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Add initial support for parsing struct patterns (#7446)

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Implements parsing of struct patterns as per
https://github.com/carbon-language/carbon-lang/issues/6680.

This handles the full and short syntax given in the [design
doc](https://github.com/carbon-language/carbon-lang/blob/trunk/docs/design/pattern_matching.md#struct-patterns),
but the handling of the shorthand syntax may need to change as I move on
to implementing Check support (currently the shorthand is represented as
one of `LetBindingPattern`, `VarBindingPattern`, or `VariablePattern`).

This implementation assumes that the answer to
https://github.com/carbon-language/carbon-lang/issues/7404 is that
trailing commas are allowed in the struct pattern, except for the case
where an `_` is present, in which case the next token must be the
closing brace `}`.
This commit is contained in:
oli-ej
2026-07-30 16:37:46 +00:00
committed by GitHub
parent 8f224222a1
commit a683fb574b
21 changed files with 1999 additions and 57 deletions
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toolchain/check/node_stack.h
+2
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@@ -472,6 +472,8 @@ class NodeStack {
case Parse::NodeKind::RuntimeBindingName:
case Parse::NodeKind::ReturnStatementStart:
case Parse::NodeKind::StructLiteralStart:
case Parse::NodeKind::StructPatternStart:
case Parse::NodeKind::StructPatternDesignatedField:
case Parse::NodeKind::StructTypeLiteralField:
case Parse::NodeKind::StructTypeLiteralStart:
case Parse::NodeKind::TemplateBindingName: