Added thirdparty: boost library

thirdparty/include/boost/spirit/home/x3/numeric/real.hpp

@@ -0,0 +1,65 @@
+/*=============================================================================
+    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;
+
+        constexpr real_parser()
+        	: policies() {}
+
+        constexpr real_parser(RealPolicies const& policies)
+        	: policies(policies) {}
+
+        template <typename Iterator, typename Context>
+        bool parse(Iterator& first, Iterator const& last
+          , Context const& 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 const& 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;
+    constexpr float_type float_ = {};
+
+    typedef real_parser<double> double_type;
+    constexpr double_type double_ = {};
+
+    typedef real_parser<long double> long_double_type;
+    constexpr long_double_type long_double = {};
+
+}}}
+
+#endif