/*=============================================================================
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Copyright (c) 2001-2014 Joel de Guzman
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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==============================================================================*/
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#if !defined(BOOST_SPIRIT_X3_REAL_APRIL_18_2006_0850AM)
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#define BOOST_SPIRIT_X3_REAL_APRIL_18_2006_0850AM
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#include <boost/spirit/home/x3/core/parser.hpp>
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#include <boost/spirit/home/x3/core/skip_over.hpp>
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#include <boost/spirit/home/x3/numeric/real_policies.hpp>
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#include <boost/spirit/home/x3/support/numeric_utils/extract_real.hpp>
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namespace boost { namespace spirit { namespace x3
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{
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template <typename T, typename RealPolicies = real_policies<T> >
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struct real_parser : parser<real_parser<T, RealPolicies> >
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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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constexpr real_parser()
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: policies() {}
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constexpr real_parser(RealPolicies const& policies)
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: policies(policies) {}
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template <typename Iterator, typename Context>
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bool parse(Iterator& first, Iterator const& last
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, Context const& context, unused_type, T& attr_) const
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{
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x3::skip_over(first, last, context);
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return extract_real<T, RealPolicies>::parse(first, last, attr_, policies);
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}
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template <typename Iterator, typename Context, typename Attribute>
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bool parse(Iterator& first, Iterator const& last
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, Context const& context, unused_type, Attribute& attr_param) const
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{
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// this case is called when Attribute is not T
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T attr_;
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if (parse(first, last, context, unused, attr_))
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{
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traits::move_to(attr_, attr_param);
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return true;
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}
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return false;
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}
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RealPolicies policies;
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};
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typedef real_parser<float> float_type;
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constexpr float_type float_ = {};
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typedef real_parser<double> double_type;
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constexpr double_type double_ = {};
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typedef real_parser<long double> long_double_type;
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constexpr long_double_type long_double = {};
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}}}
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#endif
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