A Look at dyn* Code Generation
As I've written about before, an important goal for async Rust is to support async functions everywhere, including in trait objects (dyn Trait). To this end, we are adding a new experimental type called dyn* that will give us more flexibility to support dynamic dispatch for async methods. We now have experimental support for dyn* in nightly Rust now, so we can start to kick the tires and use our e
How Async Functions in Traits could Work in Rustc
One of the major goals for the Rust Async Working Group is to allow async fn everywhere fn is allowed, especially in traits. In this post, I'd like to distill some of the proposed designs and show how async functions in traits could be implemented. We'll look at one possible way this could work, although I'd like to emphasize that this is not the only way, and many details of the design that we'll
Booting to Rust
A couple nights ago I was looking over the UEFI spec, and I realized it shouldn't be too hard to write UEFI applications in Rust. It turns out, you can, and here I will tell you how. The thing that surprises me most about UEFI is that it now appears possible to boot your machine without ever writing a single line of assembly language. Booting used to require this tedious process of starting out in
Why Write Compilers in Scheme?
One of the questions Klint Finley asked me for the Wired article about Harlan was "Why Scheme?" I wasn't really satisfied with my answer, so I thought I'd answer it more completely here. Besides the fact that we were already experienced writing compilers in Scheme, Scheme has a lot of features that are very useful to compiler writers. We were already familiar with Scheme🔗 Indiana University has f
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How to write a simple Scheme debugger
