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项目作者： core-error

项目描述 ：
std::error::Error in no_std environment.
高级语言： Rust
项目地址: git://github.com/core-error/core-error.git
创建时间： 2019-10-08T12:43:31Z
项目社区：https://github.com/core-error/core-error
开源协议：
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Core Error

Traits for working with Error in std-less environments.

Warning

This is a pre-release meant to allow experimentation and integration into the
various error handling crates. Please do not use it yet! 1.0.0 is right around
the corner.

Rationale

With the recent proliferation of error-handling crates, it has become clear that
the situation around the lack of a core::error::Error is really suboptimal. In
snafu, no_std support is being introduced through a whole new Error trait
just for no_std - which could lead to similar problems that failure had by
becoming incompatible with the ecosystem.

Ideally, the Error trait would show up in core, but due to coherence concerns
and std-dependent features being added to std::error::Error, a resolution is
unlikely to happen soon. As such, I propose making 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 others?)
  • 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.

This crate is still in the early stages. Once it reaches 1.0.0, it will be ready
for integration in the various error crates. Furthermore, once it reaches 1.0.0,
it will follow the same stability guarantees Rust does.

Usage

This crate simply provides an Error trait, which is identical to the one in std
except for not providing deprecated methods. It also contains two features:

  • std: simply reexport std::error::Error
  • alloc: implement Error on alloc Errors (incl. Box)

Libraries using this crate should forward their equivalent features to this
library.

Minimum Rust Version

This crate works all the way down to 1.0.0. It auto-detects the Rust version in
order to know which error structs to implement the trait on.

With no-default-features, the crate only compiles from 1.13.0 onwards (See #11
for the reason why this release is the minimum suported version).