Flex/Bison: Error recovery destructors?

Question

I have the following grammar for a comma-separated list with at least one item:

column_expression_list:
    column_expression {
        $$ = LinkedList_New()         


        

Answer 1

Supposing you destroy a list with all items in it using a function called "LinkedList_Del", use Bison's %destructor directive which is made especially for cleaning up allocated elements that end up not used because of error:

%destructor { LinkedList_Del($$); } column_expression

Good luck!

Reference: http://www.gnu.org/software/bison/manual/bison.html#Destructor-Decl