add missing generic_json_grammar_x3
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82
include/mapnik/json/generic_json_grammar_x3.hpp
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82
include/mapnik/json/generic_json_grammar_x3.hpp
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/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2015 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_JSON_GENERIC_JSON_GRAMMAR_X3_HPP
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#define MAPNIK_JSON_GENERIC_JSON_GRAMMAR_X3_HPP
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#include <mapnik/value/types.hpp>
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#include <mapnik/util/variant.hpp>
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#pragma GCC diagnostic push
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#include <mapnik/warning_ignore.hpp>
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#include <boost/spirit/home/x3.hpp>
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#pragma GCC diagnostic pop
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#include <vector>
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namespace mapnik { namespace json {
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namespace x3 = boost::spirit::x3;
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struct json_value;
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using json_array = std::vector<json_value>;
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using json_object_element = std::pair<std::string, json_value>;
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using json_object = std::vector<json_object_element>;
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using json_value_base = mapnik::util::variant<value_null,
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value_bool,
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value_integer,
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value_double,
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std::string,
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json_array,
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json_object>;
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struct json_value : json_value_base
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{
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#if __cpp_inheriting_constructors >= 200802
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using json_value_base::json_value_base;
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#else
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json_value() = default;
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template <typename T>
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json_value(T && val)
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: json_value_base(std::forward<T>(val)) {}
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#endif
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};
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namespace grammar {
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using generic_json_grammar_type = x3::rule<class generic_json_tag, json_value>;
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using generic_json_key_value_type = x3::rule<class json_object_element_tag, json_object_element>;
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BOOST_SPIRIT_DECLARE(generic_json_grammar_type);
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BOOST_SPIRIT_DECLARE(generic_json_key_value_type);
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}
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grammar::generic_json_grammar_type const& generic_json_grammar();
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grammar::generic_json_key_value_type const& generic_json_key_value();
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}}
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#endif // MAPNIK_JSON_GENERIC_JSON_GRAMMAR_X3_HPP
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133
include/mapnik/json/generic_json_grammar_x3_def.hpp
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133
include/mapnik/json/generic_json_grammar_x3_def.hpp
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/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2016 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_JSON_GENERIC_JSON_GRAMMAR_X3_DEF_HPP
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#define MAPNIK_JSON_GENERIC_JSON_GRAMMAR_X3_DEF_HPP
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#include <boost/fusion/include/std_pair.hpp>
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#include <mapnik/json/generic_json_grammar_x3.hpp>
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#include <mapnik/json/unicode_string_grammar_x3_def.hpp>
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namespace mapnik { namespace json { namespace grammar {
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namespace x3 = boost::spirit::x3;
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auto make_null = [] (auto const& ctx)
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{
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_val(ctx) = mapnik::value_null{};
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};
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auto make_true = [] (auto const& ctx)
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{
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_val(ctx) = true;
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};
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auto make_false = [] (auto const& ctx)
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{
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_val(ctx) = false;
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};
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auto assign = [](auto const& ctx)
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{
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_val(ctx) = _attr(ctx);
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};
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auto assign_key = [](auto const& ctx)
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{
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std::get<0>(_val(ctx)) = _attr(ctx);
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};
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auto assign_value = [](auto const& ctx)
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{
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std::get<1>(_val(ctx)) = _attr(ctx);
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};
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using x3::lit;
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using x3::string;
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// exported rules
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// start
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generic_json_grammar_type const value("JSON Value");
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generic_json_key_value_type const key_value("JSON Object element");
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// rules
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x3::rule<class json_object_tag, json_object> object("JSON Object");
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x3::rule<class json_array_tag, json_array> array("JSON Array");
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x3::rule<class json_number_tag, json_value> number("JSON Number");
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auto const json_double = x3::real_parser<value_double, x3::strict_real_policies<value_double>>();
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auto const json_integer = x3::int_parser<value_integer, 10, 1, -1>();
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// import unicode string rule
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namespace { auto const& json_string = mapnik::json::unicode_string_grammar(); }
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// generic json types
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auto const value_def = object | array | json_string | number
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;
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auto const key_value_def = json_string[assign_key] > lit(':') > value[assign_value]
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;
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auto const object_def = lit('{')
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> -(key_value % lit(','))
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> lit('}')
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;
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auto const array_def = lit('[')
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> -(value % lit(','))
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> lit(']')
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;
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auto const number_def = json_double[assign]
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| json_integer[assign]
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| lit("true") [make_true]
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| lit ("false") [make_false]
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| lit("null")[make_null]
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;
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#pragma GCC diagnostic push
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#include <mapnik/warning_ignore.hpp>
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BOOST_SPIRIT_DEFINE(
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value,
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object,
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key_value,
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array,
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number
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);
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#pragma GCC diagnostic pop
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}}}
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namespace mapnik { namespace json {
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grammar::generic_json_grammar_type const& generic_json_grammar()
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{
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return grammar::value;
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}
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grammar::generic_json_key_value_type const& generic_json_key_value()
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{
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return grammar::key_value;
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}
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}}
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#endif // MAPNIK_JSON_GENERIC_JSON_GRAMMAR_X3_DEF_HPP
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