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Diffstat (limited to '')
| -rw-r--r-- | src/test/ui/try-trait/try-operator-on-main.stderr | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/src/test/ui/try-trait/try-operator-on-main.stderr b/src/test/ui/try-trait/try-operator-on-main.stderr new file mode 100644 index 000000000..ad55f40b5 --- /dev/null +++ b/src/test/ui/try-trait/try-operator-on-main.stderr @@ -0,0 +1,63 @@ +error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) + --> $DIR/try-operator-on-main.rs:7:31 + | +LL | / fn main() { +LL | | // error for a `Try` type on a non-`Try` fn +LL | | std::fs::File::open("foo")?; + | | ^ cannot use the `?` operator in a function that returns `()` +LL | | +... | +LL | | try_trait_generic::<()>(); +LL | | } + | |_- this function should return `Result` or `Option` to accept `?` + | + = help: the trait `FromResidual<Result<Infallible, std::io::Error>>` is not implemented for `()` + +error[E0277]: the `?` operator can only be applied to values that implement `Try` + --> $DIR/try-operator-on-main.rs:10:5 + | +LL | ()?; + | ^^^ the `?` operator cannot be applied to type `()` + | + = help: the trait `Try` is not implemented for `()` + +error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `FromResidual`) + --> $DIR/try-operator-on-main.rs:10:7 + | +LL | / fn main() { +LL | | // error for a `Try` type on a non-`Try` fn +LL | | std::fs::File::open("foo")?; +LL | | +LL | | // a non-`Try` type on a non-`Try` fn +LL | | ()?; + | | ^ cannot use the `?` operator in a function that returns `()` +... | +LL | | try_trait_generic::<()>(); +LL | | } + | |_- this function should return `Result` or `Option` to accept `?` + | + = help: the trait `FromResidual<_>` is not implemented for `()` + +error[E0277]: the trait bound `(): Try` is not satisfied + --> $DIR/try-operator-on-main.rs:14:25 + | +LL | try_trait_generic::<()>(); + | ^^ the trait `Try` is not implemented for `()` + | +note: required by a bound in `try_trait_generic` + --> $DIR/try-operator-on-main.rs:17:25 + | +LL | fn try_trait_generic<T: Try>() -> T { + | ^^^ required by this bound in `try_trait_generic` + +error[E0277]: the `?` operator can only be applied to values that implement `Try` + --> $DIR/try-operator-on-main.rs:19:5 + | +LL | ()?; + | ^^^ the `?` operator cannot be applied to type `()` + | + = help: the trait `Try` is not implemented for `()` + +error: aborting due to 5 previous errors + +For more information about this error, try `rustc --explain E0277`. |