| author | Mike Kinghan <mikek@symbian.org> |
| Tue, 13 Jul 2010 15:21:54 +0100 | |
| changeset 24 | 936784880b21 |
| parent 2 | 39c28ec933dd |
| permissions | -rwxr-xr-x |
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// Copyright David Abrahams 2005. Distributed under the Boost |
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// 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 BOOST_DETAIL_IS_XXX_DWA20051011_HPP |
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# define BOOST_DETAIL_IS_XXX_DWA20051011_HPP |
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# include <boost/config.hpp> |
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# include <boost/mpl/bool.hpp> |
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# include <boost/preprocessor/enum_params.hpp> |
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# if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) |
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# include <boost/type_traits/is_reference.hpp> |
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# include <boost/type_traits/add_reference.hpp> |
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# define BOOST_DETAIL_IS_XXX_DEF(name, qualified_name, nargs) \ |
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template <class X_> \ |
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struct is_##name \ |
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{ \
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typedef char yes; \ |
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typedef char (&no)[2]; \ |
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\ |
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static typename add_reference<X_>::type dummy; \ |
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\ |
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struct helpers \ |
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{ \
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template < BOOST_PP_ENUM_PARAMS_Z(1, nargs, class U) > \ |
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static yes test( \ |
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qualified_name< BOOST_PP_ENUM_PARAMS_Z(1, nargs, U) >&, int \ |
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); \ |
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\ |
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template <class U> \ |
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static no test(U&, ...); \ |
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}; \ |
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\ |
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BOOST_STATIC_CONSTANT( \ |
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bool, value \ |
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= !is_reference<X_>::value \ |
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& (sizeof(helpers::test(dummy, 0)) == sizeof(yes))); \ |
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\ |
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typedef mpl::bool_<value> type; \ |
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}; |
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# else |
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# define BOOST_DETAIL_IS_XXX_DEF(name, qualified_name, nargs) \ |
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template <class T> \ |
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struct is_##name : mpl::false_ \ |
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{ \
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}; \ |
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\ |
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template < BOOST_PP_ENUM_PARAMS_Z(1, nargs, class T) > \ |
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struct is_##name< \ |
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qualified_name< BOOST_PP_ENUM_PARAMS_Z(1, nargs, T) > \ |
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> \ |
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: mpl::true_ \ |
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{ \
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}; |
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# endif |
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#endif // BOOST_DETAIL_IS_XXX_DWA20051011_HPP |