libstdc++-v3/testsuite/20_util/result_of/1.cc

   1 // { dg-options "-std=gnu++0x" }
   2 // { dg-do compile }
   3
   4 // Copyright (C) 2012-2013 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <functional>
  22 #include <type_traits>
  23
  24 struct X {
  25   int i;
  26   void f1() { }
  27   void f2() volatile { }
  28 };
  29
  30 typedef int X::*pm;
  31 typedef void (X::*pmf1)();
  32 typedef void (X::*pmf2)() volatile;
  33
  34 typedef std::result_of<pm const&(X&)>::type result;
  35 static_assert(std::is_same<result, int&>::value,
  36               "invoking cv-qualified pointer-to-member-object");
  37
  38 typedef std::result_of<pmf1 const&(X&)>::type result1;
  39 static_assert(std::is_void<result1>::value,
  40               "invoking cv-qualified pointer-to-member-function");
  41
  42 typedef std::result_of<pmf2 const&(X&)>::type result2;
  43 static_assert(std::is_void<result2>::value,
  44               "invoking cv-qualified pointer-to-member-function");
  45
  46 typedef std::result_of<pm(volatile X&)>::type result3;
  47 static_assert(std::is_same<result3, volatile int&>::value,
  48               "invoking pointer-to-member-object on volatile object");
  49
  50 typedef std::result_of<pmf2(volatile X&)>::type result4;
  51 static_assert(std::is_void<result4>::value,
  52               "invoking pointer-to-member-function on volatile object");
  53