libstdc++-v3/testsuite/20_util/result_of/requirements/alias_decl.cc

   1 // { dg-do compile { target c++14 } }
   2
   3 // Copyright (C) 2013-2024 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 #include <type_traits>
  21
  22 using namespace std;
  23
  24 using F1 = char(*)(char);
  25 static_assert( is_same<result_of<F1(int)>::type, result_of_t<F1(int)>>(),
  26                "result_of_t<F1(int)>" );
  27
  28 struct X { };
  29 using F2 = int X::*;
  30 static_assert( is_same<result_of<F2(X)>::type, result_of_t<F2(X)>>(),
  31                "result_of_t<F2(X)>" );