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Track the start of a signature more accurately (#6760)

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This change ensures that a function signature always starts with an
`IdentifierNameMaybeBeforeSignature` node (renamed from
`IdentifierNameBeforeParams`), even in the case of function declarations
like `fn F -> T` that have no parameter list. As a consequence, this
ensures that we push new entries onto `pattern_block_stack` and
`full_pattern_stack` when we start processing the function signature.
This commit is contained in:
Geoff Romer
2026-02-23 22:46:03 +00:00
committed by GitHub
parent 375a736c42
commit 4a0cf6c1fb
282 changed files with 1041 additions and 1039 deletions
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toolchain/parse/testdata/package_expr/basic.carbon
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+3 -3
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@@ -14,15 +14,15 @@ var x: package.Foo = package.Bar;
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'x'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'x'},
// CHECK:STDOUT: {kind: 'PackageExpr', text: 'package'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'Foo'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'Foo'},
// CHECK:STDOUT: {kind: 'MemberAccessExpr', text: '.', subtree_size: 3},
// CHECK:STDOUT: {kind: 'VarBindingPattern', text: ':', subtree_size: 5},
// CHECK:STDOUT: {kind: 'VariablePattern', text: 'var', subtree_size: 6},
// CHECK:STDOUT: {kind: 'VariableInitializer', text: '='},
// CHECK:STDOUT: {kind: 'PackageExpr', text: 'package'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'Bar'},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeSignature', text: 'Bar'},
// CHECK:STDOUT: {kind: 'MemberAccessExpr', text: '.', subtree_size: 3},
// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 12},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},