Re: [Boost-users] Spirit Newbie (balanced parentheses)

EricB schrieb:

is there any way to manage this with 1.6.4

If only need to checked whether the string contains the same number of '(' and ')' what about int counter=0; rule<> r = ch_p('(')[increment_a(counter)] >> ~ch_p(')') >> ch_p(')')[decrement_a(counter)] if(counter!=0) { // unbalanced! } L.R.