An in-depth technical exploration of declarative interfaces for WebAssembly's GC (Garbage Collection) extension, focusing on the challenges of modeling recursive type groups. The author highlights gaps in the WASM spec's documentation and clarifies nuanced behaviors around subtype relationships and type table indexing.
Background
WebAssembly's GC extension introduces structured heap types with subtyping, but the spec's organization makes it difficult for implementers to reason about recursive types declaratively.
- Source
- Lobsters
- Published
- Oct 21, 2026 at 02:17 AM
- Score
- 6.0 / 10