File: concepts-this1.C

package info (click to toggle)
gcc-arm-none-eabi 15%3A14.2.rel1-1
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,099,328 kB
  • sloc: cpp: 3,627,108; ansic: 2,571,498; ada: 834,230; f90: 235,082; makefile: 79,231; asm: 74,984; xml: 51,692; exp: 39,736; sh: 33,298; objc: 15,629; python: 15,069; fortran: 14,429; pascal: 7,003; awk: 5,070; perl: 3,106; ml: 285; lisp: 253; lex: 204; haskell: 135
file content (30 lines) | stat: -rw-r--r-- 507 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
// PR c++/103198
// { dg-do compile { target c++20 } }

template<class T, class = void>
struct A {
  T val;

  template<class U>
    requires requires { val.x; }
  void f(U);

  static void g(int)
    requires requires { val.x; };

  void h(int)
    requires requires { val.x; };
};

struct B { int x; };
struct C { };

int main() {
  A<B>().f(0);
  A<B>().g(0);
  A<B>().h(0);

  A<C>().f(0); // { dg-error "no match" }
  A<C>().g(0); // { dg-error "no match" }
  A<C>().h(0); // { dg-error "no match" }
}