clippy::neg_multiply results in inconsistent code

[pacak]

Summary

I'm not sure if it's false positive or false negative. I'm okay with having it either way as long as it is uniform

Lint Name

clippy::neg_multiply

Reproducer

I tried this code:

pub const KNOTS: [f64; NUM_KNOTS] = [
    -3.0 * SCALE,
    -1.0 * SCALE,
    1.0 * SCALE,
    3.0 * SCALE,
];

I saw this happen:

clippy suggested to replace second constant with -SCALE but left everything as is.

I expected to see this happen:

Either leave things as is OR fix the third constant as well.

This is from pre-release testing version of 1.88

Version

rustc 1.88.0 (6b00bc388 2025-06-23)
binary: rustc
commit-hash: 6b00bc3880198600130e1cf62b8f8a93494488cc
commit-date: 2025-06-23
host: x86_64-unknown-linux-gnu
release: 1.88.0
LLVM version: 20.1.5

Additional Labels

No response

[samueltardieu]

The lint is called neg_multiply because it only deals with multiplication with minus one as a way to negate a value. What you are saying is that you would like to get multiplication by one flagged as well, but this is not a bug.

@rustbot label -C-bug -I-false-positive +C-feature-request