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Support tuple patterns outside parameter lists (#4923)

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Parameter lists need substantially different treatment than tuple
patterns in other contexts, so this change splits them into separate
parse node kinds.

---------

Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
This commit is contained in:
Geoff Romer
2025-02-20 03:17:45 +00:00
committed by GitHub
co-authored by Jon Ross-Perkins
parent 35f5a7f115
commit 74e1a9949f
201 changed files with 1680 additions and 860 deletions
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toolchain/parse/testdata/tuple/nested.carbon
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+23
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@@ -10,6 +10,8 @@
var y: ((), (), ());
var (a: (), (b: (), c: ()));
// CHECK:STDOUT: - filename: nested.carbon
// CHECK:STDOUT: parse_tree: [
// CHECK:STDOUT: {kind: 'FileStart', text: ''},
@@ -28,5 +30,26 @@ var y: ((), (), ());
// CHECK:STDOUT: {kind: 'VarBindingPattern', text: ':', subtree_size: 12},
// CHECK:STDOUT: {kind: 'VariablePattern', text: 'var', subtree_size: 13},
// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 15},
// CHECK:STDOUT: {kind: 'VariableIntroducer', text: 'var'},
// CHECK:STDOUT: {kind: 'TuplePatternStart', text: '('},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'a'},
// CHECK:STDOUT: {kind: 'TupleLiteralStart', text: '('},
// CHECK:STDOUT: {kind: 'TupleLiteral', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'VarBindingPattern', text: ':', subtree_size: 4},
// CHECK:STDOUT: {kind: 'PatternListComma', text: ','},
// CHECK:STDOUT: {kind: 'TuplePatternStart', text: '('},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'b'},
// CHECK:STDOUT: {kind: 'TupleLiteralStart', text: '('},
// CHECK:STDOUT: {kind: 'TupleLiteral', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'VarBindingPattern', text: ':', subtree_size: 4},
// CHECK:STDOUT: {kind: 'PatternListComma', text: ','},
// CHECK:STDOUT: {kind: 'IdentifierNameNotBeforeParams', text: 'c'},
// CHECK:STDOUT: {kind: 'TupleLiteralStart', text: '('},
// CHECK:STDOUT: {kind: 'TupleLiteral', text: ')', subtree_size: 2},
// CHECK:STDOUT: {kind: 'VarBindingPattern', text: ':', subtree_size: 4},
// CHECK:STDOUT: {kind: 'TuplePattern', text: ')', subtree_size: 11},
// CHECK:STDOUT: {kind: 'TuplePattern', text: ')', subtree_size: 18},
// CHECK:STDOUT: {kind: 'VariablePattern', text: 'var', subtree_size: 19},
// CHECK:STDOUT: {kind: 'VariableDecl', text: ';', subtree_size: 21},
// CHECK:STDOUT: {kind: 'FileEnd', text: ''},
// CHECK:STDOUT: ]