remove paranthesis for -(x*y) (#1732)

2017-03-30 16:09:00 +08:00
parent 7bea38a05d
commit 7cb1adf455
2 changed files with 41 additions and 0 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3034,6 +3034,13 @@ merge(Compressor.prototype, {
                })).optimize(compressor);
            }
        }
+        if (e instanceof AST_Binary
+            && (self.operator == "+" || self.operator == "-")
+            && (e.operator == "*" || e.operator == "/" || e.operator == "%")) {
+            self.expression = e.left;
+            e.left = self;
+            return e.optimize(compressor);
+        }
        // avoids infinite recursion of numerals
        if (self.operator != "-"
            || !(self.expression instanceof AST_Number