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3rdparty/boost_1_81_0/libs/mpl/test/always.cpp 1.31 KB
73ef4ff3   Hu Chunming   提交三方库
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  // Copyright Aleksey Gurtovoy 2000-2004
  //
  // Distributed under the Boost Software License, Version 1.0.
  // (See accompanying file LICENSE_1_0.txt or copy at
  // http://www.boost.org/LICENSE_1_0.txt)
  //
  // See http://www.boost.org/libs/mpl for documentation.
  
  // $Id$
  // $Date$
  // $Revision$
  
  #include <boost/mpl/apply.hpp>
  #include <boost/mpl/always.hpp>
  #include <boost/mpl/bool.hpp>
  #include <boost/mpl/int.hpp>
  
  #include <boost/mpl/aux_/test.hpp>
  
  MPL_TEST_CASE()
  {
      typedef always<true_> always_true;
  
      MPL_ASSERT(( apply< always_true > ));
      MPL_ASSERT(( apply0< always_true > ));
      MPL_ASSERT(( apply1< always_true,false_ > ));
      MPL_ASSERT(( apply2< always_true,false_,false_ > ));
      MPL_ASSERT(( apply3< always_true,false_,false_,false_ > ));
  }
  
  
  MPL_TEST_CASE()
  {
      typedef always< int_<10> > always_10;
  
      typedef apply< always_10 >::type res;
      typedef apply0< always_10 >::type res0;
      typedef apply1< always_10,int_<0> >::type res1;
      typedef apply2< always_10,int_<0>,int_<0> >::type res2;
      typedef apply3< always_10,int_<0>,int_<0>,int_<0> >::type res3;
  
      MPL_ASSERT_RELATION( res::value, ==, 10 );
      MPL_ASSERT_RELATION( res0::value, ==, 10 );
      MPL_ASSERT_RELATION( res1::value, ==, 10 );
      MPL_ASSERT_RELATION( res2::value, ==, 10 );
      MPL_ASSERT_RELATION( res3::value, ==, 10 );
  }