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3b5e7c83a6
Try to fix https://github.com/llvm/llvm-project/issues/84368 When visiting class members in `TemplateDeclInstantiator::VisitClassTemplateDecl` during `Sema::InstantiateClass`, we miss to set attribute of friend declaration if it is(`isFriend` is true). This will lead to `Sema::AreConstraintExpressionsEqual` return false when invoked in `MatchTemplateParameterKind`. Because it makes `Sema::getTemplateInstantiationArgs` returns incorrect template argument(`MultiLevelTemplateArgumentList`). When we handle `CXXRecordDecl` In `Sema::getTemplateInstantiationArgs`, friend declaration(its parent context is `FileContext`) makes us to choose `LexicalDeclContext` not `DeclContext` and this is what we want. Co-authored-by: huqizhi <836744285@qq.com>
17 lines
398 B
C++
17 lines
398 B
C++
// RUN: %clang_cc1 -std=c++20 -verify %s
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// RUN: %clang_cc1 -std=c++23 -verify %s
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// expected-no-diagnostics
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template<class T> concept IsOk = requires() { typename T::Float; };
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template<IsOk T> struct Thing;
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template<IsOk T> struct Foobar {
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template<int> struct Inner {
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template<IsOk T2> friend struct Thing;
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};
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};
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struct MyType { using Float=float; };
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Foobar<MyType>::Inner<0> foobar;
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