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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/sem_ir/function.cpp
+3 -3
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@@ -128,11 +128,11 @@ auto Function::GetParamPatternInfoFromPatternId(const File& sem_ir,
auto Function::GetDeclaredReturnType(const File& file,
SpecificId specific_id) const -> TypeId {
if (!return_slot_pattern_id.has_value()) {
if (!return_type_inst_id.has_value()) {
return TypeId::None;
}
return ExtractScrutineeType(
file, GetTypeOfInstInSpecific(file, specific_id, return_slot_pattern_id));
return file.types().GetTypeIdForTypeConstantId(
GetConstantValueInSpecific(file, specific_id, return_type_inst_id));
}
} // namespace Carbon::SemIR