rust/tests/ui/cast/cast-to-infer-ty.rs

// run-pass
// Check that we allow a cast to `_` so long as the target type can be
// inferred elsewhere.

pub fn main() {
    let i: *const i32 = 0 as _;
    assert!(i.is_null());
}
tests: Add missing run-pass annotations 2019-07-26 21:54:25 +00:00			`// run-pass`
Be a bit more constrained in our early check Do not require the target type to be fully known, either. This allows code like `let x: *const () = 0 as _` to work (see regression test). 2016-04-14 13:57:55 +00:00			// Check that we allow a cast to `_` so long as the target type can be
			`// inferred elsewhere.`

			`pub fn main() {`
			`let i: *const i32 = 0 as _;`
			`assert!(i.is_null());`
			`}`