This repository contains witx definitions for the Compute@Edge platform ABI.
The
witxfile format is an experimental format which is based on the module linking text format (wit), (which is in turn based on the wat format, which is based on S-expressions). It adds some features using the same syntax as interface types, some features with syntax similar to gc types, as well as a few special features of its own.
witxis actively evolving. Expect backwards-incompatible changes, particularly in the areas wherewitxdiffers fromwit.The initial goal for
witxis just to have a language suitable for expressing WASI APIs in, to serve as the vocabulary for proposing changes to existing APIs and proposing new APIs. Initially, while it uses some of the syntax and concepts from interface types, it doesn't currently imply the full interface types specification, or the use of the interface types custom sections.We expect that eventually we will transition to using the full interface types specification, with
witxhaving minimal additional features. Until then, the goals here are to remain aligned with interface types and other relevant WebAssembly standards and proposals wherever practical, and to be an input into the design process of interface types.