0274afa0f7
Rainer Deyke's workaround without the need to do ugly backtracking. References: - http://lists.boost.org/boost-users/2016/03/85960.php - https://github.com/Project-OSRM/osrm-backend/issues/2173#issuecomment-204342785
49 lines
1.2 KiB
C++
49 lines
1.2 KiB
C++
#ifndef NEAREST_PARAMETERS_GRAMMAR_HPP
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#define NEAREST_PARAMETERS_GRAMMAR_HPP
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#include "engine/api/nearest_parameters.hpp"
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//#define BOOST_SPIRIT_DEBUG
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#include "server/api/base_parameters_grammar.hpp"
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#include <boost/spirit/include/qi_action.hpp>
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#include <boost/spirit/include/qi_grammar.hpp>
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#include <boost/spirit/include/qi_lit.hpp>
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#include <boost/spirit/include/qi_optional.hpp>
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#include <boost/spirit/include/qi_uint.hpp>
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namespace osrm
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{
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namespace server
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{
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namespace api
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{
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namespace qi = boost::spirit::qi;
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struct NearestParametersGrammar final : public BaseParametersGrammar
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{
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using Iterator = std::string::iterator;
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NearestParametersGrammar() : BaseParametersGrammar(root_rule, parameters)
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{
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const auto set_number = [this](const unsigned number) {
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parameters.number_of_results = number;
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};
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nearest_rule = (qi::lit("number=") >> qi::uint_)[set_number];
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root_rule = query_rule >> -qi::lit(".") >> -qi::lit("json") >>
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-(qi::lit("?") >> (nearest_rule | base_rule) % '&');
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}
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engine::api::NearestParameters parameters;
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private:
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qi::rule<Iterator> root_rule;
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qi::rule<Iterator> nearest_rule;
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};
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}
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}
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}
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#endif
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