clang/test/SemaCXX/cxx20-check-fptr-constraints.cpp

   1 // RUN: %clang_cc1 -std=c++20 -verify %s
   2
   3 namespace P1972 {
   4 template <typename T>
   5 struct S {
   6   static void f(int)
   7     requires false; // expected-note 4{{because 'false' evaluated to false}}
   8 };
   9 void g() {
  10   S<int>::f(0);                      // expected-error{{invalid reference to function 'f': constraints not satisfied}}
  11   void (*p1)(int) = S<int>::f;       // expected-error{{invalid reference to function 'f': constraints not satisfied}}
  12   void (*p21)(int) = &S<int>::f;     // expected-error{{invalid reference to function 'f': constraints not satisfied}}
  13   decltype(S<int>::f) *p2 = nullptr; // expected-error{{invalid reference to function 'f': constraints not satisfied}}
  14 }
  15 }