}
return node;
}
- if (drop_vars && assign_as_unused
- && node instanceof AST_Assign
- && node.operator == "="
- && node.left instanceof AST_SymbolRef) {
- var def = node.left.definition();
- if (!(def.id in in_use_ids) && self.variables.get(def.name) === def) {
- return node.right;
+ if (drop_vars && assign_as_unused) {
+ var n = node;
+ while (n instanceof AST_Assign
+ && n.operator == "="
+ && n.left instanceof AST_SymbolRef) {
+ var def = n.left.definition();
+ if (def.id in in_use_ids
+ || self.variables.get(def.name) !== def) break;
+ n = n.right;
}
+ if (n !== node) return n;
}
if (node instanceof AST_For) {
descend(node, this);