forked from boostorg/exception
70 lines
1.7 KiB
C++
70 lines
1.7 KiB
C++
//Copyright (c) 2006-2008 Emil Dotchevski and Reverge Studios, Inc.
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//Distributed under the Boost Software License, Version 1.0. (See accompanying
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//file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef UUID_0C5D492E909711DCB658AD4556D89593
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#define UUID_0C5D492E909711DCB658AD4556D89593
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#include <boost/exception/exception.hpp>
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namespace
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boost
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{
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namespace
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exception_detail
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{
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template <class T>
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struct
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error_info_injector:
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public T,
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public exception
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{
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explicit
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error_info_injector( T const & x ):
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T(x)
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{
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}
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};
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struct large_size { char c[256]; };
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large_size dispatch( exception * );
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struct small_size { };
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small_size dispatch( void * );
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template <class,size_t>
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struct enable_error_info_helper;
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template <class T>
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struct
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enable_error_info_helper<T,sizeof(large_size)>
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{
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typedef T type;
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};
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template <class T>
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struct
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enable_error_info_helper<T,sizeof(small_size)>
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{
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typedef error_info_injector<T> type;
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};
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template <class T>
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struct
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enable_error_info_return_type
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{
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typedef typename enable_error_info_helper<T,sizeof(dispatch((T*)0))>::type type;
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};
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}
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template <class T>
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typename exception_detail::enable_error_info_return_type<T>::type
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enable_error_info( T const & x )
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{
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return typename exception_detail::enable_error_info_return_type<T>::type(x);
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}
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}
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#endif
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