Skip to main content

LiveTyping - Wednesday, June 30th

 The next meeting of the UK Smalltalk User Group will be on Wednesday, June 30th.

 

Hernan Wilkinson will talk about his LiveTyping project.

Currently, almost all mainstream dynamically typed languages support type annotation a la Strongtalk. Python calls it "type hints", TypeScript is JavaScript+type annotations, PHP calls it "type declarations" and Ruby does it through a tool called Sorbet. All of them annotate the types in the source code and it is the programmer who must write and maintain the annotation. In all cases, it is not mandatory for the system to correctly type check for it to run.
LiveTyping is a type system proposal for Smalltalk, that seeks similar objectives but implemented in a different way. First, it is the environment itself that collects and maintains the types based on the execution of the system, not the programmer. Second, the types are not interleaved in the source code, thus maintaining the syntax and simplicity of the language. And finally, the main objective is not to carry out a static type checking (although it supports it), but to augment the programmers experience increasing the usability of current tools such as searching for senders and implementers, and performing more accurate and safe refactorings.
In this talk Hernan will briefly show how LiveTyping is implemented to later concentrate on the improvements made to the tools and the benefits it brings when developing software with Smalltalk.
LiveTyping is currently implemented in Cuis Smalltalk and has been successfully used for the last two years in three different universities in Argentina when teaching Object Oriented Programming and Design.

Given the current COVID-19 restrictions, this will be an online meeting from home.

If you'd like to join us, please sign up in advance on the meeting's Meetup page to receive the meeting details. Don’t forget to bring your laptop and drinks!

Comments

Peter O said…
LiveTyping is great, as shown in the Meetup session. I believe LiveTyping does not (yet) work in Pharo Smalltalk. It would be great to have LiveTyping in Pharo.

Popular posts from this blog

The next UK Smalltalk User Group meeting is on this coming Monday, 30th January at 6.30pm at it’s usual location  The Counting House . This is the first of the talks that we selected at the Christmas meeting. And for some reason I got chosen to go first: Anatomy of an IDE Using a few example IDEs we are going to look at what makes an IDE valuable. Building software is a complex business, software that works and stays in production for years. It is a craft that involves engineering, insight and skill. The tools that we use to build that software are vital enablers to our success. Between 1997-2004 the dominance of Java and the main vendors’ tools strategies led to something of a stagnation for IDEs. But since then with the return to language diversity and the broadening of platforms there has been a real opportunity to experiment with what an IDE is and means and to look at how it could evolve. We will look at a range of IDEs including WebVelocity, Cloud9 and Codea and cont

Nov 22: Michael Lucas-Smith on Xtreams

In order to welcome Michael Lucas-Smith and Helge Nowak, who will be visiting London this month, we've moved our November monthly meeting one week earlier to Monday, November 22. Michael has offered to give us an in-depth presentation on Xtreams , a streaming framework with a new and refreshingly consistent API. From the project page: Xtreams is a generalized stream/iterator framework providing [a] simple, unified API for reading from different kinds of sources and writing into different kinds of destinations (Collections, Sockets, Files, Pipes, etc). Streams themselves can be sources or destinations as well. This allows to stack streams on top of each other. It is the stacking nature of the streams that give this framework its real power and, from what Michael and Martin (Kobetic) have shown me, you can do some pretty impressive stuff. Martin's presentation at ESUG only scratched the surface, apparently, and Michael intends to delve even deeper. There will also be plenty of ti