plural_eval
extern unsigned int plural_eval(plural_expr_t, unsigned int);
pindex = plural_eval(gmnp->plural, mp->n);
e1 = plural_eval(exp->nodes[0], n);
e1 = plural_eval(exp->nodes[0], n);
return (e1 || plural_eval(exp->nodes[1], n));
return (e1 && plural_eval(exp->nodes[1], n));
e2 = plural_eval(exp->nodes[1], n);
e1 = plural_eval(exp->nodes[0], n);
return (plural_eval(exp->nodes[1], n));
return (plural_eval(exp->nodes[2], n));