alt Hacker NewsWe should be able to set at a crate level whether our code can compile with panics, implicit conversions, etc. And we should be able to blacklist dependencies and transitive dependencies that do these things. We should be able to advertise a crate's safety and attention to detail.
Higher level application code can benefit from this, but core libraries should forbid this statically and be prevented from even compiling or being imported should these things be enabled.
We should be able to filter crates.io by these properties, and force our own projects to abide by them.
I want nopanic, nocoerscion, maxdependencydepth, rustonly, nolinking, etc. flags.
Do you have some specific coercion in mind that you want to forbid? Unlike C, Rust is extremely tame when it comes to coercions. Forbidding coercions in general in Rust code doesn't really make sense, and I can't think of any that aren't either beneficial at best or benign at worst.