Chris@102: /*=============================================================================
Chris@102:     Copyright (c) 2011 Jamboree
Chris@102:     Copyright (c) 2014 Lee Clagett
Chris@102: 
Chris@102:     Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@102:     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@102: ==============================================================================*/
Chris@102: #if !defined(BOOST_SPIRIT_X3_SEEK_APRIL_13_2014_1920PM)
Chris@102: #define BOOST_SPIRIT_X3_SEEK_APRIL_13_2014_1920PM
Chris@102: 
Chris@102: #if defined(_MSC_VER)
Chris@102: #pragma once
Chris@102: #endif
Chris@102: 
Chris@102: #include <boost/spirit/home/x3/core/parser.hpp>
Chris@102: 
Chris@102: namespace boost { namespace spirit { namespace x3
Chris@102: {
Chris@102:     template<typename Subject>
Chris@102:     struct seek_directive : unary_parser<Subject, seek_directive<Subject>>
Chris@102:     {
Chris@102:         typedef unary_parser<Subject, seek_directive<Subject>> base_type;
Chris@102:         static bool const is_pass_through_unary = true;
Chris@102:         static bool const handles_container = Subject::handles_container;
Chris@102: 
Chris@102:         seek_directive(Subject const& subject) :
Chris@102:             base_type(subject) {}
Chris@102: 
Chris@102:         template<typename Iterator, typename Context
Chris@102:           , typename RContext, typename Attribute>
Chris@102:         bool parse(
Chris@102:             Iterator& first, Iterator const& last
Chris@102:           , Context const& context, RContext& rcontext, Attribute& attr) const
Chris@102:         {
Chris@102:             Iterator current(first);
Chris@102:             for (/**/; current != last; ++current)
Chris@102:             {
Chris@102:                 if (this->subject.parse(current, last, context, rcontext, attr))
Chris@102:                 {
Chris@102:                     first = current;
Chris@102:                     return true;
Chris@102:                 }
Chris@102:             }
Chris@102: 
Chris@102:             // Test for when subjects match on input empty. Example:
Chris@102:             //     comment = "//" >> seek[eol | eoi]
Chris@102:             if (this->subject.parse(current, last, context, rcontext, attr))
Chris@102:             {
Chris@102:                 first = current;
Chris@102:                 return true;
Chris@102:             }
Chris@102: 
Chris@102:             return false;
Chris@102:         }
Chris@102:     };
Chris@102: 
Chris@102:     struct seek_gen
Chris@102:     {
Chris@102:         template<typename Subject>
Chris@102:         seek_directive<typename extension::as_parser<Subject>::value_type>
Chris@102:         operator[](Subject const& subject) const
Chris@102:         {
Chris@102:             return {as_parser(subject)};
Chris@102:         }
Chris@102:     };
Chris@102: 
Chris@102:     seek_gen const seek = seek_gen();
Chris@102: }}}
Chris@102: 
Chris@102: #endif