I wrote: > [...] Why should > be difficult to track the indices in yytext of the beginning and the end > of each matching subexpression, in two arrays of integers (one for > the beginning and one for the end)? [...]
More exactly: in the first array the index of the first element of the matching subexpression, in the second the index of the last element plus one. When both indices are equal, then the subexpression is void. If the second index correspond to something irrelevant in yytext, then one can set yytext there to 0 for easily obtaining a pointer to a null terminating string equal to the subexpression. Just dreaming. Rodrigo.
