libstdc++-v3/testsuite/tr1/3_function_objects/bind/ref.cc

   1 // 2005-03-20 Douglas Gregor <doug.gregor -at- gmail.com>
   2 //
   3 // Copyright (C) 2005-2020 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 // 3.6 function object binders
  21 #include <tr1/functional>
  22 #include <testsuite_hooks.h>
  23 #include <testsuite_tr1.h>
  24
  25 using namespace __gnu_test;
  26
  27 struct X
  28 {
  29   X() : bar(17) {}
  30
  31   int foo(int x, int y) { return bar + x + y; }
  32
  33   int bar;
  34
  35 private:
  36   X(const X&);
  37   X& operator=(const X&);
  38 };
  39
  40 // Operations on empty function<> objects
  41 void test01()
  42 {
  43   using std::tr1::bind;
  44   using std::tr1::ref;
  45   ::X x;
  46
  47   VERIFY( bind(&::X::foo, ref(x), 1, 2)() == 20 );
  48   VERIFY( bind<int>(&::X::foo, ref(x), 1, 2)() == 20 );
  49   VERIFY( bind(&::X::bar, ref(x))() == 17 );
  50   VERIFY( bind<int>(&::X::bar, ref(x))() == 17 );
  51 }
  52
  53 int main()
  54 {
  55   test01();
  56   return 0;
  57 }