libstdc++-v3/testsuite/20_util/bind/ref2.cc

   1 // Copyright (C) 2010-2019 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // 20.7.11 Function template bind
  19
  20 // { dg-do run { target c++11 } }
  21
  22 #include <functional>
  23 #include <testsuite_hooks.h>
  24
  25 using namespace std::placeholders;
  26
  27 int inc(int& i) { return ++i; }
  28
  29 void test01()
  30 {
  31   int counter = 0;
  32   std::bind(&inc, _1)(counter);
  33   VERIFY(counter == 1 );
  34   std::bind(&inc, std::ref(counter))();
  35   VERIFY(counter == 2 );
  36 }
  37
  38 struct Inc
  39 {
  40   int operator()(int& i) const { return ++i; }
  41   void operator()(int&&) const { }
  42
  43   int f(int& i) const { return ++i; }
  44 };
  45
  46 void test02()
  47 {
  48   int counter = 0;
  49   std::bind(Inc(), _1)(counter);
  50   VERIFY(counter == 1 );
  51   std::bind(&Inc::f, Inc(), std::ref(counter))();
  52   VERIFY(counter == 2 );
  53 }
  54
  55 int main()
  56 {
  57   test01();
  58   test02();
  59 }