---
draft: false
authors:
  - mwahl
description: "Last week's Pony news, reported this week."
categories:
  - "Last Week in Pony"
title: "Last Week in Pony - May 20, 2018"
date: 2018-05-20T22:00:00+02:00
---
_Last Week In Pony_ is a weekly blog post to catch you up on the latest news for the Pony programming language. To learn more about Pony check out [our website](https://ponylang.io), our Twitter account [@ponylang](https://twitter.com/ponylang), or our [Zulip community](https://ponylang.zulipchat.com).

Got something you think should be featured? There's a GitHub issue for that! Add a comment to the [open "Last Week in Pony" issue](https://github.com/ponylang/ponylang.github.io/issues?q=is%3Aissue+is%3Aopen+label%3Alast-week-in-pony).
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## Items of Note

* GitHub User [d-led](https://github.com/d-led) provided an example for [Vaughn Vernons Domain Driven Design with Actors](https://github.com/VaughnVernon/DDDwithActors) in [Pony](https://github.com/d-led/DDDwithActorsPony). This is a quite good comparison between the different actor system languages and libraries out there.
* A new version of [ponycheck](https://github.com/mfelsche/ponycheck), the property-based testing library for Pony, has been released. Version [0.4.0](https://github.com/mfelsche/ponycheck/releases/tag/0.4.0) brings partial Generators and some simplification of the Generator API, for more details, see the [Release Notes](https://github.com/mfelsche/ponycheck/releases/tag/0.4.0).

## RFCs

### Under Discussion

* [Formal Viewpoint Adaptation](https://github.com/ponylang/rfcs/pull/122)

* [Use Site Variance and Implicit Interfaces for Generic Types.](https://github.com/ponylang/rfcs/pull/123)

* [Trust boundary specification](https://github.com/ponylang/rfcs/pull/124)

Interested in making a change, or keeping up with changes to Pony? Check out the [RFC repo](https://github.com/ponylang/rfcs). Contributors welcome!
