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- /*=============================================================================
- Copyright (c) 2001-2011 Joel de Guzman
- Distributed under the Boost Software License, Version 1.0. (See accompanying
- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- ==============================================================================*/
- #if !defined(BOOST_SPIRIT_CHAR_CLASS_APRIL_16_2006_1051AM)
- #define BOOST_SPIRIT_CHAR_CLASS_APRIL_16_2006_1051AM
- #if defined(_MSC_VER)
- #pragma once
- #endif
- #include <boost/spirit/home/qi/char/char_parser.hpp>
- #include <boost/spirit/home/qi/domain.hpp>
- #include <boost/spirit/home/support/char_class.hpp>
- #include <boost/spirit/home/support/common_terminals.hpp>
- #include <boost/spirit/home/support/info.hpp>
- #include <boost/spirit/home/support/modify.hpp>
- #include <boost/spirit/home/support/detail/get_encoding.hpp>
- #include <boost/mpl/eval_if.hpp>
- namespace boost { namespace spirit
- {
- ///////////////////////////////////////////////////////////////////////////
- // Enablers
- ///////////////////////////////////////////////////////////////////////////
- // enables alnum, alpha, graph, etc.
- template <typename CharClass, typename CharEncoding>
- struct use_terminal<qi::domain, tag::char_code<CharClass, CharEncoding> >
- : mpl::true_ {};
- }}
- namespace boost { namespace spirit { namespace qi
- {
- // hoist the char classification namespaces into qi sub-namespaces of the
- // same name
- namespace ascii { using namespace boost::spirit::ascii; }
- namespace iso8859_1 { using namespace boost::spirit::iso8859_1; }
- namespace standard { using namespace boost::spirit::standard; }
- namespace standard_wide { using namespace boost::spirit::standard_wide; }
- #if defined(BOOST_SPIRIT_UNICODE)
- namespace unicode { using namespace boost::spirit::unicode; }
- #endif
- // Import the standard namespace into the qi namespace. This allows
- // for default handling of all character/string related operations if not
- // prefixed with a character set namespace.
- using namespace boost::spirit::standard;
- // Import encoding
- using spirit::encoding;
- ///////////////////////////////////////////////////////////////////////////
- // Generic char classification parser (for alnum, alpha, graph, etc.)
- ///////////////////////////////////////////////////////////////////////////
- template <typename Tag>
- struct char_class
- : char_parser<char_class<Tag>, typename Tag::char_encoding::char_type>
- {
- typedef typename Tag::char_encoding char_encoding;
- typedef typename Tag::char_class classification;
- template <typename CharParam, typename Context>
- bool test(CharParam ch, Context&) const
- {
- using spirit::char_class::classify;
- return traits::ischar<CharParam, char_encoding>::call(ch) &&
- classify<char_encoding>::is(classification(), ch);
- }
- template <typename Context>
- info what(Context& /*context*/) const
- {
- typedef spirit::char_class::what<char_encoding> what_;
- return info(what_::is(classification()));
- }
- };
- namespace detail
- {
- template <typename Tag, bool no_case = false>
- struct make_char_class : mpl::identity<Tag> {};
- template <>
- struct make_char_class<tag::lower, true> : mpl::identity<tag::alpha> {};
- template <>
- struct make_char_class<tag::upper, true> : mpl::identity<tag::alpha> {};
- }
- ///////////////////////////////////////////////////////////////////////////
- // Parser generators: make_xxx function (objects)
- ///////////////////////////////////////////////////////////////////////////
- template <typename CharClass, typename CharEncoding, typename Modifiers>
- struct make_primitive<tag::char_code<CharClass, CharEncoding>, Modifiers>
- {
- static bool const no_case =
- has_modifier<Modifiers, tag::char_code_base<tag::no_case> >::value;
- typedef typename
- spirit::detail::get_encoding<Modifiers, CharEncoding>::type
- char_encoding;
- typedef tag::char_code<
- typename detail::make_char_class<CharClass, no_case>::type
- , char_encoding>
- tag;
- typedef char_class<tag> result_type;
- result_type operator()(unused_type, unused_type) const
- {
- return result_type();
- }
- };
- }}}
- #endif
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