EmbeddingGemma 2: an open, lightweight multimodal embedding model
deepmind.google·6d ago
AI Engineering
Lobsters·Aug 3·5 min read
Modelling Actors with Redex: Part I
TL;DR
A model of a simple ISWIM-style functional programming language was built using PLT Redex, focusing on operational semantics and evaluation contexts. This foundational work sets the stage for extending the model into an Erlang-style actor system in future articles.
✦ Why It Matters
Explore and test the ISWIM model in PLT Redex to enhance your understanding of operational semantics.
Key Takeaways
- Implement a simple ISWIM model using PLT Redex.
- Utilize evaluation contexts to control function argument evaluation order.
- Leverage automatic substitution functions for binding structures.
- Prepare for future extensions into an Erlang-style actor system.
How It Works
The model uses evaluation contexts, which are terms with holes indicating where reductions can occur. This approach ensures that function arguments are evaluated in a left-to-right order, and it integrates reduction rules that define how expressions are simplified.
By specifying the binding structure directly in the syntax, Redex can automatically generate necessary substitution functions, streamlining the modeling process.