libstdc++-v3/testsuite/20_util/reference_wrapper/invoke-2.cc

   1 // { dg-do compile { target c++11 } }
   2 // Copyright (C) 2011-2023 Free Software Foundation, Inc.
   3 //
   4 // This file is part of the GNU ISO C++ Library.  This library is free
   5 // software; you can redistribute it and/or modify it under the
   6 // terms of the GNU General Public License as published by the
   7 // Free Software Foundation; either version 3, or (at your option)
   8 // any later version.
   9 //
  10 // This library is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License along
  16 // with this library; see the file COPYING3.  If not see
  17 // <http://www.gnu.org/licenses/>.
  18
  19 // C++11 20.8.3.4 reference_wrapper invocation [refwrap.invoke]
  20 #include <functional>
  21
  22 struct X
  23 {
  24     int f(int) { return 0; }
  25     int i;
  26 };
  27
  28 void test01()
  29 {
  30   // PR libstdc++/48521 std::result_of doesn't work with pointer to member
  31   typedef int (X::*mfp)(int);
  32   typedef int X::*mp;
  33   mfp m = &X::f;
  34   mp m2 = &X::i;
  35   X x = { };
  36   std::ref(m)(x, 1);
  37   std::ref(m)(&x, 1);
  38   int& i1 __attribute__((unused)) = std::ref(m2)(x);
  39   int& i2 __attribute__((unused)) = std::ref(m2)(&x);
  40 }
  41
  42 int main()
  43 {
  44   test01();
  45   return 0;
  46 }