61 lines
1.7 KiB
C++
61 lines
1.7 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 demonstrate different use cases for the
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// distinct parser.
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#include <iostream>
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#include <string>
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#include <vector>
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//[qi_distinct_includes
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#include <boost/spirit/include/qi.hpp>
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#include <boost/spirit/repository/include/qi_distinct.hpp>
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//]
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//[qi_distinct_namespace
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using namespace boost::spirit;
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using namespace boost::spirit::ascii;
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using boost::spirit::repository::distinct;
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//]
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int main()
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{
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//[qi_distinct_description_ident
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{
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std::string str("description ident");
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std::string::iterator first(str.begin());
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bool r = qi::phrase_parse(first, str.end()
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, distinct(alnum | '_')["description"] >> -lit("--") >> +(alnum | '_')
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, space);
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BOOST_ASSERT(r && first == str.end());
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}
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//]
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//[qi_distinct_description__ident
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{
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std::string str("description--ident");
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std::string::iterator first(str.begin());
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bool r = qi::phrase_parse(first, str.end()
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, distinct(alnum | '_')["description"] >> -lit("--") >> +(alnum | '_')
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, space);
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BOOST_ASSERT(r && first == str.end());
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}
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//]
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//[qi_distinct_description_ident_error
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{
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std::string str("description-ident");
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std::string::iterator first(str.begin());
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bool r = qi::phrase_parse(first, str.end()
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, distinct(alnum | '_')["description"] >> -lit("--") >> +(alnum | '_')
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, space);
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BOOST_ASSERT(!r && first == str.begin());
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}
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//]
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return 0;
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}
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