49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
/*=============================================================================
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Copyright (c) 2019 Nikita Kniazev
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Use, modification and distribution is subject to the Boost Software
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License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#if !defined(BOOST_SPIRIT_TEST_X3_UTILS_HPP)
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#define BOOST_SPIRIT_TEST_X3_UTILS_HPP
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#include <boost/spirit/home/x3/core/parser.hpp>
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struct move_only
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{
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move_only() = default;
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move_only(move_only&&) = default;
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move_only& operator=(move_only&&) = default;
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};
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template <typename T>
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struct synth_parser : boost::spirit::x3::parser<synth_parser<T>>
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{
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typedef T attribute_type;
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static bool const has_attribute = true;
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static bool const handles_container = false;
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template <typename Iterator, typename Context,
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typename RuleContext, typename Attribute>
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bool parse(Iterator& iter, Iterator const& last, Context const&,
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RuleContext&, Attribute& attr) const
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{
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if (iter != last && *iter == 's') {
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++iter;
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boost::spirit::x3::traits::move_to(attribute_type{}, attr);
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return true;
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}
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return false;
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}
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};
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template <typename T>
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synth_parser<T> synth{};
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synth_parser<move_only> const synth_move_only{};
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#endif
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