mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-04 17:33:55 +03:00
55 lines
1.8 KiB
C++
55 lines
1.8 KiB
C++
// Copyright (c) 2009-2016 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_type*>
|
|
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_type*>(beg, good ? end : beg);
|
|
}
|
|
};
|
|
|
|
#endif // BOOST_CONVERT_SPIRIT_BASED_CONVERTER_HPP
|
|
|