libstdc++-v3/testsuite/tr1/3_function_objects/function/9.cc

   1 // 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
   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 // 3.7.2 polymorphic function object wrapper
  21 #include <tr1/functional>
  22 #include <testsuite_hooks.h>
  23 #include <testsuite_tr1.h>
  24
  25 using namespace __gnu_test;
  26
  27 // Put function objects into a void-returning function<> wrapper
  28 void test09()
  29 {
  30   using std::tr1::function;
  31   using std::tr1::ref;
  32   using std::tr1::cref;
  33
  34   int (X::*X_foo_c)() const = &X::foo_c;
  35   function<void(X&)> f(&X::bar);
  36   f = &X::foo;
  37   f = ref(X_foo_c);
  38   f = cref(X_foo_c);
  39
  40   function<void(float)> g = &truncate_float;
  41   g = do_truncate_float_t();
  42 }
  43
  44 int main()
  45 {
  46   test09();
  47
  48   VERIFY( do_truncate_double_t::live_objects == 0 );
  49   VERIFY( do_truncate_float_t::live_objects == 0 );
  50
  51   return 0;
  52 }