Tracking Issue for `#![feature(diagnostic_namespace)]`

[weiznich]

Feature gate: #![feature(diagnostic_namespace)]

This is a tracking issue for RFC 3368, which introduces a #[diagnostic] attribute namespace for attributes that affect the compiler diagnostics. Using an unknown attribute in this attribute namespace should only result in a warning.

Public API

#[diagnostic::something] // generates a lint warning.
pub struct Magic;

Steps / History

• Implementation: Diagnostic namespace #111780
• Final comment period (FCP)¹: Stabilize the #[diagnostic] namespace and #[diagnostic::on_unimplemented] attribute #119888 (comment)
• Stabilization PR: Stabilize the #[diagnostic] namespace and #[diagnostic::on_unimplemented] attribute #119888

Unresolved Questions

• None yet. (All unresolved questions in the RFC are related to the design of the #[diagnostic::on_unimplemented] attribute, which likely will use a different feature)

Footnotes

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