Re: [Boost-users] [spirit2] Trivial parser crashes

Subject: Re: [Boost-users] [spirit2] Trivial parser crashes
From: Joel de Guzman (joel_at_[hidden])
Date: 2008-11-17 19:08:42

sm4 wrote:
> Oops - seems formatting got in the way.
> 
> Hope this is better:

Ooops, I missed your reply. Its better to post spirit
related questions to spirit's mailing list. I'm re-posting
this there.

> -----------------------------------------------------------------------------------------
> #include <boost/config/warning_disable.hpp>
> #include <boost/spirit/include/qi.hpp>
> #include <boost/spirit/include/phoenix_core.hpp>
> #include <boost/spirit/include/phoenix_operator.hpp>
> #include <boost/spirit/include/phoenix_fusion.hpp>
> #include <boost/fusion/include/adapt_struct.hpp>
> #include <boost/fusion/include/adapt_struct.hpp>
> 
> #include <iostream>
> #include <string>
> 
> using namespace boost::spirit;
> using namespace boost::spirit::qi;
> using namespace boost::spirit::ascii;
> using namespace boost::spirit::arg_names;
> 
> namespace phoenix = boost::phoenix;
> 
> using phoenix::at_c;
> 
> struct key_val
> {
>     std::string key;
>     std::string value;
> };
> 
> BOOST_FUSION_ADAPT_STRUCT(
>     key_val,
>     (std::string, key)
>     (std::string, value)
> )
> 
> 
> template <typename Iterator>
> struct my_grammar : grammar<Iterator, key_val(), space_type>
> {
>     my_grammar() : my_grammar::base_type(start)
>     {
>         quoted_string %= lexeme['"' >> +(char_ - '"') >> '"'];
>         key %= quoted_string;
>         value %= quoted_string;
> 
>         start =
>                 key           [at_c<0>(_val) = _1]
>              >> ':'
>              >> value         [at_c<1>(_val) = _1]
>              ;
>     }
> 
>     rule<Iterator, std::string(), space_type> key;
>     rule<Iterator, std::string(), space_type> quoted_string;
>     rule<Iterator, std::string(), space_type> value;
> 
>     rule<Iterator, key_val(), space_type> start;
> 
> };
> 
> int main()
> {
>     typedef std::string::const_iterator citerator;
>     std::string str = "\"x\": \"25\" ";
> 
>     citerator iter = str.begin();
>     citerator end = str.end();
> 
>     my_grammar<citerator> my_parser;
>     key_val kv;
>     phrase_parse(iter, end, my_parser, kv, space); // ASSERTs
> 
>     return 0;
> } 
> 
> -----------------------------------------------------------------------------------------

-- 
Joel de Guzman
http://www.boostpro.com
http://spirit.sf.net