[857] | 1 | //-----------------------------------------------------------------------------
|
---|
| 2 | // boost variant/detail/apply_visitor_unary.hpp header file
|
---|
| 3 | // See http://www.boost.org for updates, documentation, and revision history.
|
---|
| 4 | //-----------------------------------------------------------------------------
|
---|
| 5 | //
|
---|
| 6 | // Copyright (c) 2002-2003
|
---|
| 7 | // Eric Friedman
|
---|
| 8 | //
|
---|
| 9 | // Distributed under the Boost Software License, Version 1.0. (See
|
---|
| 10 | // accompanying file LICENSE_1_0.txt or copy at
|
---|
| 11 | // http://www.boost.org/LICENSE_1_0.txt)
|
---|
| 12 |
|
---|
| 13 | #ifndef BOOST_VARIANT_DETAIL_APPLY_VISITOR_UNARY_HPP
|
---|
| 14 | #define BOOST_VARIANT_DETAIL_APPLY_VISITOR_UNARY_HPP
|
---|
| 15 |
|
---|
| 16 | #include "boost/config.hpp"
|
---|
| 17 | #include "boost/detail/workaround.hpp"
|
---|
| 18 | #include "boost/variant/detail/generic_result_type.hpp"
|
---|
| 19 |
|
---|
| 20 | #include "boost/utility/enable_if.hpp"
|
---|
| 21 |
|
---|
| 22 | namespace boost {
|
---|
| 23 |
|
---|
| 24 | //////////////////////////////////////////////////////////////////////////
|
---|
| 25 | // function template apply_visitor(visitor, visitable)
|
---|
| 26 | //
|
---|
| 27 | // Visits visitable with visitor.
|
---|
| 28 | //
|
---|
| 29 |
|
---|
| 30 | //
|
---|
| 31 | // nonconst-visitor version:
|
---|
| 32 | //
|
---|
| 33 |
|
---|
| 34 | #if !BOOST_WORKAROUND(__EDG__, BOOST_TESTED_AT(302))
|
---|
| 35 |
|
---|
| 36 | # define BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(V) \
|
---|
| 37 | BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(typename V::result_type) \
|
---|
| 38 | /**/
|
---|
| 39 |
|
---|
| 40 | #else // EDG-based compilers
|
---|
| 41 |
|
---|
| 42 | # define BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(V) \
|
---|
| 43 | typename enable_if< \
|
---|
| 44 | mpl::not_< is_const< V > > \
|
---|
| 45 | , BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(typename V::result_type) \
|
---|
| 46 | >::type \
|
---|
| 47 | /**/
|
---|
| 48 |
|
---|
| 49 | #endif // EDG-based compilers workaround
|
---|
| 50 |
|
---|
| 51 | template <typename Visitor, typename Visitable>
|
---|
| 52 | inline
|
---|
| 53 | BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(Visitor)
|
---|
| 54 | apply_visitor(Visitor& visitor, Visitable& visitable)
|
---|
| 55 | {
|
---|
| 56 | return visitable.apply_visitor(visitor);
|
---|
| 57 | }
|
---|
| 58 |
|
---|
| 59 | #undef BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE
|
---|
| 60 |
|
---|
| 61 | //
|
---|
| 62 | // const-visitor version:
|
---|
| 63 | //
|
---|
| 64 |
|
---|
| 65 | #if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
|
---|
| 66 |
|
---|
| 67 | template <typename Visitor, typename Visitable>
|
---|
| 68 | inline
|
---|
| 69 | BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(typename Visitor::result_type)
|
---|
| 70 | apply_visitor(const Visitor& visitor, Visitable& visitable)
|
---|
| 71 | {
|
---|
| 72 | return visitable.apply_visitor(visitor);
|
---|
| 73 | }
|
---|
| 74 |
|
---|
| 75 | #endif // MSVC7 and below exclusion
|
---|
| 76 |
|
---|
| 77 | } // namespace boost
|
---|
| 78 |
|
---|
| 79 | #endif // BOOST_VARIANT_DETAIL_APPLY_VISITOR_UNARY_HPP
|
---|