A Stable Modular ABI for Rust

[zicklag]

@Tom-Phinney

Another goal of this effort, IMO, is development of the in-language descriptive mechanisms needed to specify repr(Rust) , such as assignment of enum variants to niches in a unified enum representation (e.g., Option ). The expectation is that such descriptive mechanisms will also be usable to specify inter -language ABIs (i.e, Rust to non-Rust) such as repr(Swift) . It is that latter potential that makes Rust a potential run-time bridging languages between binaries that use incompatible ABIs.

Yes, I think primarily the goal of this effort is to produce a way to create ABI plugins for Rust that can be swapped out. The specification for this modular ABI mechanism should be able to at least supply a stable Rust-to-Rust ABI and provide Rust-to-OtherLanguage ABIs.