Paul Berry
8aa48712be
Previously, if a pattern variable declaration appeared outside of a function or method, the parser would get very confused. Now it recognizes the situation, issues a comprehensible error message, and replaces the pattern with a synthetic identifier token so that the analyzer AST is somewhat sensible. Fixes #51322. Bug: https://github.com/dart-lang/sdk/issues/51322 Change-Id: Ica5f060cb483a39c4e50942d639939b1fab40bea Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/293087 Reviewed-by: Johnni Winther <johnniwinther@google.com> Commit-Queue: Paul Berry <paulberry@google.com>
39 lines
1.5 KiB
Plaintext
39 lines
1.5 KiB
Plaintext
Problems reported:
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parser/patterns/patternVariableDeclaration_inClass:2:7: A pattern variable declaration may not appear outside a function or method.
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var (a, b) = (0, 1);
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^^^^^^
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beginCompilationUnit(class)
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beginMetadataStar(class)
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endMetadataStar(0)
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beginClassOrMixinOrNamedMixinApplicationPrelude(class)
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handleIdentifier(C, classOrMixinDeclaration)
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handleNoTypeVariables({)
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beginClassDeclaration(class, null, null, null, null, null, null, null, null, null, C)
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handleNoType(C)
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handleClassExtends(null, 1)
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handleClassNoWithClause()
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handleImplements(null, 0)
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handleClassHeader(class, class, null)
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beginClassOrMixinOrExtensionBody(DeclarationKind.Class, {)
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beginMetadataStar(var)
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endMetadataStar(0)
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beginMember()
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handleRecoverableError(PatternVariableDeclarationOutsideFunctionOrMethod, (, ))
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beginFields(DeclarationKind.Class, null, null, null, null, null, null, var, {)
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handleNoType(var)
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handleIdentifier(, fieldDeclaration)
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beginFieldInitializer(=)
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beginParenthesizedExpressionOrRecordLiteral(()
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handleLiteralInt(0)
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handleLiteralInt(1)
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endRecordLiteral((, 2, null)
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endFieldInitializer(=, ;)
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endClassFields(null, null, null, null, null, null, var, 1, var, ;)
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endMember()
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endClassOrMixinOrExtensionBody(DeclarationKind.Class, 1, {, })
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endClassDeclaration(class, })
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endTopLevelDeclaration()
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endCompilationUnit(1, )
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