Disallow reversal where lhs has higher or equal precedence

Fixes #267
2013-10-29 21:37:36 +01:00
parent b214d3786f
commit 785c6064cc
2 changed files with 16 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1907,7 +1907,11 @@ merge(Compressor.prototype, {
                // if right is a constant, whatever side effects the
                // left side might have could not influence the
                // result.  hence, force switch.
-                reverse(null, true);
+
+                if (!(self.left instanceof AST_Binary
+                    && PRECEDENCE[self.left.operator] >= PRECEDENCE[self.operator])) {
+                    reverse(null, true);
+                }
            }
            if (/^[!=]==?$/.test(self.operator)) {
                if (self.left instanceof AST_SymbolRef && self.right instanceof AST_Conditional) {