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Diffstat (limited to 'src/test/ui/try-trait/option-to-result.stderr')
| -rw-r--r-- | src/test/ui/try-trait/option-to-result.stderr | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/ui/try-trait/option-to-result.stderr b/src/test/ui/try-trait/option-to-result.stderr new file mode 100644 index 000000000..ae5c3ad62 --- /dev/null +++ b/src/test/ui/try-trait/option-to-result.stderr @@ -0,0 +1,35 @@ +error[E0277]: the `?` operator can only be used on `Result`s, not `Option`s, in a function that returns `Result` + --> $DIR/option-to-result.rs:5:6 + | +LL | / fn test_result() -> Result<(),()> { +LL | | let a:Option<()> = Some(()); +LL | | a?; + | | ^ use `.ok_or(...)?` to provide an error compatible with `Result<(), ()>` +LL | | Ok(()) +LL | | } + | |_- this function returns a `Result` + | + = help: the trait `FromResidual<Option<Infallible>>` is not implemented for `Result<(), ()>` + = help: the following other types implement trait `FromResidual<R>`: + <Result<T, F> as FromResidual<Result<Infallible, E>>> + <Result<T, F> as FromResidual<Yeet<E>>> + +error[E0277]: the `?` operator can only be used on `Option`s, not `Result`s, in a function that returns `Option` + --> $DIR/option-to-result.rs:11:6 + | +LL | / fn test_option() -> Option<i32>{ +LL | | let a:Result<i32, i32> = Ok(5); +LL | | a?; + | | ^ use `.ok()?` if you want to discard the `Result<Infallible, i32>` error information +LL | | Some(5) +LL | | } + | |_- this function returns an `Option` + | + = help: the trait `FromResidual<Result<Infallible, i32>>` is not implemented for `Option<i32>` + = help: the following other types implement trait `FromResidual<R>`: + <Option<T> as FromResidual<Yeet<()>>> + <Option<T> as FromResidual> + +error: aborting due to 2 previous errors + +For more information about this error, try `rustc --explain E0277`. |