rust/tests/ui/lint/trivial-casts.rs

#![deny(trivial_casts, trivial_numeric_casts)]

fn main() {
    let lugubrious = 12i32 as i32;
    //~^ ERROR trivial numeric cast
    let haunted: &u32 = &99;
    let _ = haunted as *const u32;
    //~^ ERROR trivial cast
}
in which the trivial-casts word to the wise is tucked into a help note The top level message shouldn't be too long; the replaced-by-coercion/temporary-variable advice can live in a note. Also, don't mention type ascription when it's not actually available as a real thing. (The current state of discussion on the type ascription tracking issue #23416 makes one rather suspect it will never be a stable thing in its current form, but that's not for us to adjudicate in this commit.) While we're here, yank out the differentiating parts of the numeric/other conditional and only have one codepath emitting the diagnostic. 2018-06-23 23:57:23 +00:00			`#![deny(trivial_casts, trivial_numeric_casts)]`

			`fn main() {`
			`let lugubrious = 12i32 as i32;`
			`//~^ ERROR trivial numeric cast`
			`let haunted: &u32 = &99;`
			`let _ = haunted as *const u32;`
			`//~^ ERROR trivial cast`
			`}`