libstdc++-v3/testsuite/20_util/reference_wrapper/24803.cc

   1 // { dg-options "-std=gnu++0x" }
   2 // { dg-do compile }
   3
   4 // Copyright (C) 2008-2013 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
  22 #include <functional>
  23
  24 struct test_type
  25 {
  26    int member();
  27    int cmember()const;
  28    int member2(char);
  29    int cmember2(char)const;
  30 };
  31
  32 struct functor1 : public std::unary_function<int, double>
  33 {
  34   double operator()(int) const;
  35 };
  36
  37 struct functor2 : public std::binary_function<int, char, double>
  38 {
  39    double operator()(int, char) const;
  40 };
  41
  42 template <class T>
  43 void verify_return_type(T, T)
  44 {
  45 }
  46
  47 void test01()
  48 {
  49   test_type* null_tt = 0;
  50   const test_type* null_ttc = 0;
  51   int zero;
  52
  53   std::reference_wrapper<double (int)>* pr1(0);
  54   verify_return_type((*pr1)(0), double());
  55   std::reference_wrapper<double (*)(int)>* pr2(0);
  56   verify_return_type((*pr2)(0), double());
  57   std::reference_wrapper<int (test_type::*)()>* pr3(0);
  58   verify_return_type((*pr3)(null_tt), int());
  59   std::reference_wrapper<int (test_type::*)()const>* pr4(0);
  60   verify_return_type((*pr4)(null_ttc), int());
  61   std::reference_wrapper<functor1>* pr5(0);
  62
  63   // libstdc++/24803
  64   verify_return_type((*pr5)(0), double());
  65   verify_return_type((*pr5)(zero), double());
  66
  67   std::reference_wrapper<double (int, char)>* pr1b(0);
  68   verify_return_type((*pr1b)(0, 0), double());
  69   std::reference_wrapper<double (*)(int, char)>* pr2b(0);
  70   verify_return_type((*pr2b)(0, 0), double());
  71   std::reference_wrapper<int (test_type::*)(char)>* pr3b(0);
  72   verify_return_type((*pr3b)(null_tt,zero), int());
  73   std::reference_wrapper<int (test_type::*)()const>* pr4b(0);
  74   verify_return_type((*pr4b)(null_ttc), int());
  75   std::reference_wrapper<functor2>* pr5b(0);
  76
  77   // libstdc++/24803
  78   verify_return_type((*pr5b)(0, 0), double());
  79   verify_return_type((*pr5b)(zero, zero), double());
  80 }