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118 lines
4.4 KiB
118 lines
4.4 KiB
/*============================================================================= |
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Copyright (c) 2001-2011 Joel de Guzman |
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Distributed under the Boost 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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==============================================================================*/ |
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#if !defined(BOOST_SPIRIT_CHAR_CLASS_APRIL_16_2006_1051AM) |
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#define BOOST_SPIRIT_CHAR_CLASS_APRIL_16_2006_1051AM |
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#if defined(_MSC_VER) |
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#pragma once |
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#endif |
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#include <boost/spirit/home/qi/char/char_parser.hpp> |
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#include <boost/spirit/home/qi/domain.hpp> |
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#include <boost/spirit/home/support/char_class.hpp> |
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#include <boost/spirit/home/support/common_terminals.hpp> |
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#include <boost/spirit/home/support/info.hpp> |
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#include <boost/spirit/home/support/modify.hpp> |
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#include <boost/spirit/home/support/detail/get_encoding.hpp> |
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#include <boost/mpl/eval_if.hpp> |
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namespace boost { namespace spirit |
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{ |
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/////////////////////////////////////////////////////////////////////////// |
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// Enablers |
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/////////////////////////////////////////////////////////////////////////// |
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// enables alnum, alpha, graph, etc. |
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template <typename CharClass, typename CharEncoding> |
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struct use_terminal<qi::domain, tag::char_code<CharClass, CharEncoding> > |
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: mpl::true_ {}; |
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}} |
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namespace boost { namespace spirit { namespace qi |
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{ |
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// hoist the char classification namespaces into qi sub-namespaces of the |
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// same name |
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namespace ascii { using namespace boost::spirit::ascii; } |
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namespace iso8859_1 { using namespace boost::spirit::iso8859_1; } |
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namespace standard { using namespace boost::spirit::standard; } |
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namespace standard_wide { using namespace boost::spirit::standard_wide; } |
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#if defined(BOOST_SPIRIT_UNICODE) |
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namespace unicode { using namespace boost::spirit::unicode; } |
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#endif |
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// Import the standard namespace into the qi namespace. This allows |
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// for default handling of all character/string related operations if not |
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// prefixed with a character set namespace. |
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using namespace boost::spirit::standard; |
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// Import encoding |
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using spirit::encoding; |
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/////////////////////////////////////////////////////////////////////////// |
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// Generic char classification parser (for alnum, alpha, graph, etc.) |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename Tag> |
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struct char_class |
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: char_parser<char_class<Tag>, typename Tag::char_encoding::char_type> |
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{ |
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typedef typename Tag::char_encoding char_encoding; |
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typedef typename Tag::char_class classification; |
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template <typename CharParam, typename Context> |
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bool test(CharParam ch, Context&) const |
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{ |
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using spirit::char_class::classify; |
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return traits::ischar<CharParam, char_encoding>::call(ch) && |
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classify<char_encoding>::is(classification(), ch); |
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} |
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template <typename Context> |
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info what(Context& /*context*/) const |
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{ |
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typedef spirit::char_class::what<char_encoding> what_; |
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return info(what_::is(classification())); |
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} |
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}; |
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namespace detail |
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{ |
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template <typename Tag, bool no_case = false> |
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struct make_char_class : mpl::identity<Tag> {}; |
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template <> |
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struct make_char_class<tag::lower, true> : mpl::identity<tag::alpha> {}; |
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template <> |
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struct make_char_class<tag::upper, true> : mpl::identity<tag::alpha> {}; |
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} |
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/////////////////////////////////////////////////////////////////////////// |
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// Parser generators: make_xxx function (objects) |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename CharClass, typename CharEncoding, typename Modifiers> |
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struct make_primitive<tag::char_code<CharClass, CharEncoding>, Modifiers> |
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{ |
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static bool const no_case = |
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has_modifier<Modifiers, tag::char_code_base<tag::no_case> >::value; |
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typedef typename |
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spirit::detail::get_encoding<Modifiers, CharEncoding>::type |
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char_encoding; |
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typedef tag::char_code< |
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typename detail::make_char_class<CharClass, no_case>::type |
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, char_encoding> |
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tag; |
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typedef char_class<tag> result_type; |
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result_type operator()(unused_type, unused_type) const |
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{ |
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return result_type(); |
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} |
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}; |
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}}} |
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#endif
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