gomp-20050608-branch/libstdc++-v3/testsuite/tr1/3_function_objects/function/1.cc

   1 // 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
   2 //
   3 // Copyright (C) 2005 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 2, 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 COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // 3.7.2 polymorphic function object wrapper
  22 #include <tr1/functional>
  23 #include <testsuite_hooks.h>
  24 #include <testsuite_tr1.h>
  25
  26 using namespace __gnu_test;
  27
  28 bool test __attribute__((unused)) = true;
  29
  30 // Operations on empty function<> objects
  31 void test01()
  32 {
  33   using std::tr1::function;
  34   using std::tr1::bad_function_call;
  35
  36   // Default-construction
  37   function<int(float)> f1;
  38   VERIFY( ((bool)f1 == false) );
  39   VERIFY( !f1 );
  40   VERIFY( f1 == 0 );
  41   VERIFY( 0 == f1 );
  42   VERIFY( !(f1 != 0) );
  43   VERIFY( !(0 != f1) );
  44
  45   // Copy-construction
  46   function<int(float)> f2(f1);
  47   VERIFY( !f2 );
  48
  49   // Construct with NULL pointer
  50   function<int(float)> f3(0);
  51   VERIFY( !f3 );
  52
  53   // Assignment
  54   f1 = f2;
  55   VERIFY( !f1);
  56
  57   // Assignment to NULL pointer
  58   f1 = 0;
  59   VERIFY( !f1 );
  60
  61   // Swap
  62   swap(f1, f2);
  63   VERIFY( !f1 );
  64   VERIFY( !f2 );
  65
  66   // Invocation should throw bad_function_call
  67   bool thrown = false;
  68   try
  69     {
  70       f1(3.14159f);
  71       VERIFY( false );
  72     }
  73   catch (bad_function_call)
  74     {
  75       thrown = true;
  76     }
  77   VERIFY( thrown );
  78
  79   // target_type returns typeid(void)
  80   VERIFY( f1.target_type() == typeid(void) );
  81
  82   // target() always returns a NULL pointer
  83   VERIFY( f1.target<int (*)(float)>() == 0);
  84
  85   // Check const version
  86   const function<int(float)>& f1c = f1;
  87   VERIFY( f1c.target<int (*)(float)>() == 0 );
  88   VERIFY( !f1c );
  89 }
  90
  91 int main()
  92 {
  93   test01();
  94   return 0;
  95 }