64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
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// RUN: %clang_cc1 -std=c++20 -fsyntax-only -verify %s
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// expected-error@+2 {{non-templated function cannot have a requires clause}}
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void f1(int a)
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requires true;
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template <typename T>
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auto f2(T a) -> bool
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requires true; // OK
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// expected-error@+4 {{trailing return type must appear before trailing requires clause}}
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template <typename T>
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auto f3(T a)
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requires true
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-> bool;
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// expected-error@+2{{trailing requires clause can only be used when declaring a function}}
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void (*pf)()
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requires true;
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// expected-error@+1{{trailing requires clause can only be used when declaring a function}}
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void g(int (*)() requires true);
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// expected-error@+1{{expected expression}}
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auto *p = new void(*)(char)
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requires true;
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namespace GH61748 {
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template<typename T>
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struct S {
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// expected-error@+1 {{non-template friend declaration with a requires clause must be a definition}}
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friend void declared_friend() requires(sizeof(T) > 1);
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// OK, is a definition.
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friend void defined_friend() requires(sizeof(T) > 1){}
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// OK, is a member.
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void member() requires(sizeof(T) > 1);
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};
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template<typename T>
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void ContainingFunction() {
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// expected-error@+1 {{non-templated function cannot have a requires clause}}
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void bad() requires(sizeof(T) > 1);
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// expected-error@+1 {{function definition is not allowed here}}
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void still_bad() requires(sizeof(T) > 1) {}
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}
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void NonTemplContainingFunction() {
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// expected-error@+1 {{non-templated function cannot have a requires clause}}
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(void)[]() requires (sizeof(int)>1){};
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// OK, a template.
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auto X = [](auto) requires (sizeof(int)>1){};
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// OK, a template.
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auto Y = []<typename T>(T t) requires (sizeof(int)>1){};
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X(1);
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Y(1);
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}
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template<typename T>
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union U {
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void f() requires true;
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};
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}
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