xp-framework/xp-language — pull request #13 by thekid (2012-04-22 13:44:06+00:00)
Title: Navigation operator

This pull request implements the **navigation operator** (aka "null-safe object operator", `?.`) from xp-framework/rfc#212:

```groovy
$instance= null;
$instance?.member; // null
$instance?.toString(); // null
```