is_base_of.hpp
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/*
CLAW - a C++ Library Absolutely Wonderful
CLAW is a free library without any particular aim but being useful to
anyone.
Copyright (C) 2005-2011 Julien Jorge
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
contact: julien.jorge@gamned.org
*/
#ifndef __CLAW_IS_BASE_OF_HPP__
#define __CLAW_IS_BASE_OF_HPP__
namespace claw
{
namespace meta
{
template<typename Base, typename Derived>
struct is_base_of
{
private:
static Derived* m_d;
private:
static char check( Base* );
static long check( ... );
public:
enum
{
result = ( sizeof(check( m_d )) == sizeof(char) )
};
}; // struct is_base_of [false]
} // namespace meta
} // namespace claw
#endif // __CLAW_IS_BASE_OF_HPP__
claw::meta::is_base_of
This predicate tells if a class is derived from an other class.
Definition: is_base_of.hpp:49
claw
This is the main namespace.
Definition: algorithm.hpp:33