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annotate DEPENDENCIES/generic/include/boost/flyweight/detail/is_placeholder_expr.hpp @ 133:4acb5d8d80b6 tip
Don't fail environmental check if README.md exists (but .txt and no-suffix don't)
| author | Chris Cannam |
|---|---|
| date | Tue, 30 Jul 2019 12:25:44 +0100 |
| parents | c530137014c0 |
| children |
| rev | line source |
|---|---|
| Chris@16 | 1 /* Copyright 2006-2009 Joaquin M Lopez Munoz. |
| Chris@16 | 2 * Distributed under the Boost Software License, Version 1.0. |
| Chris@16 | 3 * (See accompanying file LICENSE_1_0.txt or copy at |
| Chris@16 | 4 * http://www.boost.org/LICENSE_1_0.txt) |
| Chris@16 | 5 * |
| Chris@16 | 6 * See http://www.boost.org/libs/flyweight for library home page. |
| Chris@16 | 7 */ |
| Chris@16 | 8 |
| Chris@16 | 9 #ifndef BOOST_FLYWEIGHT_DETAIL_IS_PLACEHOLDER_EXPR_HPP |
| Chris@16 | 10 #define BOOST_FLYWEIGHT_DETAIL_IS_PLACEHOLDER_EXPR_HPP |
| Chris@16 | 11 |
| Chris@101 | 12 #if defined(_MSC_VER) |
| Chris@16 | 13 #pragma once |
| Chris@16 | 14 #endif |
| Chris@16 | 15 |
| Chris@16 | 16 #include <boost/type_traits/is_same.hpp> |
| Chris@16 | 17 #include <boost/mpl/apply.hpp> |
| Chris@16 | 18 #include <boost/mpl/aux_/lambda_support.hpp> |
| Chris@16 | 19 #include <boost/mpl/not.hpp> |
| Chris@16 | 20 #include <boost/preprocessor/facilities/intercept.hpp> |
| Chris@16 | 21 #include <boost/preprocessor/repetition/enum_params.hpp> |
| Chris@16 | 22 |
| Chris@16 | 23 namespace boost{ |
| Chris@16 | 24 |
| Chris@16 | 25 namespace flyweights{ |
| Chris@16 | 26 |
| Chris@16 | 27 namespace detail{ |
| Chris@16 | 28 |
| Chris@16 | 29 /* is_placeholder_expression<T> indicates whether T is an |
| Chris@16 | 30 * MPL placeholder expression. |
| Chris@16 | 31 */ |
| Chris@16 | 32 |
| Chris@16 | 33 template<typename T> |
| Chris@16 | 34 struct is_placeholder_expression_helper |
| Chris@16 | 35 { |
| Chris@16 | 36 template< |
| Chris@16 | 37 BOOST_PP_ENUM_PARAMS( |
| Chris@16 | 38 BOOST_MPL_LIMIT_METAFUNCTION_ARITY,typename BOOST_PP_INTERCEPT) |
| Chris@16 | 39 > |
| Chris@16 | 40 struct apply{ |
| Chris@16 | 41 typedef int type; |
| Chris@16 | 42 }; |
| Chris@16 | 43 |
| Chris@16 | 44 BOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_placeholder_expression_helper,(T)) |
| Chris@16 | 45 }; |
| Chris@16 | 46 |
| Chris@16 | 47 template<typename T> |
| Chris@16 | 48 struct is_placeholder_expression: |
| Chris@16 | 49 mpl::not_<is_same< |
| Chris@16 | 50 typename mpl::apply< |
| Chris@16 | 51 is_placeholder_expression_helper<T>, |
| Chris@16 | 52 BOOST_PP_ENUM_PARAMS( |
| Chris@16 | 53 BOOST_MPL_LIMIT_METAFUNCTION_ARITY,int BOOST_PP_INTERCEPT) |
| Chris@16 | 54 >::type, |
| Chris@16 | 55 int |
| Chris@16 | 56 > > |
| Chris@16 | 57 {}; |
| Chris@16 | 58 |
| Chris@16 | 59 } /* namespace flyweights::detail */ |
| Chris@16 | 60 |
| Chris@16 | 61 } /* namespace flyweights */ |
| Chris@16 | 62 |
| Chris@16 | 63 } /* namespace boost */ |
| Chris@16 | 64 |
| Chris@16 | 65 #endif |