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312 lines
11 KiB
312 lines
11 KiB
/*============================================================================= |
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Copyright (c) 2001-2011 Joel de Guzman |
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Copyright (c) 2001-2011 Hartmut Kaiser |
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Copyright (c) 2010 Bryce Lelbach |
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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_LIT_APR_18_2006_1125PM) |
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#define BOOST_SPIRIT_LIT_APR_18_2006_1125PM |
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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/domain.hpp> |
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#include <boost/spirit/home/qi/skip_over.hpp> |
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#include <boost/spirit/home/qi/detail/string_parse.hpp> |
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#include <boost/spirit/home/qi/parser.hpp> |
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#include <boost/spirit/home/qi/meta_compiler.hpp> |
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#include <boost/spirit/home/qi/auxiliary/lazy.hpp> |
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#include <boost/spirit/home/qi/detail/enable_lit.hpp> |
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#include <boost/spirit/home/support/info.hpp> |
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#include <boost/spirit/home/support/char_class.hpp> |
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#include <boost/spirit/home/support/modify.hpp> |
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#include <boost/spirit/home/support/unused.hpp> |
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#include <boost/spirit/home/support/common_terminals.hpp> |
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#include <boost/spirit/home/support/string_traits.hpp> |
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#include <boost/spirit/home/support/detail/get_encoding.hpp> |
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#include <boost/spirit/home/support/handles_container.hpp> |
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#include <boost/fusion/include/at.hpp> |
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#include <boost/fusion/include/value_at.hpp> |
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#include <boost/type_traits/add_reference.hpp> |
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#include <boost/type_traits/add_const.hpp> |
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#include <boost/mpl/assert.hpp> |
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#include <boost/mpl/if.hpp> |
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#include <boost/detail/workaround.hpp> |
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#include <boost/utility/enable_if.hpp> |
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#include <string> |
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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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template <typename T> |
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struct use_terminal<qi::domain, T |
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, typename enable_if<traits::is_string<T> >::type> // enables strings |
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: mpl::true_ {}; |
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template <typename CharEncoding, typename A0> |
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struct use_terminal<qi::domain |
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, terminal_ex< |
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tag::char_code<tag::string, CharEncoding> // enables string(str) |
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, fusion::vector1<A0> > |
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> : traits::is_string<A0> {}; |
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template <typename CharEncoding> // enables string(f) |
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struct use_lazy_terminal< |
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qi::domain |
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, tag::char_code<tag::string, CharEncoding> |
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, 1 /*arity*/ |
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> : mpl::true_ {}; |
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// enables lit(...) |
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template <typename A0> |
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struct use_terminal<qi::domain |
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, terminal_ex<tag::lit, fusion::vector1<A0> > |
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, typename enable_if<traits::is_string<A0> >::type> |
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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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#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS |
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using spirit::lit; |
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#endif |
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using spirit::lit_type; |
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/////////////////////////////////////////////////////////////////////////// |
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// Parse for literal strings |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename String, bool no_attribute> |
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struct literal_string |
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: primitive_parser<literal_string<String, no_attribute> > |
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{ |
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typedef typename |
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remove_const<typename traits::char_type_of<String>::type>::type |
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char_type; |
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typedef std::basic_string<char_type> string_type; |
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literal_string(typename add_reference<String>::type str) |
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: str(str) |
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{} |
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template <typename Context, typename Iterator> |
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struct attribute |
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{ |
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typedef typename mpl::if_c< |
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no_attribute, unused_type, string_type>::type |
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type; |
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}; |
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template <typename Iterator, typename Context |
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, typename Skipper, typename Attribute> |
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bool parse(Iterator& first, Iterator const& last |
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, Context& /*context*/, Skipper const& skipper, Attribute& attr) const |
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{ |
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qi::skip_over(first, last, skipper); |
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return detail::string_parse(str, first, last, attr); |
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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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return info("literal-string", str); |
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} |
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String str; |
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private: |
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// silence MSVC warning C4512: assignment operator could not be generated |
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literal_string& operator= (literal_string const&); |
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}; |
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template <typename String, bool no_attribute> |
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struct no_case_literal_string |
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: primitive_parser<no_case_literal_string<String, no_attribute> > |
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{ |
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typedef typename |
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remove_const<typename traits::char_type_of<String>::type>::type |
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char_type; |
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typedef std::basic_string<char_type> string_type; |
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template <typename CharEncoding> |
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no_case_literal_string(char_type const* in, CharEncoding encoding) |
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: str_lo(in) |
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, str_hi(in) |
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{ |
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#if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1600)) |
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encoding; // suppresses warning: C4100: 'encoding' : unreferenced formal parameter |
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#endif |
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typename string_type::iterator loi = str_lo.begin(); |
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typename string_type::iterator hii = str_hi.begin(); |
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for (; loi != str_lo.end(); ++loi, ++hii, ++in) |
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{ |
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typedef typename CharEncoding::char_type encoded_char_type; |
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*loi = static_cast<char_type>(encoding.tolower(encoded_char_type(*loi))); |
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*hii = static_cast<char_type>(encoding.toupper(encoded_char_type(*hii))); |
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} |
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} |
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template <typename Context, typename Iterator> |
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struct attribute |
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{ |
