67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
// Copyright (c) 2001-2010 Hartmut Kaiser
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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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// The purpose of this example is to show how any character sequence can be
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// printed while being properly quoted.
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#include <boost/config/warning_disable.hpp>
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#include <boost/spirit/include/karma.hpp>
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namespace client
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{
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namespace karma = boost::spirit::karma;
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template <typename OutputIterator>
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struct escaped_string
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: karma::grammar<OutputIterator, std::string(char const*)>
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{
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escaped_string()
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: escaped_string::base_type(esc_str)
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{
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esc_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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esc_str = karma::lit(karma::_r1)
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<< *(esc_char | karma::print | "\\x" << karma::hex)
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<< karma::lit(karma::_r1)
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;
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}
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karma::rule<OutputIterator, std::string(char const*)> esc_str;
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karma::symbols<char, char const*> esc_char;
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};
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}
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///////////////////////////////////////////////////////////////////////////////
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int main()
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{
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namespace karma = boost::spirit::karma;
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typedef std::back_insert_iterator<std::string> sink_type;
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std::string generated;
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sink_type sink(generated);
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std::string str("string to escape: \n\r\t\"'\x19");
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char const* quote = "'''";
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client::escaped_string<sink_type> g;
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if (!karma::generate(sink, g(quote), str))
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{
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std::cout << "-------------------------\n";
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std::cout << "Generating 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 << "Generated: " << generated << "\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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