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

   1 // 2005-03-20 Douglas Gregor <doug.gregor -at- gmail.com>
   2 //
   3 // Copyright (C) 2005-2021 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 // Operations on empty function<> objects
  28 void test01()
  29 {
  30   using namespace std::tr1::placeholders;
  31
  32   int five = 5;
  33   int seven = 7;
  34   VERIFY( std::tr1::bind(std::multiplies<int>(), _1, std::tr1::bind(std::minus<int>(), 6, _2))(five, seven) == -5 );
  35   VERIFY( std::tr1::bind(std::multiplies<int>(), _1, std::tr1::bind(std::minus<int>(), 6, _2))(seven, five) == 7 );
  36 }
  37
  38 int main()
  39 {
  40   test01();
  41   return 0;
  42 }