forked from boostorg/mpl
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/int_c.hpp header file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2000-02
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// Aleksey Gurtovoy
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appears in all copies and
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// that both the copyright notice and this permission notice appear in
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// supporting documentation. No representations are made about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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#ifndef BOOST_MPL_INT_C_HPP_INCLUDED
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#define BOOST_MPL_INT_C_HPP_INCLUDED
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#include "boost/config.hpp"
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namespace boost {
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namespace mpl {
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template< int N >
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struct int_c
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{
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BOOST_STATIC_CONSTANT(int, value = N);
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typedef int_c type;
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typedef int value_type;
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// have to #ifdef here: some compilers don't like the 'N + 1' form (MSVC),
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// while some other don't like 'value + 1' (Borland), and some don't like
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// either
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#if defined(__EDG_VERSION__) && __EDG_VERSION__ <= 243
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private:
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BOOST_STATIC_CONSTANT(T, next_value = (N + 1));
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BOOST_STATIC_CONSTANT(T, prior_value = (N - 1));
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public:
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typedef int_c<next_value> next;
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typedef int_c<prior_value> prior;
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#elif defined(__BORLANDC__) && (__BORLANDC__ <= 0x561 || !defined(BOOST_STRICT_CONFIG)) \
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|| defined(__IBMCPP__) && (__IBMCPP__ <= 502 || !defined(BOOST_STRICT_CONFIG))
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typedef int_c<(N + 1)> next;
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typedef int_c<(N - 1)> prior;
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#else
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typedef int_c<(value + 1)> next;
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typedef int_c<(value - 1)> prior;
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#endif
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operator int() const { return this->value; }
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};
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} // namespace mpl
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} // namespace boost
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#endif // BOOST_MPL_INT_C_HPP_INCLUDED
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