fix files only containg comments not being output - fixes #259

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 1.14.18
+
+ * Fix files only containg comments not being output.
+
 # 1.14.17
 
  * Add default initializer to let variables within loop bodies.

lib/6to5/generation/generator.js

@@ -71,6 +71,12 @@ CodeGenerator.prototype.generate = function () {
 
   this.print(ast);
 
+  var comments = [];
+  _.each(ast.comments, function (comment) {
+    if (!comment._displayed) comments.push(comment);
+  });
+  if (comments.length) this._printComments(comments);
+
   return {
     map:  this.map.get(),
     code: this.buffer.get()
@@ -259,6 +265,8 @@ CodeGenerator.prototype._printComments = function (comments) {
   var self = this;
 
   _.each(comments, function (comment) {
+    comment._displayed = true;
+
     // whitespace before
     self.newline(self.whitespace.getNewlinesBefore(comment));
 

test/fixtures/generation/comments/comment-only/expected.js

@@ -1,6 +1,6 @@
+"use strict";
+
 // from #23
 /**/
 /*
 */
-
-test