| /*============================================================================= |
| Copyright (c) 2011 Jamboree |
| Copyright (c) 2014 Lee Clagett |
| |
| 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_SEEK_APRIL_13_2014_1920PM) |
| #define BOOST_SPIRIT_X3_SEEK_APRIL_13_2014_1920PM |
| |
| #if defined(_MSC_VER) |
| #pragma once |
| #endif |
| |
| #include <boost/spirit/home/x3/core/parser.hpp> |
| |
| namespace boost { namespace spirit { namespace x3 |
| { |
| template<typename Subject> |
| struct seek_directive : unary_parser<Subject, seek_directive<Subject>> |
| { |
| typedef unary_parser<Subject, seek_directive<Subject>> base_type; |
| static bool const is_pass_through_unary = true; |
| static bool const handles_container = Subject::handles_container; |
| |
| seek_directive(Subject const& subject) : |
| base_type(subject) {} |
| |
| template<typename Iterator, typename Context |
| , typename RContext, typename Attribute> |
| bool parse( |
| Iterator& first, Iterator const& last |
| , Context const& context, RContext& rcontext, Attribute& attr) const |
| { |
| Iterator current(first); |
| for (/**/; current != last; ++current) |
| { |
| if (this->subject.parse(current, last, context, rcontext, attr)) |
| { |
| first = current; |
| return true; |
| } |
| } |
| |
| // Test for when subjects match on input empty. Example: |
| // comment = "//" >> seek[eol | eoi] |
| if (this->subject.parse(current, last, context, rcontext, attr)) |
| { |
| first = current; |
| return true; |
| } |
| |
| return false; |
| } |
| }; |
| |
| struct seek_gen |
| { |
| template<typename Subject> |
| seek_directive<typename extension::as_parser<Subject>::value_type> |
| operator[](Subject const& subject) const |
| { |
| return {as_parser(subject)}; |
| } |
| }; |
| |
| seek_gen const seek = seek_gen(); |
| }}} |
| |
| #endif |