Skip to main content

Stephane Ducasse - Pharo: a vision implemented step by step - 31 May 2023


For our May presentation, Stephane Ducasse will present the vision behind Pharo and how that is been implemented incrementally across multiple releases. In Stef's words:

"The vision of Pharo is based on three pillars:
- First we want to make sure that Pharo is used to develop complex and robust systems (by complex we means multiple millions lines of code or objects).
- Second we want Pharo to be a modular system that can be versatile (Pharo on iot, on large servers, in the web browser….)
- Third Pharo should be an evolvable system that can adapt to new needs (modular tools, first class slot, new debuggers, packages…).

Sometimes it can be unclear that we follow this vision but over the years we are delivering this vision and we will continue. In this talk I will briefly recall the vision behind Pharo and show the achievements so far. I will show that our development is heavily backed by tests.
In the second part of the talk I will focus on the current effort to improve the user interface. I will show that the reimplementation of the Spec UI framework is a cornerstone of the future replacement of Morphic and use of GTK.
I will also answer questions about Pharo 11 and Pharo 12."

Stephane is an Inria Research Director, currently lead the RMoD team. Stef is an expert in language design, software quality, program understanding, program visualisations, reengineering and metamodeling. Among his contributions we can list: traits (implemented in Pharo, Perl, PHP and other languages); Moose, an open-source software analysis platform. Stef is one of the leaders of Pharo, a dynamic reflective object-oriented language supporting live programming, and of the industrial Pharo consortium.

Stef works regularly with companies such as Thales, Wordline, Siemens, Berger-Levrault, Arolla, and others on their software evolution problems. Stef has authored a couple hundred articles and several books.

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.



Popular posts from this blog

A Tour of Architectural Abstraction with Objective-S - Wednesday, November 24th

This month, the UKSTUG will take a look at Objective-S , an architecture-oriented programming language based on Smalltalk and Objective-C, by hosting his creator Marcel Weiher. As per Alan Kay, “Code seems large and complicated for what it does” . Objective-S addresses one source of this accidental complexity: using software architectural abstraction to directly expresses the much wider variety of architectural styles typical of modern software systems, compared to traditional programming languages that still follow the call/return architectural style of scientific programs from the early days of computing. Marcel Weiher started his forays into dynamic object-oriented computing by implementing Objective-C on his Amiga 35 years ago and hasn’t stopped since. Stops on the way have been at Apple, the BBC, Microsoft and various startups, as well as contributing to Squeak. He is currently a principal software engineer at Citymapper and PhD student at HPI, where he is trying to distill some

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 fin

Deploying to the cloud from Pharo - Wednesday, July 29th

The next meeting of the UK Smalltalk User Group will be on Wednesday, July 29th. Peter Svensson will present his work on Cloudsdk-st. Cloudsdk-st is an experiment in ways to work with cloud deployment from a Smalltalk image. Traditionally cloud deployments run 'out of band' in separate build scripts or build/CI/CD systems. This project lets you define Docker images (using Dockerfiles) for Smalltalk, send them to the build system of a cloud provider directly and then choose what kind of service you want your image to be (cloud function or long-running VM). Currently it only supports Google Cloud and has a very rough UI. Future plans include support for AWS and Azure as well as better feedback and a Spec2 UI. 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!