enhance source mapping on IIFEs (#2224)

fixes #2213
2017-07-11 02:34:28 +08:00
parent 4956ad311b
commit 10a938cb79
2 changed files with 5 additions and 2 deletions
--- a/lib/output.js
+++ b/lib/output.js
@@ -1104,6 +1104,9 @@ function OutputStream(options) {
        self.expression.print(output);
        if (self instanceof AST_New && !need_constructor_parens(self, output))
            return;
+        if (self.expression instanceof AST_Lambda) {
+            output.add_mapping(self.start);
+        }
        output.with_parens(function(){
            self.args.forEach(function(expr, i){
                if (i) output.comma();