identical` (which needs special flow analysis treatment).
   bool get _isIdentical => false;
 
-  /// Performs type inference on the invocation expression.
-  void resolveInvocation() {
+  /// Performs type inference on the invocation expression.  [rawType] should be
+  /// the type of the function the invocation is resolved to (with type
+  /// arguments not applied yet).
+  void resolveInvocation({required FunctionType? rawType}) {
     var deferredClosures = _visitArguments(
         parameterMap: _computeParameterMap(rawType?.parameters ?? const []));
     if (deferredClosures != null) {
@@ -591,14 +581,12 @@ class MethodInvocationInferrer
       {required ResolverVisitor resolver,
       required MethodInvocationImpl node,
       required ArgumentListImpl argumentList,
-      required FunctionType? rawType,
       required DartType? contextType,
       required List<WhyNotPromotedGetter> whyNotPromotedList})
       : super._(
             resolver: resolver,
             node: node,
             argumentList: argumentList,
-            rawType: rawType,
             contextType: contextType,
             whyNotPromotedList: whyNotPromotedList);
 

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

@@ -332,10 +332,9 @@ class MethodInvocationResolver {
             resolver: _resolver,
             node: node,
             argumentList: node.argumentList,
-            rawType: rawType is FunctionType ? rawType : null,
             contextType: contextType,
             whyNotPromotedList: whyNotPromotedList)
-        .resolveInvocation();
+        .resolveInvocation(rawType: rawType is FunctionType ? rawType : null);
     _inferenceHelper.recordStaticType(node, staticStaticType,
         contextType: contextType);
   }
@@ -478,10 +477,9 @@ class MethodInvocationResolver {
             resolver: _resolver,
             node: node,
             argumentList: node.argumentList,
-            rawType: rawType,
             whyNotPromotedList: whyNotPromotedList,
             contextType: contextType)
-        .resolveInvocation();
+        .resolveInvocation(rawType: rawType);
   }
 
   void _resolveReceiverFunctionBounded(
@@ -553,10 +551,9 @@ class MethodInvocationResolver {
               resolver: _resolver,
               node: node,
               argumentList: node.argumentList,
-              rawType: null,
               contextType: contextType,
               whyNotPromotedList: whyNotPromotedList)
-          .resolveInvocation();
+          .resolveInvocation(rawType: null);
 
       _resolver.errorReporter.reportErrorForNode(
         HintCode.RECEIVER_OF_TYPE_NEVER,
@@ -574,10 +571,9 @@ class MethodInvocationResolver {
               resolver: _resolver,
               node: node,
               argumentList: node.argumentList,
-              rawType: null,
               contextType: contextType,
               whyNotPromotedList: whyNotPromotedList)
-          .resolveInvocation();
+          .resolveInvocation(rawType: null);
       return;
     }
   }

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

@@ -1545,6 +1545,9 @@ class ResolverVisitor extends ThrowingAstVisitor<void>
             resolver: this,
             node: node,
             argumentList: node.argumentList,
+            contextType: null,
+            whyNotPromotedList: whyNotPromotedList)
+        .resolveInvocation(
             rawType: receiverContextType == null
                 ? null
                 : FunctionTypeImpl(
@@ -1554,10 +1557,7 @@ class ResolverVisitor extends ThrowingAstVisitor<void>
                             null, receiverContextType, ParameterKind.REQUIRED)
                       ],
                     returnType: DynamicTypeImpl.instance,
-                    nullabilitySuffix: NullabilitySuffix.none),
-            contextType: null,
-            whyNotPromotedList: whyNotPromotedList)
-        .resolveInvocation();
+                    nullabilitySuffix: NullabilitySuffix.none));
 
     extensionResolver.resolveOverride(node, whyNotPromotedList);
   }
@@ -2170,10 +2170,9 @@ class ResolverVisitor extends ThrowingAstVisitor<void>
             resolver: this,
             node: node,
             argumentList: node.argumentList,
-            rawType: node.staticElement?.type,
             contextType: null,
             whyNotPromotedList: whyNotPromotedList)
-        .resolveInvocation();
+        .resolveInvocation(rawType: node.staticElement?.type);
     checkForArgumentTypesNotAssignableInList(
         node.argumentList, whyNotPromotedList);
   }
@@ -2280,10 +2279,9 @@ class ResolverVisitor extends ThrowingAstVisitor<void>
             resolver: this,
             node: node,
             argumentList: node.argumentList,
-            rawType: node.staticElement?.type,
             contextType: null,
             whyNotPromotedList: whyNotPromotedList)
-        .resolveInvocation();
+        .resolveInvocation(rawType: node.staticElement?.type);
     checkForArgumentTypesNotAssignableInList(
         node.argumentList, whyNotPromotedList);
   }