35 lines
563 B
C++
35 lines
563 B
C++
|
// RUN: %clang_cc1 -std=c++20 -verify %s
|
||
|
|
|
||
|
|
template<class T, class U>
|
||
|
|
concept C = true;
|
||
|
|
|
||
|
|
class non_temp {
|
||
|
|
template<C<non_temp> T>
|
||
|
|
friend void f();
|
||
|
|
|
||
|
|
non_temp();
|
||
|
|
};
|
||
|
|
|
||
|
|
template<C<non_temp> T>
|
||
|
|
void f() {
|
||
|
|
auto v = non_temp();
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class A>
|
||
|
|
class temp {
|
||
|
|
template<C<temp> T>
|
||
|
|
friend void g(); // expected-error {{friend declaration with a constraint that depends on an enclosing template parameter must be a definition}}
|
||
|
|
|
||
|
|
temp();
|
||
|
|
};
|
||
|
|
|
||
|
|
template<C<temp<int>> T>
|
||
|
|
void g() {
|
||
|
|
auto v = temp<T>();
|
||
|
|
}
|
||
|
|
|
||
|
|
void h() {
|
||
|
|
f<int>();
|
||
|
|
g<int>();
|
||
|
|
}
|