Feature gate: `#![feature(io_const_error)]`

[sskyblue1010]

Feature gate: #![feature(io_const_error)]

This is a tracking issue for const_error!, a macro to create io::Errors from a string literal without allocating.

Public API

// std::io

macro const_error($kind:expr, $message:expr $(,)?) { ... }

Steps / History

• ACP: Expose the internal SimpleMessage struct and allow creating std::io::Errors with them rust-lang/libs-team#205
• Implementation: #...
• Final comment period (FCP)¹
• Stabilization PR

Unresolved Questions

• None yet.

Originally posted by @joboet in rust-lang/rust#133448

Footnotes

1. https://std-dev-guide.rust-lang.org/feature-lifecycle/stabilization.html ↩