1 files changed, 54 insertions, 0 deletions
diff --git a/boost/convert/spirit.hpp b/boost/convert/spirit.hpp
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+// Copyright (c) 2009-2014 Vladimir Batov.
+// Use, modification and distribution are subject to the Boost Software License,
+// Version 1.0. See http://www.boost.org/LICENSE_1_0.txt.
+
+#ifndef BOOST_CONVERT_SPIRIT_BASED_CONVERTER_HPP
+#define BOOST_CONVERT_SPIRIT_BASED_CONVERTER_HPP
+
+#include <boost/convert/base.hpp>
+#include <boost/convert/detail/forward.hpp>
+#include <boost/spirit/include/qi.hpp>
+#include <boost/spirit/include/karma.hpp>
+
+namespace boost { namespace cnv
+{
+    struct spirit;
+}}
+
+struct boost::cnv::spirit : public boost::cnv::cnvbase<boost::cnv::spirit>
+{
+    typedef boost::cnv::spirit             this_type;
+    typedef boost::cnv::cnvbase<this_type> base_type;
+
+    using base_type::operator();
+
+    template<typename string_type, typename out_type>
+    void
+    str_to(cnv::range<string_type> range, optional<out_type>& result_out) const
+    {
+        typedef typename cnv::range<string_type>::iterator                  iterator;
+        typedef typename boost::spirit::traits::create_parser<out_type>::type parser;
+
+        iterator    beg = range.begin();
+        iterator    end = range.end();
+        out_type result;
+
+        if (boost::spirit::qi::parse(beg, end, parser(), result))
+            if (beg == end) // ensure the whole string has been parsed
+                result_out = result;
+    }
+    template<typename in_type, typename char_type>
+    cnv::range<char*>
+    to_str(in_type value_in, char_type* beg) const
+    {
+        typedef typename boost::spirit::traits::create_generator<in_type>::type generator;
+
+        char_type* end = beg;
+        bool      good = boost::spirit::karma::generate(end, generator(), value_in);
+        
+        return cnv::range<char*>(beg, good ? end : beg);
+    }
+};
+
+#endif // BOOST_CONVERT_SPIRIT_BASED_CONVERTER_HPP
+