On Tue, Mar 31, 2026 at 4:59 PM Miguel Ojeda <[email protected]> wrote: > > Clippy in Rust 1.88.0 (only) reports [1]: > > warning: variables can be used directly in the `format!` string > --> rust/macros/module.rs:112:23 > | > 112 | let content = format!("{param}:{content}", param = param, > content = content); > | > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > | > = help: for further information visit > https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args > = note: `-W clippy::uninlined-format-args` implied by `-W clippy::all` > = help: to override `-W clippy::all` add > `#[allow(clippy::uninlined_format_args)]` > help: change this to > | > 112 - let content = format!("{param}:{content}", param = param, > content = content); > 112 + let content = format!("{param}:{content}"); > > warning: variables can be used directly in the `format!` string > --> rust/macros/module.rs:198:14 > | > 198 | t => panic!("Unsupported parameter type {}", t), > | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > | > = help: for further information visit > https://rust-lang.github.io/rust-clippy/master/index.html#uninlined_format_args > = note: `-W clippy::uninlined-format-args` implied by `-W clippy::all` > = help: to override `-W clippy::all` add > `#[allow(clippy::uninlined_format_args)]` > help: change this to > | > 198 - t => panic!("Unsupported parameter type {}", t), > 198 + t => panic!("Unsupported parameter type {t}"), > | > > The reason it only triggers in that version is that the lint was moved > from `pedantic` to `style` in Rust 1.88.0 and then back to `pedantic` > in Rust 1.89.0 [2][3]. > > In the first case, the suggestion is fair and a pure simplification, thus > we will clean it up separately. > > To keep the behavior the same across all versions, and since the lint > does not work for all macros (e.g. custom ones like `pr_info!`), disable > it globally.
Seeing this patch a bit late but in clippy 1.85.0 there is `#[clippy::format_args]` which would permit us to make the lint work with our custom macros. https://doc.rust-lang.org/nightly/clippy/attribs.html#clippyformat_args
