libstdc++-v3/testsuite/20_util/function/9.cc

   1 // { dg-do run { target c++11 } }
   2 // 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
   3 //
   4 // Copyright (C) 2005-2017 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 // 20.7.15 polymorphic function object wrapper
  22 #include <functional>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_tr1.h>
  25
  26 using namespace __gnu_test;
  27
  28 // Put function objects into a void-returning function<> wrapper
  29 void test09()
  30 {
  31   using std::function;
  32   using std::ref;
  33   using std::cref;
  34
  35   int (X::*X_foo_c)() const = &X::foo_c;
  36   function<void(X&)> f(&X::bar);
  37   f = &X::foo;
  38   f = ref(X_foo_c);
  39   f = cref(X_foo_c);
  40
  41   function<void(float)> g = &truncate_float;
  42   g = do_truncate_float_t();
  43 }
  44
  45 int main()
  46 {
  47   test09();
  48
  49   VERIFY( do_truncate_double_t::live_objects == 0 );
  50   VERIFY( do_truncate_float_t::live_objects == 0 );
  51
  52   return 0;
  53 }