Tracking Issue for Lifetime Capture Rules 2024 (RFC 3498)

[traviscross]

This is a tracking issue for the RFC 3498, "Lifetime Capture Rules 2024" (rust-lang/rfcs#3498). The feature gate for the issue is #![feature(lifetime_capture_rules_2024)].

In Rust 2024 and later editions, return position impl Trait (RPIT) opaque types will automatically capture all in-scope type and lifetime parameters. In preparation for this, new RPIT-like impl Trait features introduced into earlier editions will also automatically capture all in-scope type and lifetime parameters.

About tracking issues

Tracking issues are used to record the overall progress of implementation. They are also used as hubs connecting to other relevant issues, e.g., bugs or open design questions. A tracking issue is however not meant for large scale discussion, questions, or bug reports about a feature. Instead, open a dedicated issue for the specific matter and add the relevant feature gate label.

Steps

• Implement the RFC: Implement 2024-edition lifetime capture rules RFC #116952
• Stabilize some means of precise capturing
  • Stabilize opaque type precise capturing (RFC 3617) #127672
• Connect the impl_trait_overcaptures lint to rust_2024_compatibility.
  • Tie impl_trait_overcaptures lint to Rust 2024 #129600
• Add documentation to the reference.
  • Add capturing and precise capturing rules reference#1577
  • Add Lifetime Capture Rules 2024 reference#1601
• Add documentation to the edition guide.
  • Add chapter for Lifetime Capture Rules 2024 edition-guide#316
• Implement the rules for RPITIT/AFIT
  • Make RPITITs capture all in-scope lifetimes #114489
  • Capture lifetimes for associated type bounds destined to be lowered to opaques #115366
• Stabilize the rules for RPITIT/AFIT
  • Stabilize async fn and return-position impl Trait in trait #115822
• Implement the rules for ATPIT
  • Capture all lifetimes for TAITs and impl trait in associated types #114616
  • Make TAITs and ATPITs capture late-bound lifetimes in scope #122103
• Stabilization PR (in nightly Rust 2024)
  • Implement 2024-edition lifetime capture rules RFC #116952
• Stabilize Rust 2024

Related

• Use edition = "2024" in the compiler #129636