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- /*=============================================================================
- Copyright (c) 2001-2014 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_X3_PARSE_APRIL_16_2006_0442PM)
- #define BOOST_SPIRIT_X3_PARSE_APRIL_16_2006_0442PM
- #include <boost/spirit/home/x3/support/context.hpp>
- #include <boost/spirit/home/x3/core/parser.hpp>
- #include <boost/spirit/home/x3/core/skip_over.hpp>
- #include <boost/iterator/iterator_concepts.hpp>
- namespace boost { namespace spirit { namespace x3
- {
- ///////////////////////////////////////////////////////////////////////////
- template <typename Iterator, typename Parser, typename Attribute>
- inline bool
- parse_main(
- Iterator& first
- , Iterator last
- , Parser const& p
- , Attribute& attr)
- {
- // Make sure the iterator is at least a readable forward traversal iterator.
- // If you got a compilation error here, then you are using a weaker iterator
- // while calling this function, you need to supply a readable forward traversal
- // iterator instead.
- BOOST_CONCEPT_ASSERT((boost_concepts::ReadableIteratorConcept<Iterator>));
- BOOST_CONCEPT_ASSERT((boost_concepts::ForwardTraversalConcept<Iterator>));
- // If you get an error no matching function for call to 'as_parser'
- // here, then p is not a parser or there is no suitable conversion
- // from p to a parser.
- return as_parser(p).parse(first, last, unused, unused, attr);
- }
- ///////////////////////////////////////////////////////////////////////////
- template <typename Iterator, typename Parser, typename Attribute>
- inline bool
- parse(
- Iterator& first
- , Iterator last
- , Parser const& p
- , Attribute& attr)
- {
- return parse_main(first, last, p, attr);
- }
- ///////////////////////////////////////////////////////////////////////////
- template <typename Iterator, typename Parser, typename Attribute>
- inline bool
- parse(
- Iterator const& first_
- , Iterator last
- , Parser const& p
- , Attribute& attr)
- {
- Iterator first = first_;
- return parse_main(first, last, p, attr);
- }
- ///////////////////////////////////////////////////////////////////////////
- template <typename Iterator, typename Parser>
- inline bool
- parse(
- Iterator& first
- , Iterator last
- , Parser const& p)
- {
- return parse_main(first, last, p, unused);
- }
- ///////////////////////////////////////////////////////////////////////////
- template <typename Iterator, typename Parser>
- inline bool
- parse(
- Iterator const& first_
- , Iterator last
- , Parser const& p)
- {
- Iterator first = first_;
- return parse_main(first, last, p, unused);
- }
- ///////////////////////////////////////////////////////////////////////////
- enum class skip_flag
- {
- post_skip, // force post-skipping in phrase_parse()
- dont_post_skip // inhibit post-skipping in phrase_parse()
- };
- ///////////////////////////////////////////////////////////////////////////
- template <typename Iterator, typename Parser, typename Skipper, typename Attribute>
- inline bool
- phrase_parse_main(
- Iterator& first
- , Iterator last
- , Parser const& p
- , Skipper const& s
- , Attribute& attr
- , skip_flag post_skip = skip_flag::post_skip)
- {
- // Make sure the iterator is at least a readable forward traversal iterator.
- // If you got a compilation error here, then you are using a weaker iterator
- // while calling this function, you need to supply a readable forward traversal
- // iterator instead.
- BOOST_CONCEPT_ASSERT((boost_concepts::ReadableIteratorConcept<Iterator>));
- BOOST_CONCEPT_ASSERT((boost_concepts::ForwardTraversalConcept<Iterator>));
-
- static_assert(!std::is_same<Skipper, unused_type>::value,
- "Error! Skipper cannot be unused_type.");
- // If you get an error no matching function for call to 'as_parser'
- // here, for either p or s, then p or s is not a parser or there is
- // no suitable conversion from p to a parser.
- auto skipper_ctx = make_context<skipper_tag>(as_parser(s));
- bool r = as_parser(p).parse(first, last, skipper_ctx, unused, attr);
- if (post_skip == skip_flag::post_skip)
- x3::skip_over(first, last, skipper_ctx);
- return r;
- }
- ///////////////////////////////////////////////////////////////////////////
- template <typename Iterator, typename Parser, typename Skipper, typename Attribute>
- inline bool
- phrase_parse(
- Iterator& first
- , Iterator last
- , Parser const& p
- , Skipper const& s
- , Attribute& attr
- , skip_flag post_skip = skip_flag::post_skip)
- {
- return phrase_parse_main(first, last, p, s, attr, post_skip);
- }
- ///////////////////////////////////////////////////////////////////////////
- template <typename Iterator, typename Parser, typename Skipper, typename Attribute>
- inline bool
- phrase_parse(
- Iterator const& first_
- , Iterator last
- , Parser const& p
- , Skipper const& s
- , Attribute& attr
- , skip_flag post_skip = skip_flag::post_skip)
- {
- Iterator first = first_;
- return phrase_parse_main(first, last, p, s, attr, post_skip);
- }
- ///////////////////////////////////////////////////////////////////////////
- template <typename Iterator, typename Parser, typename Skipper>
- inline bool
- phrase_parse(
- Iterator& first
- , Iterator last
- , Parser const& p
- , Skipper const& s
- , skip_flag post_skip = skip_flag::post_skip)
- {
- return phrase_parse_main(first, last, p, s, unused, post_skip);
- }
- ///////////////////////////////////////////////////////////////////////////
- template <typename Iterator, typename Parser, typename Skipper>
- inline bool
- phrase_parse(
- Iterator const& first_
- , Iterator last
- , Parser const& p
- , Skipper const& s
- , skip_flag post_skip = skip_flag::post_skip)
- {
- Iterator first = first_;
- return phrase_parse_main(first, last, p, s, unused, post_skip);
- }
-
- ///////////////////////////////////////////////////////////////////////////
- template <typename Skipper>
- struct phrase_parse_context
- {
- typedef decltype(
- make_context<skipper_tag>(as_parser(std::declval<Skipper>())))
- type;
- };
- }}}
- #endif
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