title: Angular lazy one-time binding for expressions
body: <p>AngularJS has a new feature since the version 1.3.0-beta.10: the <a href="https://github.com/angular/angular.js/commit/cee429f0aaebf32ef1c9aedd8447a48f163dd0a4">"lazy one-time binding"</a>.</p>
  
  <p>Simple expressions can be prefixed with <code>::</code>, telling angular to stop watching after the expression was first evaluated. The common example given is something like:</p>
  
  <pre><code>&lt;div&gt;{{::user.name}}&lt;/div&gt;
  </code></pre>
  
  <p>Is there a similar syntax for expressions like the following ones?</p>
  
  <pre><code>&lt;div ng-if="user.isSomething &amp;&amp; user.isSomethingElse"&gt;&lt;/div&gt;
  &lt;div ng-class="{classNameFoo: user.isSomething}"&gt;&lt;/div&gt;
  </code></pre>