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typedef typename mpl::if_c< |
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no_attribute, unused_type, string_type>::type |
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type; |
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}; |
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template <typename Iterator, typename Context |
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, typename Skipper, typename Attribute> |
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bool parse(Iterator& first, Iterator const& last |
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, Context& /*context*/, Skipper const& skipper, Attribute& attr) const |
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{ |
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qi::skip_over(first, last, skipper); |
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return detail::string_parse(str_lo, str_hi, first, last, attr); |
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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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return info("no-case-literal-string", str_lo); |
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} |
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string_type str_lo, str_hi; |
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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 T, typename Modifiers> |
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struct make_primitive<T, Modifiers |
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, typename enable_if<traits::is_string<T> >::type> |
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{ |
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typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case; |
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typedef typename add_const<T>::type const_string; |
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typedef typename mpl::if_< |
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no_case |
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, no_case_literal_string<const_string, true> |
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, literal_string<const_string, true> >::type |
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result_type; |
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result_type operator()( |
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typename add_reference<const_string>::type str, unused_type) const |
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{ |
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return op(str, no_case()); |
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} |
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template <typename String> |
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result_type op(String const& str, mpl::false_) const |
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{ |
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return result_type(str); |
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} |
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template <typename String> |
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result_type op(String const& str, mpl::true_) const |
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{ |
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typename spirit::detail::get_encoding<Modifiers, |
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spirit::char_encoding::standard>::type encoding; |
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return result_type(traits::get_c_string(str), encoding); |
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} |
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}; |
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// lit("...") |
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template <typename Modifiers, typename A0> |
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struct make_primitive< |
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terminal_ex<tag::lit, fusion::vector1<A0> > |
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, Modifiers |
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, typename enable_if<traits::is_string<A0> >::type> |
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{ |
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typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case; |
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typedef typename add_const<A0>::type const_string; |
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typedef typename mpl::if_< |
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no_case |
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, no_case_literal_string<const_string, true> |
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, literal_string<const_string, true> >::type |
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result_type; |
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template <typename Terminal> |
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result_type operator()(Terminal const& term, unused_type) const |
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{ |
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return op(fusion::at_c<0>(term.args), no_case()); |
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} |
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template <typename String> |
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result_type op(String const& str, mpl::false_) const |
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{ |
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return result_type(str); |
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} |
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template <typename String> |
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result_type op(String const& str, mpl::true_) const |
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{ |
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typedef typename traits::char_encoding_from_char< |
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typename traits::char_type_of<A0>::type>::type encoding_type; |
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typename spirit::detail::get_encoding<Modifiers, |
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encoding_type>::type encoding; |
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return result_type(traits::get_c_string(str), encoding); |
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} |
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}; |
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/////////////////////////////////////////////////////////////////////////// |
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// string("...") |
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template <typename CharEncoding, typename Modifiers, typename A0> |
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struct make_primitive< |
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terminal_ex< |
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tag::char_code<tag::string, CharEncoding> |
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, fusion::vector1<A0> > |
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, Modifiers> |
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{ |
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typedef CharEncoding encoding; |
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typedef has_modifier<Modifiers, tag::char_code_base<tag::no_case> > no_case; |
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typedef typename add_const<A0>::type const_string; |
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typedef typename mpl::if_< |
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no_case |
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, no_case_literal_string<const_string, false> |
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, literal_string<const_string, false> >::type |
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result_type; |
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template <typename Terminal> |
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result_type operator()(Terminal const& term, unused_type) const |
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{ |
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return op(fusion::at_c<0>(term.args), no_case()); |
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} |
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template <typename String> |
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result_type op(String const& str, mpl::false_) const |
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{ |
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return result_type(str); |
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} |
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template <typename String> |
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result_type op(String const& str, mpl::true_) const |
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{ |
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return result_type(traits::get_c_string(str), encoding()); |
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} |
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}; |
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}}} |
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namespace boost { namespace spirit { namespace traits |
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{ |
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/////////////////////////////////////////////////////////////////////////// |
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template <typename String, bool no_attribute, typename Attribute |
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,typename Context, typename Iterator> |
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struct handles_container<qi::literal_string<String, no_attribute> |
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, Attribute, Context, Iterator> |
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: mpl::true_ {}; |
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template <typename String, bool no_attribute, typename Attribute |
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, typename Context, typename Iterator> |
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struct handles_container<qi::no_case_literal_string<String, no_attribute> |
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, Attribute, Context, Iterator> |
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: mpl::true_ {}; |
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}}} |
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#endif
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