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7502f3ce83
`TypeChecker::checkExistentialTypes` has decl-specific logic and backs out without invoking `ExistentialTypeVisitor` on `TypeDecl`s, but `MacroExpansionDecl` isn't a type decl and would fall into `ExistentialTypeVisitor` which will visit its expansion. The caller of `checkExistentialTypes` already visits auxiliary decls, so here we should only visit arguments and generic arguments of a macro. Fixes a case where a declaration macro produces a type that conforms to a PAT. We now also run existential diagnostics on generic arguments on a `MacroExpansionDecl` that was previously not handled. Note: I tried bailing out in `walkToDeclPre` but we should really visit macro arguments and generic arguments. Not walking expansions in `ExistentialTypeVisitor` is also not the right fix because we need to be able to visit macro expansions in arguments. rdar://109779928
21 lines
1.2 KiB
Swift
21 lines
1.2 KiB
Swift
@freestanding(declaration, names: named(StructWithUnqualifiedLookup))
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public macro structWithUnqualifiedLookup() = #externalMacro(module: "MacroDefinition", type: "DefineStructWithUnqualifiedLookupMacro")
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@freestanding(declaration)
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public macro anonymousTypes(public: Bool = false, causeErrors: Bool = false, _: () -> String) = #externalMacro(module: "MacroDefinition", type: "DefineAnonymousTypesMacro")
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@freestanding(declaration)
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public macro introduceTypeCheckingErrors() = #externalMacro(module: "MacroDefinition", type: "IntroduceTypeCheckingErrorsMacro")
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@freestanding(declaration)
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public macro freestandingWithClosure<T>(_ value: T, body: (T) -> T) = #externalMacro(module: "MacroDefinition", type: "EmptyDeclarationMacro")
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@freestanding(declaration, names: arbitrary)
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public macro bitwidthNumberedStructs(_ baseName: String) = #externalMacro(module: "MacroDefinition", type: "DefineBitwidthNumberedStructsMacro")
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@freestanding(expression)
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public macro stringify<T>(_ value: T) -> (T, String) = #externalMacro(module: "MacroDefinition", type: "StringifyMacro")
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@freestanding(declaration, names: named(value))
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public macro varValue() = #externalMacro(module: "MacroDefinition", type: "VarValueMacro")
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