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| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | /////////////////////////////////////////////////////////////////////////////// |
| 2 | // as_inverse.hpp | |
| 3 | // | |
| 4 | // Copyright 2008 Eric Niebler. Distributed under the Boost | |
| 5 | // Software License, Version 1.0. (See accompanying file | |
| 6 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 7 | ||
| 8 | #ifndef BOOST_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_INVERSE_HPP_EAN_04_05_2007 | |
| 9 | #define BOOST_XPRESSIVE_DETAIL_STATIC_TRANSFORMS_AS_INVERSE_HPP_EAN_04_05_2007 | |
| 10 | ||
| 11 | // MS compatible compilers support #pragma once | |
| 12 | #if defined(_MSC_VER) | |
| 13 | # pragma once | |
| 14 | #endif | |
| 15 | ||
| 16 | #include <boost/mpl/sizeof.hpp> | |
| 17 | #include <boost/mpl/not.hpp> | |
| 18 | #include <boost/xpressive/detail/detail_fwd.hpp> | |
| 19 | #include <boost/xpressive/detail/static/static.hpp> | |
| 20 | #include <boost/proto/core.hpp> | |
| 21 | ||
| 22 | #define UNCV(x) typename remove_const<x>::type | |
| 23 | #define UNREF(x) typename remove_reference<x>::type | |
| 24 | #define UNCVREF(x) UNCV(UNREF(x)) | |
| 25 | ||
| 26 | namespace boost { namespace xpressive { namespace grammar_detail | |
| 27 | { | |
| 28 | ||
| 29 | template<typename T> | |
| 30 | struct inverter | |
| 31 | { | |
| 32 | typedef T type; | |
| 33 | static T call(T t) | |
| 34 | { | |
| 35 | t.inverse(); | |
| 36 | return t; | |
| 37 | } | |
| 38 | }; | |
| 39 | ||
| 40 | template<typename Traits, typename ICase, typename Not> | |
| 41 | struct inverter<detail::literal_matcher<Traits, ICase, Not> > | |
| 42 | { | |
| 43 | typedef detail::literal_matcher<Traits, ICase, typename mpl::not_<Not>::type> type; | |
| 44 | static type call(detail::literal_matcher<Traits, ICase, Not> t) | |
| 45 | { | |
| 46 | return type(t.ch_); | |
| 47 | } | |
| 48 | }; | |
| 49 | ||
| 50 | template<typename Traits> | |
| 51 | struct inverter<detail::logical_newline_matcher<Traits> > | |
| 52 | { | |
| 53 | // ~_ln matches any one character that is not in the "newline" character class | |
| 54 | typedef detail::posix_charset_matcher<Traits> type; | |
| 55 | static type call(detail::logical_newline_matcher<Traits> t) | |
| 56 | { | |
| 57 | return type(t.newline(), true); | |
| 58 | } | |
| 59 | }; | |
| 60 | ||
| 61 | template<typename Traits> | |
| 62 | struct inverter<detail::assert_word_matcher<detail::word_boundary<mpl::true_>, Traits> > | |
| 63 | { | |
| 64 | typedef detail::assert_word_matcher<detail::word_boundary<mpl::false_>, Traits> type; | |
| 65 | static type call(detail::assert_word_matcher<detail::word_boundary<mpl::true_>, Traits> t) | |
| 66 | { | |
| 67 | return type(t.word()); | |
| 68 | } | |
| 69 | }; | |
| 70 | ||
| 71 | struct as_inverse : proto::callable | |
| 72 | { | |
| 73 | template<typename Sig> | |
| 74 | struct result; | |
| 75 | ||
| 76 | template<typename This, typename Matcher> | |
| 77 | struct result<This(Matcher)> | |
| 78 | : inverter<UNCVREF(Matcher)> | |
| 79 | {}; | |
| 80 | ||
| 81 | template<typename Matcher> | |
| 82 | typename inverter<Matcher>::type operator ()(Matcher const &matcher) const | |
| 83 | { | |
| 84 | return inverter<Matcher>::call(matcher); | |
| 85 | } | |
| 86 | }; | |
| 87 | ||
| 88 | }}} | |
| 89 | ||
| 90 | #undef UNCV | |
| 91 | #undef UNREF | |
| 92 | #undef UNCVREF | |
| 93 | ||
| 94 | #endif |