diff options
Diffstat (limited to '')
-rw-r--r-- | src/tools/clippy/tests/ui/ok_expect.rs | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/ok_expect.rs b/src/tools/clippy/tests/ui/ok_expect.rs new file mode 100644 index 000000000..ff68d38c7 --- /dev/null +++ b/src/tools/clippy/tests/ui/ok_expect.rs @@ -0,0 +1,27 @@ +use std::io; + +struct MyError(()); // doesn't implement Debug + +#[derive(Debug)] +struct MyErrorWithParam<T> { + x: T, +} + +fn main() { + let res: Result<i32, ()> = Ok(0); + let _ = res.unwrap(); + + res.ok().expect("disaster!"); + // the following should not warn, since `expect` isn't implemented unless + // the error type implements `Debug` + let res2: Result<i32, MyError> = Ok(0); + res2.ok().expect("oh noes!"); + let res3: Result<u32, MyErrorWithParam<u8>> = Ok(0); + res3.ok().expect("whoof"); + let res4: Result<u32, io::Error> = Ok(0); + res4.ok().expect("argh"); + let res5: io::Result<u32> = Ok(0); + res5.ok().expect("oops"); + let res6: Result<u32, &str> = Ok(0); + res6.ok().expect("meh"); +} |