1 /*=============================================================================
2     Copyright (c) 2001-2014 Joel de Guzman
3     Copyright (c) 2001-2011 Hartmut Kaiser
4 
5     Distributed under the Boost Software License, Version 1.0. (See accompanying
6     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7 =============================================================================*/
8 #if !defined(BOOST_SPIRIT_X3_LIST_MARCH_24_2007_1031AM)
9 #define BOOST_SPIRIT_X3_LIST_MARCH_24_2007_1031AM
10 
11 #include <boost/spirit/home/x3/core/parser.hpp>
12 #include <boost/spirit/home/x3/support/traits/container_traits.hpp>
13 #include <boost/spirit/home/x3/support/traits/attribute_of.hpp>
14 #include <boost/spirit/home/x3/core/detail/parse_into_container.hpp>
15 
16 namespace boost { namespace spirit { namespace x3
17 {
18     template <typename Left, typename Right>
19     struct list : binary_parser<Left, Right, list<Left, Right>>
20     {
21         typedef binary_parser<Left, Right, list<Left, Right>> base_type;
22         static bool const handles_container = true;
23         static bool const has_attribute = true;
24 
listboost::spirit::x3::list25         constexpr list(Left const& left, Right const& right)
26           : base_type(left, right) {}
27 
28         template <typename Iterator, typename Context
29           , typename RContext, typename Attribute>
parseboost::spirit::x3::list30         bool parse(Iterator& first, Iterator const& last
31           , Context const& context, RContext& rcontext, Attribute& attr) const
32         {
33             // in order to succeed we need to match at least one element
34             if (!detail::parse_into_container(
35                 this->left, first, last, context, rcontext, attr))
36                 return false;
37 
38             Iterator iter = first;
39             while (this->right.parse(iter, last, context, rcontext, unused)
40                 && detail::parse_into_container(
41                     this->left, iter, last, context, rcontext, attr))
42             {
43                 first = iter;
44             }
45 
46             return true;
47         }
48     };
49 
50     template <typename Left, typename Right>
51     constexpr list<
52         typename extension::as_parser<Left>::value_type
53       , typename extension::as_parser<Right>::value_type>
operator %(Left const & left,Right const & right)54     operator%(Left const& left, Right const& right)
55     {
56         return { as_parser(left), as_parser(right) };
57     }
58 }}}
59 
60 namespace boost { namespace spirit { namespace x3 { namespace traits
61 {
62     template <typename Left, typename Right, typename Context>
63     struct attribute_of<x3::list<Left, Right>, Context>
64         : traits::build_container<
65             typename attribute_of<Left, Context>::type> {};
66 }}}}
67 
68 #endif
69