unecessary cast false positive

[arifd]

Summary

This code will fail to compile:

fn main() {
    let n: f64 = 1.0;
    let _: f64 = (0.05).min(n);
}

making a cast necessary (or preferable to 0.05f64 IMO).

Writing this code, will compile, but causes clippy to warn:

fn main() {
    let n: f64 = 1.0;
    let _: f64 = (0.05 as f64).min(n);
}

I suspect it might be really difficult to solve this in a non-hacky way, but thought I would create this issue to at least raise awareness.

Lint Name

unecessary cast

Reproducer

No response

Version

rust playground stable 1.83.0: https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=115441b5376a81c65d1cd21c2d86ac6d

Additional Labels

No response

[Centri3]

I suspect it might be really difficult to solve this in a non-hacky way

Seems doable 👍 Just need to check that the parent expression isn't one of the shared float methods (though trait methods would be fine here afaik. Just checking the name isn't 100% thorough!)

^- Actually, thought this was initially about the suggestion being incorrect; so this is more subjective. I do think 0.05f64 is right.

[arifd]

Yes, to be clear 0.05f64 will (correctly) silence the clippy warning, but I think as f64 should also silence it.