[857] | 1 |
|
---|
| 2 | // (C) Copyright Steve Cleary, Beman Dawes, Howard Hinnant & John Maddock 2000.
|
---|
| 3 | // Use, modification and distribution are subject to the Boost Software License,
|
---|
| 4 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
|
---|
| 5 | // http://www.boost.org/LICENSE_1_0.txt).
|
---|
| 6 | //
|
---|
| 7 | // See http://www.boost.org/libs/type_traits for most recent version including documentation.
|
---|
| 8 |
|
---|
| 9 | #ifndef BOOST_TT_ADD_REFERENCE_HPP_INCLUDED
|
---|
| 10 | #define BOOST_TT_ADD_REFERENCE_HPP_INCLUDED
|
---|
| 11 |
|
---|
| 12 | #include "boost/type_traits/is_reference.hpp"
|
---|
| 13 | #include "boost/detail/workaround.hpp"
|
---|
| 14 | #include "boost/config.hpp"
|
---|
| 15 |
|
---|
| 16 | // should be the last #include
|
---|
| 17 | #include "boost/type_traits/detail/type_trait_def.hpp"
|
---|
| 18 |
|
---|
| 19 | namespace boost {
|
---|
| 20 |
|
---|
| 21 | namespace detail {
|
---|
| 22 |
|
---|
| 23 | #if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && defined(BOOST_MSVC6_MEMBER_TEMPLATES)
|
---|
| 24 |
|
---|
| 25 | template <bool x>
|
---|
| 26 | struct reference_adder
|
---|
| 27 | {
|
---|
| 28 | template <typename T> struct result_
|
---|
| 29 | {
|
---|
| 30 | typedef T& type;
|
---|
| 31 | };
|
---|
| 32 | };
|
---|
| 33 |
|
---|
| 34 | template <>
|
---|
| 35 | struct reference_adder<true>
|
---|
| 36 | {
|
---|
| 37 | template <typename T> struct result_
|
---|
| 38 | {
|
---|
| 39 | typedef T type;
|
---|
| 40 | };
|
---|
| 41 | };
|
---|
| 42 |
|
---|
| 43 | template <typename T>
|
---|
| 44 | struct add_reference_impl
|
---|
| 45 | {
|
---|
| 46 | typedef typename reference_adder<
|
---|
| 47 | ::boost::is_reference<T>::value
|
---|
| 48 | >::template result_<T> result;
|
---|
| 49 |
|
---|
| 50 | typedef typename result::type type;
|
---|
| 51 | };
|
---|
| 52 |
|
---|
| 53 | #else
|
---|
| 54 |
|
---|
| 55 | template <typename T>
|
---|
| 56 | struct add_reference_impl
|
---|
| 57 | {
|
---|
| 58 | typedef T& type;
|
---|
| 59 | };
|
---|
| 60 |
|
---|
| 61 | #ifndef BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
---|
| 62 | BOOST_TT_AUX_TYPE_TRAIT_IMPL_PARTIAL_SPEC1_1(typename T,add_reference,T&,T&)
|
---|
| 63 | #endif
|
---|
| 64 |
|
---|
| 65 | #endif
|
---|
| 66 |
|
---|
| 67 | // these full specialisations are always required:
|
---|
| 68 | BOOST_TT_AUX_TYPE_TRAIT_IMPL_SPEC1(add_reference,void,void)
|
---|
| 69 | #ifndef BOOST_NO_CV_VOID_SPECIALIZATIONS
|
---|
| 70 | BOOST_TT_AUX_TYPE_TRAIT_IMPL_SPEC1(add_reference,void const,void const)
|
---|
| 71 | BOOST_TT_AUX_TYPE_TRAIT_IMPL_SPEC1(add_reference,void volatile,void volatile)
|
---|
| 72 | BOOST_TT_AUX_TYPE_TRAIT_IMPL_SPEC1(add_reference,void const volatile,void const volatile)
|
---|
| 73 | #endif
|
---|
| 74 |
|
---|
| 75 | } // namespace detail
|
---|
| 76 |
|
---|
| 77 | BOOST_TT_AUX_TYPE_TRAIT_DEF1(add_reference,T,typename detail::add_reference_impl<T>::type)
|
---|
| 78 |
|
---|
| 79 | // agurt, 07/mar/03: workaround Borland's ill-formed sensitivity to an additional
|
---|
| 80 | // level of indirection, here
|
---|
| 81 | #if BOOST_WORKAROUND(__BORLANDC__, < 0x600)
|
---|
| 82 | BOOST_TT_AUX_TYPE_TRAIT_PARTIAL_SPEC1_1(typename T,add_reference,T&,T&)
|
---|
| 83 | #endif
|
---|
| 84 |
|
---|
| 85 | } // namespace boost
|
---|
| 86 |
|
---|
| 87 | #include "boost/type_traits/detail/type_trait_undef.hpp"
|
---|
| 88 |
|
---|
| 89 | #endif // BOOST_TT_ADD_REFERENCE_HPP_INCLUDED
|
---|