fix class extends expression (#1956)

2017-05-16 15:29:25 -04:00
parent c22d26b483
commit ebb469e4cd
2 changed files with 24 additions and 2 deletions
--- a/lib/output.js
+++ b/lib/output.js
@@ -1474,10 +1474,20 @@ function OutputStream(options) {
            output.space();
        }
        if (self.extends) {
+            var parens = self.extends instanceof AST_Binary ||
+                self.extends instanceof AST_Conditional;
            output.print("extends");
-            output.space();
+            if (parens) {
+                output.print("(");
+            } else {
+                output.space();
+            }
            self.extends.print(output);
-            output.space();
+            if (parens) {
+                output.print(")");
+            } else {
+                output.space();
+            }
        }
        if (self.properties.length > 0) output.with_block(function(){
            self.properties.forEach(function(prop, i){