/Src/Dependencies/Boost/boost/spirit/home/qi/operator/list.hpp
http://hadesmem.googlecode.com/ · C++ Header · 135 lines · 96 code · 19 blank · 20 comment · 4 complexity · 2300b8fa52ef12bbf7c36017136aa219 MD5 · raw file
- /*=============================================================================
- Copyright (c) 2001-2011 Joel de Guzman
- Copyright (c) 2001-2011 Hartmut Kaiser
- 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(SPIRIT_LIST_MARCH_24_2007_1031AM)
- #define SPIRIT_LIST_MARCH_24_2007_1031AM
- #if defined(_MSC_VER)
- #pragma once
- #endif
- #include <boost/spirit/home/qi/meta_compiler.hpp>
- #include <boost/spirit/home/qi/parser.hpp>
- #include <boost/spirit/home/support/container.hpp>
- #include <boost/spirit/home/qi/detail/attributes.hpp>
- #include <boost/spirit/home/qi/detail/fail_function.hpp>
- #include <boost/spirit/home/qi/detail/pass_container.hpp>
- #include <boost/spirit/home/support/has_semantic_action.hpp>
- #include <boost/spirit/home/support/handles_container.hpp>
- #include <boost/spirit/home/support/info.hpp>
- #include <vector>
- namespace boost { namespace spirit
- {
- ///////////////////////////////////////////////////////////////////////////
- // Enablers
- ///////////////////////////////////////////////////////////////////////////
- template <>
- struct use_operator<qi::domain, proto::tag::modulus> // enables p % d
- : mpl::true_ {};
- }}
- namespace boost { namespace spirit { namespace qi
- {
- template <typename Left, typename Right>
- struct list : binary_parser<list<Left, Right> >
- {
- typedef Left left_type;
- typedef Right right_type;
- template <typename Context, typename Iterator>
- struct attribute
- {
- // Build a std::vector from the LHS's attribute. Note
- // that build_std_vector may return unused_type if the
- // subject's attribute is an unused_type.
- typedef typename
- traits::build_std_vector<
- typename traits::
- attribute_of<Left, Context, Iterator>::type
- >::type
- type;
- };
- list(Left const& left, Right const& right)
- : left(left), right(right) {}
- template <typename F>
- bool parse_container(F f) const
- {
- // in order to succeed we need to match at least one element
- if (f (left))
- return false;
- typename F::iterator_type save = f.f.first;
- while (right.parse(f.f.first, f.f.last, f.f.context, f.f.skipper, unused)
- && !f (left))
- {
- save = f.f.first;
- }
- f.f.first = save;
- return true;
- }
- template <typename Iterator, typename Context
- , typename Skipper, typename Attribute>
- bool parse(Iterator& first, Iterator const& last
- , Context& context, Skipper const& skipper
- , Attribute& attr) const
- {
- typedef detail::fail_function<Iterator, Context, Skipper>
- fail_function;
- // ensure the attribute is actually a container type
- traits::make_container(attr);
- Iterator iter = first;
- fail_function f(iter, last, context, skipper);
- if (!parse_container(detail::make_pass_container(f, attr)))
- return false;
- first = f.first;
- return true;
- }
- template <typename Context>
- info what(Context& context) const
- {
- return info("list",
- std::make_pair(left.what(context), right.what(context)));
- }
- Left left;
- Right right;
- };
- ///////////////////////////////////////////////////////////////////////////
- // Parser generators: make_xxx function (objects)
- ///////////////////////////////////////////////////////////////////////////
- template <typename Elements, typename Modifiers>
- struct make_composite<proto::tag::modulus, Elements, Modifiers>
- : make_binary_composite<Elements, list>
- {};
- }}}
- namespace boost { namespace spirit { namespace traits
- {
- ///////////////////////////////////////////////////////////////////////////
- template <typename Left, typename Right>
- struct has_semantic_action<qi::list<Left, Right> >
- : binary_has_semantic_action<Left, Right> {};
- ///////////////////////////////////////////////////////////////////////////
- template <typename Left, typename Right, typename Attribute
- , typename Context, typename Iterator>
- struct handles_container<qi::list<Left, Right>, Attribute, Context
- , Iterator>
- : mpl::true_ {};
- }}}
- #endif