G.FUD.01 Less than 5 function parameters

[Level] Advice

[Description]

In order to improve readability of code, it's better to set less than 5 function's parameters.

[Bad Case]

#![allow(unused)]
fn main() {
struct Color;
// Not Good
fn foo(x: f32, y: f32, name: &str, c: Color, w: u32, h: u32, a: u32, b: u32) {
    // ..
}
}

[Good Case]

Refine function's parameters as possible.

struct Color;
// Good: use const generic here to receive multiple u32 typed parameters afterward.
// use tuple to refine 2~3 parameters as one.
fn foo<T, const N: usize>(x: (f32, f32), name: &str, c: Color, last: [T;N]) {
    ;
}

fn main() {
    let arr = [1u32, 2u32];
    foo((1.0f32, 2.0f32), "hello", Color, arr);
    let arr = [1.0f32, 2.0f32, 3.0f32];
    foo((1.0f32, 2.0f32), "hello", Color, arr);
}

[Lint Check]

This lint corresponds to the following configuration of clippy.toml:

# less than 5 parameters
too-many-arguments-threshold=5