]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
1 | /*============================================================================= |
2 | Copyright (c) 2001-2014 Joel de Guzman | |
3 | ||
4 | Distributed under the Boost Software License, Version 1.0. (See accompanying | |
5 | file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | =============================================================================*/ | |
7 | #if !defined(SPIRIT_ALTERNATIVE_JAN_07_2013_1131AM) | |
8 | #define SPIRIT_ALTERNATIVE_JAN_07_2013_1131AM | |
9 | ||
10 | #include <boost/spirit/home/x3/support/traits/attribute_of.hpp> | |
11 | #include <boost/spirit/home/x3/core/parser.hpp> | |
12 | #include <boost/spirit/home/x3/operator/detail/alternative.hpp> | |
13 | ||
14 | namespace boost { namespace spirit { namespace x3 | |
15 | { | |
16 | template <typename Left, typename Right> | |
17 | struct alternative : binary_parser<Left, Right, alternative<Left, Right>> | |
18 | { | |
19 | typedef binary_parser<Left, Right, alternative<Left, Right>> base_type; | |
20 | ||
21 | alternative(Left const& left, Right const& right) | |
22 | : base_type(left, right) {} | |
23 | ||
24 | template <typename Iterator, typename Context, typename RContext> | |
25 | bool parse( | |
26 | Iterator& first, Iterator const& last | |
27 | , Context const& context, RContext& rcontext, unused_type) const | |
28 | { | |
29 | return this->left.parse(first, last, context, rcontext, unused) | |
30 | || this->right.parse(first, last, context, rcontext, unused); | |
31 | } | |
32 | ||
33 | template <typename Iterator, typename Context | |
34 | , typename RContext, typename Attribute> | |
35 | bool parse( | |
36 | Iterator& first, Iterator const& last | |
37 | , Context const& context, RContext& rcontext, Attribute& attr) const | |
38 | { | |
39 | return detail::parse_alternative(this->left, first, last, context, rcontext, attr) | |
40 | || detail::parse_alternative(this->right, first, last, context, rcontext, attr); | |
41 | } | |
42 | }; | |
43 | ||
44 | template <typename Left, typename Right> | |
45 | inline alternative< | |
46 | typename extension::as_parser<Left>::value_type | |
47 | , typename extension::as_parser<Right>::value_type> | |
48 | operator|(Left const& left, Right const& right) | |
49 | { | |
50 | return { as_parser(left), as_parser(right) }; | |
51 | } | |
52 | }}} | |
53 | ||
54 | namespace boost { namespace spirit { namespace x3 { namespace traits | |
55 | { | |
56 | template <typename Left, typename Right, typename Context> | |
57 | struct attribute_of<x3::alternative<Left, Right>, Context> | |
58 | : x3::detail::attribute_of_alternative<Left, Right, Context> {}; | |
59 | }}}} | |
60 | ||
61 | #endif |