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gcc-9.2.0
author anatofuz
date Thu, 13 Feb 2020 11:34:05 +0900
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// C++20 NB comment US115
// { dg-do compile { target c++2a } }

template <class T> concept Any = true;

template <class T>
struct A
{
  friend void f() requires Any<T> { } // OK
  friend void g() requires Any<T>;    // { dg-error "" }
};

A<int> a;