boost::spirit - why won't this palindrome code work?

23 Jun 2003


      Hi.
I just started playing with spirit and tried the following code to 
match palindromes of strings consisting of a's and b's. Why won't 
this work? (It prints 0, not 1)

#include "boost/spirit/core.hpp"
#include <iostream.h>

using namespace boost::spirit;

int main(int argc, char* argv[])
{
	rule <> S;
	S =		ch_p('a')
		|	ch_p('b')
		|	epsilon_p
		|	('a' >> S >> 'a')
		|	('b' >> S >> 'b');

		
	char * str = "aabaa";	
	cout << parse(str, S).full;


	return 0;
}

boost::spirit - why won't this palindrome code work?

joshwaxman