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error[E0277]: expected a `FnOnce({integer})` closure, found `Option<usize>`
--> $DIR/ruby_style_closure_successful_parse.rs:3:31
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LL | let p = Some(45).and_then({|x|
| ______________________--------_^
| | |
| | required by a bound introduced by this call
LL | | 1 + 1;
LL | | Some(x * 2)
| | ----------- this tail expression is of type `Option<usize>`
LL | | });
| |_____^ expected an `FnOnce({integer})` closure, found `Option<usize>`
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= help: the trait `FnOnce({integer})` is not implemented for `Option<usize>`
note: required by a bound in `Option::<T>::and_then`
--> $SRC_DIR/core/src/option.rs:LL:COL
help: you might have meant to open the closure body instead of placing a closure within a block
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LL - let p = Some(45).and_then({|x|
LL + let p = Some(45).and_then(|x| {
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error: aborting due to 1 previous error
For more information about this error, try `rustc --explain E0277`.
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