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Refactor function return type representation (#6463)

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This separates the return type from the return pattern, and replaces the
return pattern with a block of return patterns. This is a step toward
support for `ref` returns (where there's no corresponding return
pattern) and compund-form returns (where there may be multiple return
patterns).
This commit is contained in:
Geoff Romer
2025-12-10 18:34:23 +00:00
committed by GitHub
parent 77918d023b
commit bf45b1cbf5
57 changed files with 1668 additions and 1532 deletions
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toolchain/check/node_stack.h
+2 -1
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@@ -415,7 +415,6 @@ class NodeStack {
case Parse::NodeKind::FieldNameAndType:
case Parse::NodeKind::IfExprThen:
case Parse::NodeKind::RequireIntroducer:
case Parse::NodeKind::ReturnType:
case Parse::NodeKind::ShortCircuitOperandAnd:
case Parse::NodeKind::ShortCircuitOperandOr:
case Parse::NodeKind::StructLiteralField:
@@ -447,6 +446,8 @@ class NodeStack {
case Parse::NodeKind::DefaultLibrary:
case Parse::NodeKind::LibraryName:
return Id::KindFor<SemIR::LibraryNameId>();
case Parse::NodeKind::ReturnType:
return Id::KindFor<SemIR::InstId>();
case Parse::NodeKind::AssociatedConstantInitializer:
case Parse::NodeKind::AssociatedConstantIntroducer:
case Parse::NodeKind::BuiltinName: