hi, I am writing a parser to support 'parallel assignment i.e. in syntax a,b,c = 1,2,3; and I write the grammar like:
vars : var | var comma vars values : value | value comma values assignment : vars assign values semicolon they are working, but lack of checking if the lhs and rhs of '=' are in the same number of elements, one solution would be I can do this check after 'parsing' but it would not be a very good idea if there are a lot of line of parallel assignment. So I would like to ask if there is any way I could make it checked during parsing ? I mean how I could write the grammer to force the lhs and rhs of '=' are in the same number of elements? Thank you very much! Best wishes, Max _______________________________________________ help-bison@gnu.org http://lists.gnu.org/mailman/listinfo/help-bison
