---
layout: stdlib-reference
---

# attribute [Specialize]

> #### Experimental Feature
> The feature described in this page is marked as experimental, and may be subject to change in future releases.
> Users are advised that any code that depend on this feature may not be compilable by future versions of the compiler.

## Description

Mark an interface type for specialization only. Such interface types cannot be used for dynamic dispatch.


## Signature

<pre>
[<a href="specialize-0.html">Specialize</a>]
</pre>