Add support for dynamic partial names

Uses the subexpression syntax to allow for dynamic partial lookups. Ex:

```
{{> (helper) }}
```

Fixes #933

1 files changed, 12 insertions, 3 deletions

diff --git a/lib/handlebars/runtime.js b/lib/handlebars/runtime.js
index 2b9f474..4e8c33a 100644
--- a/lib/handlebars/runtime.js
+++ b/lib/handlebars/runtime.js
@@ -39,10 +39,8 @@ export function template(templateSpec, env) {
     if (options.hash) {
       context = Utils.extend({}, context, options.hash);
     }
-    if (!partial) {
-      partial = options.partials[options.name];
-    }
 
+    partial = env.VM.resolvePartial.call(this, partial, context, options);
     var result = env.VM.invokePartial.call(this, partial, context, options);
 
     if (result == null && env.compile) {
@@ -187,6 +185,17 @@ export function program(container, i, fn, data, declaredBlockParams, blockParams
   return prog;
 }
 
+export function resolvePartial(partial, context, options) {
+  if (!partial) {
+    partial = options.partials[options.name];
+  } else if (!partial.call && !options.name) {
+    // This is a dynamic partial that returned a string
+    options.name = partial;
+    partial = options.partials[partial];
+  }
+  return partial;
+}
+
 export function invokePartial(partial, context, options) {
   options.partial = true;