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'unlabeled-1.3.2'.

[SVN r9423]
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nobody
2001-03-04 16:05:22 +00:00
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// (C) Copyright David Abrahams 2001. Permission to copy, use, modify,
// sell and distribute this software is granted provided this
// copyright notice appears in all copies. This software is provided
// "as is" without express or implied warranty, and with no claim as
// to its suitability for any purpose.
//
// See http://www.boost.org for most recent version including documentation.
// Revision History
// 09 Feb 01 Applied John Maddock's Borland patch Moving <true>
// specialization to unspecialized template (David Abrahams)
// 06 Feb 01 Created (David Abrahams)
#ifndef SELECT_TYPE_DWA20010206_HPP
# define SELECT_TYPE_DWA20010206_HPP
namespace boost { namespace detail {
// Template class if_true -- select among 2 types based on a bool constant expression
// Usage:
// typename if_true<(bool_const_expression)>::template then<true_type, false_type>::type
template <bool> struct if_true
{
template <class T, class F>
struct then { typedef T type; };
};
template <>
struct if_true<false>
{
template <class T, class F>
struct then { typedef F type; };
};
}}
#endif // SELECT_TYPE_DWA20010206_HPP