312 lines
11 KiB
C++
312 lines
11 KiB
C++
/*=============================================================================
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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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// silence MSVC warning C4512: assignment operator could not be generated
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BOOST_DELETED_FUNCTION(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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(void)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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