libstdc++-v3/testsuite/20_util/function_objects/mem_fn/adl.cc

   1 // { dg-do compile { target c++11 } }
   2
   3 // Copyright (C) 2012-2017 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 <functional>
  21
  22 namespace n {
  23   struct X { int i; };
  24   void mem_fn(int X::*);
  25 }
  26
  27 using n::X;
  28
  29 X x{};
  30 int X::* p = &X::i;
  31
  32 int test01()
  33 {
  34   auto ref = std::ref(p);
  35   return ref(x);
  36 }
  37
  38 int test02()
  39 {
  40   std::function<int(X)> fun(p);
  41   return fun(x);
  42 }
  43