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Sema: Check the availability of result builder attributes on function parameters #60734

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Merged
merged 1 commit into from
Aug 24, 2022
Merged

Sema: Check the availability of result builder attributes on function parameters #60734

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3 changes: 3 additions & 0 deletions lib/Sema/TypeCheckAccess.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1819,6 +1819,9 @@ class DeclAvailabilityChecker : public DeclVisitor<DeclAvailabilityChecker> {
checkType(wrapperType, wrapperAttrs[index]->getTypeRepr(), fn);
}

if (auto attr = P->getAttachedResultBuilder())
checkType(P->getResultBuilderType(), attr->getTypeRepr(), fn);

checkType(P->getInterfaceType(), P->getTypeRepr(), fn);
}
}
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5 changes: 4 additions & 1 deletion test/Constraints/result_builder_availability.swift
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Expand Up @@ -5,13 +5,16 @@
@available(*, unavailable)
@resultBuilder
struct UnavailableBuilder {
// expected-note@-1 {{'UnavailableBuilder' has been explicitly marked unavailable here}}
// expected-note@-1 2 {{'UnavailableBuilder' has been explicitly marked unavailable here}}
static func buildBlock() {}
}

@UnavailableBuilder public func usesUnavailableBuilder() {}
// expected-error@-1 {{'UnavailableBuilder' is unavailable}}

public func takesUnavailableBuilder(@UnavailableBuilder _ fn: () -> ()) {}
// expected-error@-1 {{'UnavailableBuilder' is unavailable}}

enum Either<T,U> {
case first(T)
case second(U)
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