153 lines
3.9 KiB
C++
153 lines
3.9 KiB
C++
// ----------------------------------------------------------------------------
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// Copyright (C) 2002-2006 Marcin Kalicinski
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// For more information, see www.boost.org
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// ----------------------------------------------------------------------------
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/* This is grammar of INFO file format written in form of boost::spirit rules.
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For simplicity, it does not parse #include directive. Note that INFO parser
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included in property_tree library does not use Spirit.
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*/
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//#define BOOST_SPIRIT_DEBUG // uncomment to enable debug output
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#include <boost/spirit.hpp>
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struct info_grammar: public boost::spirit::grammar<info_grammar>
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{
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template<class Scanner>
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struct definition
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{
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boost::spirit::rule<typename boost::spirit::lexeme_scanner<Scanner>::type> chr, qchr, escape_seq;
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boost::spirit::rule<Scanner> string, qstring, cstring, key, value, entry, info;
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definition(const info_grammar &self)
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{
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using namespace boost::spirit;
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escape_seq = chset_p("0abfnrtv\"\'\\");
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chr = (anychar_p - space_p - '\\' - '{' - '}' - '#' - '"') | ('\\' >> escape_seq);
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qchr = (anychar_p - '"' - '\n' - '\\') | ('\\' >> escape_seq);
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string = lexeme_d[+chr];
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qstring = lexeme_d['"' >> *qchr >> '"'];
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cstring = lexeme_d['"' >> *qchr >> '"' >> '\\'];
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key = string | qstring;
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value = string | qstring | (+cstring >> qstring) | eps_p;
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entry = key >> value >> !('{' >> *entry >> '}');
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info = *entry >> end_p;
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// Debug nodes
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BOOST_SPIRIT_DEBUG_NODE(escape_seq);
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BOOST_SPIRIT_DEBUG_NODE(chr);
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BOOST_SPIRIT_DEBUG_NODE(qchr);
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BOOST_SPIRIT_DEBUG_NODE(string);
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BOOST_SPIRIT_DEBUG_NODE(qstring);
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BOOST_SPIRIT_DEBUG_NODE(key);
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BOOST_SPIRIT_DEBUG_NODE(value);
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BOOST_SPIRIT_DEBUG_NODE(entry);
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BOOST_SPIRIT_DEBUG_NODE(info);
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}
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const boost::spirit::rule<Scanner> &start() const
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{
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return info;
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}
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};
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};
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void info_parse(const char *s)
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{
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using namespace boost::spirit;
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// Parse and display result
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info_grammar g;
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parse_info<const char *> pi = parse(s, g, space_p | comment_p(";"));
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std::cout << "Parse result: " << (pi.hit ? "Success" : "Failure") << "\n";
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}
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int main()
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{
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// Sample data 1
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const char *data1 =
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"\n"
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"key1 data1\n"
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"{\n"
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"\tkey data\n"
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"}\n"
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"key2 \"data2 \" {\n"
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"\tkey data\n"
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"}\n"
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"key3 \"data\"\n"
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"\t \"3\" {\n"
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"\tkey data\n"
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"}\n"
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"\n"
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"\"key4\" data4\n"
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"{\n"
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"\tkey data\n"
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"}\n"
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"\"key.5\" \"data.5\" { \n"
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"\tkey data \n"
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"}\n"
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"\"key6\" \"data\"\n"
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"\t \"6\" {\n"
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"\tkey data\n"
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"}\n"
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" \n"
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"key1 data1\n"
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"{\n"
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"\tkey data\n"
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"}\n"
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"key2 \"data2 \" {\n"
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"\tkey data\n"
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"}\n"
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"key3 \"data\"\n"
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"\t \"3\" {\n"
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"\tkey data\n"
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"}\n"
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"\n"
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"\"key4\" data4\n"
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"{\n"
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"\tkey data\n"
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"}\n"
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"\"key.5\" \"data.5\" {\n"
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"\tkey data\n"
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"}\n"
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"\"key6\" \"data\"\n"
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"\t \"6\" {\n"
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"\tkey data\n"
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"}\n"
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"\\\\key\\t7 data7\\n\\\"data7\\\"\n"
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"{\n"
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"\tkey data\n"
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"}\n"
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"\"\\\\key\\t8\" \"data8\\n\\\"data8\\\"\"\n"
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"{\n"
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"\tkey data\n"
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"}\n"
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"\n";
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// Sample data 2
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const char *data2 =
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"key1\n"
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"key2\n"
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"key3\n"
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"key4\n";
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// Parse sample data
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info_parse(data1);
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info_parse(data2);
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}
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