Comment by justcuriousab
4 days ago
> If WG21 were handling Rust instead f64 would implement Ord, and people would just write unsafe blocks with no explanation in the implementation of supposedly "safe" functions. Rust's technology doesn't care but their culture does.
But Rust allows pattern matching on floats.
https://play.rust-lang.org/?version=stable&mode=debug&editio...
Rust Zulip is C++ WG21 confirmed?
I'm sure you think this was somehow succinctly making your point, but I can't see any connection at all, so if you did have an actual point you're going to need to explain it.
Float matching in Rust is not supported due to correctness concerns, but due to historical accidents and backwards compatibility.
https://github.com/rust-lang/rust/issues/41620#issuecomment-...
https://github.com/rust-lang/rust/pull/84045#issuecomment-82...
OK? I don't see how that's connected? It's not controversial that f32 and f64 are partially ordered, the problem in C++ is that the difference between "Partially Ordered" and "Totally Ordered" is semantic not syntactic in their language and all semantic mistakes are just IFNDR so it's a footgun.
1 reply →