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

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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 16:57:23 -07:00
#![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
}
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