Collaborate on a "core::Error" crate with snafu about anyhow HOT 3 CLOSED

That sounds great to me. I filed one suggestion but I am excited to see this go forward.

from anyhow.

I started working on a new crate, core-error - exposing our own version of the Error trait. The goal of this crate is twofolds:

• Provide a common trait for various error handling crates (Failure, Snafu, Fehler, Anyhow, error_chain, and any other)
• Allow no_std libraries that don't want to depend on a specific error handling crate to still expose errors that can interoperate with those libraries.

Such a crate would work like this:

• With the std feature, it just re-export std::error::*
• With no-default-features, it exposes an Error trait similar to the one in std but without backtraces, and without the std/alloc-only impls.
• Rustc version auto-detection is used to figure which errors to implement the trait on.
• The alloc feature enables downcasting, in addition to supporting alloc errors
• The crate would compile on all versions from 1.0.0 to the latest stable version.

The trait will be compatible with std's Error trait, and if libcore gains an Error trait in the future, it should be compatible with it too.

Once the crate reaches 1.0.0, I'll consider it ready for integration in the various error crates and will follow the same stability guarantee Rust does: No breaking changes ever.

Work has already started in https://github.com/core-error/core-error. I'd be interested in hearing feedback on the design!

from anyhow.

Closing as I don't think I need to track this here, we can follow up in issues of the core-error repo.

from anyhow.