Decimal literal suffix of 0 (2. vs. 2.0)

[BD103]

What it does

This lint checks if a floating-point number with no decimals explicitly writes .0 or just .

In the Bevy game engine there are a lot of examples that use floating-point numbers. Because so many people contribute to these examples, there's a large mix between literals like 1.0 and 1.. Here's the most egregious example. Having a lint that picks one form and denies the other would be great for consistency, though it should probably be within the pedantic or nursery groups.

I'm not sure how a user would choose which form they prefer, though, since exclusive lints are probably not a good idea.

Advantage

• Increases consistency of writing floating point numbers by only allowing one form.

Drawbacks

• It might be difficult to implement, because there's no necessarily "correct" form. Both have their own benefits, meaning you would have to let the user decide.

Example

let x = 1.0;

Could be written as:

let x = 1.;

And vice-versa.

[Alexendoo]

Looks like there's a pending effort to get this into rustfmt - rust-lang/rustfmt#5834

[BD103]

Awesome, I didn't see that in my initial search. Thanks for pointing it out!