libstdc++-v3/testsuite/tr1/3_function_objects/reference_wrapper/typedefs.cc

   1 // 2005-02-27 Douglas Gregor <doug.gregor -at- gmail.com>
   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 // 2.1 reference wrappers
  22 #include <tr1/functional>
  23 #include <tr1/type_traits>
  24 #include <testsuite_hooks.h>
  25 #include <testsuite_tr1.h>
  26
  27 using namespace __gnu_test;
  28
  29 struct X {};
  30
  31 struct int_result_type { typedef int result_type; };
  32
  33 struct derives_unary : std::unary_function<int, int> {};
  34
  35 struct derives_binary : std::binary_function<int, float, int> {};
  36
  37 struct derives_unary_binary
  38   : std::unary_function<int, int>,
  39     std::binary_function<int, float, int>
  40 {
  41   typedef int result_type;
  42 };
  43
  44 void test01()
  45 {
  46   bool test __attribute__((unused)) = true;
  47
  48   using std::tr1::reference_wrapper;
  49   using std::tr1::is_same;
  50   using std::tr1::is_convertible;
  51   using std::unary_function;
  52   using std::binary_function;
  53
  54   // Check result_type typedef
  55   VERIFY((is_same<reference_wrapper<int_result_type>::result_type, int>::value));
  56   VERIFY((is_same<reference_wrapper<derives_unary>::result_type, int>::value));
  57   VERIFY((is_same<reference_wrapper<derives_binary>::result_type, int>::value));
  58   VERIFY((is_same<reference_wrapper<derives_unary_binary>::result_type, int>::value));
  59   VERIFY((is_same<reference_wrapper<int(void)>::result_type, int>::value));
  60   VERIFY((is_same<reference_wrapper<int(*)(void)>::result_type, int>::value));
  61   VERIFY((is_same<reference_wrapper<int (::X::*)()>::result_type, int>::value));
  62   VERIFY((is_same<reference_wrapper<int (::X::*)(float)>::result_type, int>::value));
  63
  64   // Check derivation from unary_function
  65   VERIFY((is_convertible<reference_wrapper<derives_unary>*, unary_function<int, int>*>::value));
  66   VERIFY((is_convertible<reference_wrapper<derives_unary_binary>*, unary_function<int, int>*>::value));
  67   VERIFY((is_convertible<reference_wrapper<int(int)>*, unary_function<int, int>*>::value));
  68   VERIFY((is_convertible<reference_wrapper<int(*)(int)>*, unary_function<int, int>*>::value));
  69   VERIFY((is_convertible<reference_wrapper<int (::X::*)()>*, unary_function< ::X*, int>*>::value));
  70   VERIFY((is_convertible<reference_wrapper<int (::X::*)() const>*, unary_function<const ::X*, int>*>::value));
  71   VERIFY((is_convertible<reference_wrapper<int (::X::*)() volatile>*, unary_function<volatile ::X*, int>*>::value));
  72   VERIFY((is_convertible<reference_wrapper<int (::X::*)() const volatile>*, unary_function<const volatile ::X*, int>*>::value));
  73
  74   // Check derivation from binary_function
  75   VERIFY((is_convertible<reference_wrapper<derives_binary>*, binary_function<int, float, int>*>::value));
  76   VERIFY((is_convertible<reference_wrapper<derives_unary_binary>*, binary_function<int, float, int>*>::value));
  77   VERIFY((is_convertible<reference_wrapper<int(int, float)>*, binary_function<int, float, int>*>::value));
  78   VERIFY((is_convertible<reference_wrapper<int(*)(int, float)>*, binary_function<int, float, int>*>::value));
  79   VERIFY((is_convertible<reference_wrapper<int (::X::*)(float)>*, binary_function< ::X*, float, int>*>::value));
  80   VERIFY((is_convertible<reference_wrapper<int (::X::*)(float) const>*, binary_function<const ::X*, float, int>*>::value));
  81   VERIFY((is_convertible<reference_wrapper<int (::X::*)(float) volatile>*, binary_function<volatile ::X*, float, int>*>::value));
  82   VERIFY((is_convertible<reference_wrapper<int (::X::*)(float) const volatile>*, binary_function<const volatile ::X*, float, int>*>::value));
  83 }
  84
  85 int main()
  86 {
  87   test01();
  88   return 0;
  89 }