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

   1 // { dg-do run { target c++11 } }
   2 // { dg-require-effective-target hosted }
   3
   4 // 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
   5 //
   6 // Copyright (C) 2005-2023 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13 //
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18 //
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 // 20.7.15 polymorphic function object wrapper
  24 #include <functional>
  25 #include <testsuite_hooks.h>
  26 #include <testsuite_tr1.h>
  27
  28 using namespace __gnu_test;
  29
  30 // Put function objects into a void-returning function<> wrapper
  31 void test09()
  32 {
  33   using std::function;
  34   using std::ref;
  35   using std::cref;
  36
  37   int (X::*X_foo_c)() const = &X::foo_c;
  38   function<void(X&)> f(&X::bar);
  39   f = &X::foo;
  40   f = ref(X_foo_c);
  41   f = cref(X_foo_c);
  42
  43   function<void(float)> g = &truncate_float;
  44   g = do_truncate_float_t();
  45 }
  46
  47 int main()
  48 {
  49   test09();
  50
  51   VERIFY( do_truncate_double_t::live_objects == 0 );
  52   VERIFY( do_truncate_float_t::live_objects == 0 );
  53
  54   return 0;
  55 }