73 lines
2.0 KiB
C++
73 lines
2.0 KiB
C++
// Copyright (c) 2010 Jeroen Habraken
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//
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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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#include <boost/spirit/include/qi.hpp>
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#include <iostream>
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#include <ostream>
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#include <string>
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namespace client
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{
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namespace qi = boost::spirit::qi;
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template <typename InputIterator>
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struct unescaped_string
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: qi::grammar<InputIterator, std::string(char const*)>
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{
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unescaped_string()
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: unescaped_string::base_type(unesc_str)
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{
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unesc_char.add("\\a", '\a')("\\b", '\b')("\\f", '\f')("\\n", '\n')
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("\\r", '\r')("\\t", '\t')("\\v", '\v')("\\\\", '\\')
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("\\\'", '\'')("\\\"", '\"')
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;
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unesc_str = qi::lit(qi::_r1)
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>> *(unesc_char | qi::alnum | "\\x" >> qi::hex)
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>> qi::lit(qi::_r1)
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;
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}
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qi::rule<InputIterator, std::string(char const*)> unesc_str;
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qi::symbols<char const, char const> unesc_char;
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};
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}
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///////////////////////////////////////////////////////////////////////////////
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// Main program
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///////////////////////////////////////////////////////////////////////////////
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int main()
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{
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namespace qi = boost::spirit::qi;
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typedef std::string::const_iterator iterator_type;
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std::string parsed;
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std::string str("'''string\\x20to\\x20unescape\\x3a\\x20\\n\\r\\t\\\"\\'\\x41'''");
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char const* quote = "'''";
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iterator_type iter = str.begin();
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iterator_type end = str.end();
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client::unescaped_string<iterator_type> p;
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if (!qi::parse(iter, end, p(quote), parsed))
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{
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std::cout << "-------------------------\n";
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std::cout << "Parsing failed\n";
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std::cout << "-------------------------\n";
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}
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else
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{
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std::cout << "-------------------------\n";
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std::cout << "Parsed: " << parsed << "\n";
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std::cout << "-------------------------\n";
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}
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return 0;
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}
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