mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-05 03:36:21 +00:00
cd8c5f78ec
Avoid ref when using format! in compiler
Clean up a few minor refs in `format!` macro, as it has a performance cost. Apparently the compiler is unable to inline `format!("{}", &variable)`, and does a run-time double-reference instead (format macro already does one level referencing). Inlining format args prevents accidental `&` misuse.
See also https://github.com/rust-lang/rust-clippy/issues/10851
For high-level intro to how type checking works in rustc, see the type checking chapter of the rustc dev guide.