33 lines
1.3 KiB
Plaintext
33 lines
1.3 KiB
Plaintext
error[E0277]: the `?` operator can only be used in a function that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
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--> $DIR/try-on-option-diagnostics.rs:7:5
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LL | / fn a_function() -> u32 {
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LL | | let x: Option<u32> = None;
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LL | | x?;
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| | ^^ cannot use the `?` operator in a function that returns `u32`
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LL | | 22
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LL | | }
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| |_- this function should return `Result` or `Option` to accept `?`
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= help: the trait `std::ops::Try` is not implemented for `u32`
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= note: required by `std::ops::Try::from_error`
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error[E0277]: the `?` operator can only be used in a closure that returns `Result` or `Option` (or another type that implements `std::ops::Try`)
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--> $DIR/try-on-option-diagnostics.rs:14:9
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LL | let a_closure = || {
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| _____________________-
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LL | | let x: Option<u32> = None;
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LL | | x?;
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| | ^^ cannot use the `?` operator in a closure that returns `{integer}`
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LL | | 22
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LL | | };
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| |_____- this function should return `Result` or `Option` to accept `?`
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= help: the trait `std::ops::Try` is not implemented for `{integer}`
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= note: required by `std::ops::Try::from_error`
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error: aborting due to 2 previous errors
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For more information about this error, try `rustc --explain E0277`.
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