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Diffstat (limited to 'boost/spirit/home/x3/numeric/real.hpp')
-rw-r--r-- | boost/spirit/home/x3/numeric/real.hpp | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/boost/spirit/home/x3/numeric/real.hpp b/boost/spirit/home/x3/numeric/real.hpp new file mode 100644 index 0000000000..91da536421 --- /dev/null +++ b/boost/spirit/home/x3/numeric/real.hpp @@ -0,0 +1,62 @@ +/*============================================================================= + Copyright (c) 2001-2014 Joel de Guzman + + Distributed under the Boost Software License, Version 1.0. (See accompanying + file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) +==============================================================================*/ +#if !defined(BOOST_SPIRIT_X3_REAL_APRIL_18_2006_0850AM) +#define BOOST_SPIRIT_X3_REAL_APRIL_18_2006_0850AM + +#include <boost/spirit/home/x3/core/parser.hpp> +#include <boost/spirit/home/x3/core/skip_over.hpp> +#include <boost/spirit/home/x3/numeric/real_policies.hpp> +#include <boost/spirit/home/x3/support/numeric_utils/extract_real.hpp> + +namespace boost { namespace spirit { namespace x3 +{ + template <typename T, typename RealPolicies = real_policies<T> > + struct real_parser : parser<real_parser<T, RealPolicies> > + { + typedef T attribute_type; + static bool const has_attribute = true; + + real_parser() + : policies() {} + + real_parser(RealPolicies const& policies) + : policies(policies) {} + + template <typename Iterator, typename Context> + bool parse(Iterator& first, Iterator const& last + , Context& context, unused_type, T& attr_) const + { + x3::skip_over(first, last, context); + return extract_real<T, RealPolicies>::parse(first, last, attr_, policies); + } + + template <typename Iterator, typename Context, typename Attribute> + bool parse(Iterator& first, Iterator const& last + , Context& context, unused_type, Attribute& attr_param) const + { + // this case is called when Attribute is not T + T attr_; + if (parse(first, last, context, unused, attr_)) + { + traits::move_to(attr_, attr_param); + return true; + } + return false; + } + + RealPolicies policies; + }; + + typedef real_parser<float> float_type; + float_type const float_ = {}; + + typedef real_parser<double> double_type; + double_type const double_ = {}; + +}}} + +#endif |