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

18 Nov 2008


      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 
#include 
#include 
#include 
#include 
#include 
#include 
#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
{
    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 key;
    rule quoted_string;
    rule value;
rule 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