Adding support for rendering empty subexpressions

Fixes #1
2014-12-30 17:06:29 -05:00
parent d7d1a78656
commit cb359bf4dd
2 changed files with 15 additions and 2 deletions
@@ -23,7 +23,8 @@ export default {

  _render() {
    var start, end,
-        partPromises;
+        partPromises,
+        items;

    if (this.anchorStart) {
      start = this.renderLabel('Start of line')
@@ -39,7 +40,13 @@ export default {
      return part.render(this.container.group());
    });

-    return Q.all(_([start, partPromises, end]).flatten().compact().value())
+    items = _([start, partPromises, end]).flatten().compact().value();
+
+    if (items.length === 0) {
+      items = [this.container.group()];
+    }
+
+    return Q.all(items)
      .then(items => {
        this.start = _.first(items);
        this.end = _.last(items);