rust/tests/ui/coercion/mut-trait-object-coercion-8398.rs

// https://github.com/rust-lang/rust/issues/8398
//@ check-pass
#![allow(dead_code)]

pub trait Writer {
    fn write(&mut self, b: &[u8]) -> Result<(), ()>;
}

fn foo(a: &mut dyn Writer) {
    a.write(&[]).unwrap();
}

pub fn main(){}
Rehome tests/ui/issues/ tests [5/?] 2025-07-13 16:56:31 -04:00			`// https://github.com/rust-lang/rust/issues/8398`
Use check-pass in ui tests where appropriate 2019-11-04 00:00:00 +00:00			`//@ check-pass`
Add `#![allow(..)]` as necessary to get re-migrated run-pass tests compiling with clean stderr again. Most were added mechanically. 2018-09-25 23:51:35 +02:00			`#![allow(dead_code)]`
rustdoc: Replace no-pretty-expanded with pretty-expanded Now that features must be declared expanded source often does not compile. This adds 'pretty-expanded' to a bunch of test cases that still work. 2015-03-22 13:13:15 -07:00
test: Fix fallout in run-pass tests 2015-04-10 11:12:43 -07:00			`pub trait Writer {`
			`fn write(&mut self, b: &[u8]) -> Result<(), ()>;`
			`}`
Add even more tests Closes #8248 Closes #8249 Closes #8398 Closes #8401 2013-08-15 14:22:36 -07:00
Update ui test suite to use dyn 2019-05-28 14:46:13 -04:00			`fn foo(a: &mut dyn Writer) {`
Fix fallout from coercion removal 2014-11-17 21:39:01 +13:00			`a.write(&[]).unwrap();`
Add even more tests Closes #8248 Closes #8249 Closes #8398 Closes #8401 2013-08-15 14:22:36 -07:00			`}`

Fix run-pass tests to have 'pub fn main' This is required by the check-fast target because each test is slurped up into a submodule. 2013-09-25 00:43:37 -07:00			`pub fn main(){}`