You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and dots ('.'), can be up to 35 characters long. Letters must be lowercase.
83 lines
2.3 KiB
83 lines
2.3 KiB
//----------------------------------------------------------------------------- |
|
// boost variant/detail/apply_visitor_unary.hpp header file |
|
// See http://www.boost.org for updates, documentation, and revision history. |
|
//----------------------------------------------------------------------------- |
|
// |
|
// Copyright (c) 2002-2003 |
|
// Eric Friedman |
|
// |
|
// 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) |
|
|
|
#ifndef BOOST_VARIANT_DETAIL_APPLY_VISITOR_UNARY_HPP |
|
#define BOOST_VARIANT_DETAIL_APPLY_VISITOR_UNARY_HPP |
|
|
|
#include "boost/config.hpp" |
|
#include "boost/detail/workaround.hpp" |
|
#include "boost/variant/detail/generic_result_type.hpp" |
|
|
|
#if BOOST_WORKAROUND(__EDG__, BOOST_TESTED_AT(302)) |
|
#include "boost/utility/enable_if.hpp" |
|
#include "boost/mpl/not.hpp" |
|
#include "boost/type_traits/is_const.hpp" |
|
#endif |
|
|
|
namespace boost { |
|
|
|
////////////////////////////////////////////////////////////////////////// |
|
// function template apply_visitor(visitor, visitable) |
|
// |
|
// Visits visitable with visitor. |
|
// |
|
|
|
// |
|
// nonconst-visitor version: |
|
// |
|
|
|
#if !BOOST_WORKAROUND(__EDG__, BOOST_TESTED_AT(302)) |
|
|
|
# define BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(V) \ |
|
BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(typename V::result_type) \ |
|
/**/ |
|
|
|
#else // EDG-based compilers |
|
|
|
# define BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(V) \ |
|
typename enable_if< \ |
|
mpl::not_< is_const< V > > \ |
|
, BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(typename V::result_type) \ |
|
>::type \ |
|
/**/ |
|
|
|
#endif // EDG-based compilers workaround |
|
|
|
template <typename Visitor, typename Visitable> |
|
inline |
|
BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(Visitor) |
|
apply_visitor(Visitor& visitor, Visitable& visitable) |
|
{ |
|
return visitable.apply_visitor(visitor); |
|
} |
|
|
|
#undef BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE |
|
|
|
// |
|
// const-visitor version: |
|
// |
|
|
|
#if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300) |
|
|
|
template <typename Visitor, typename Visitable> |
|
inline |
|
BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(typename Visitor::result_type) |
|
apply_visitor(const Visitor& visitor, Visitable& visitable) |
|
{ |
|
return visitable.apply_visitor(visitor); |
|
} |
|
|
|
#endif // MSVC7 and below exclusion |
|
|
|
} // namespace boost |
|
|
|
#endif // BOOST_VARIANT_DETAIL_APPLY_VISITOR_UNARY_HPP
|
|
|