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rust-clippy/tests/ui/result_map_or_into_option.stderr
Nick Torres 91d8a804d3 result_map_or_into_option: add lint to catch manually adpating Result -> Option
Result<T, E> has an `ok()` method that adapts a Result<T,E> into an Option<T>.
It's possible to get around this adapter by writing Result<T,E>.map_or(None, Some).

This lint is implemented as a new variant of the existing
[`option_map_none` lint](https://github.com/rust-lang/rust-clippy/pull/2128)
2020-04-04 03:17:13 -07:00

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error: called `map_or(None, Some)` on a `Result` value. This can be done more directly by calling `ok()` instead
--> $DIR/result_map_or_into_option.rs:7:13
|
LL | let _ = opt.map_or(None, Some);
| ^^^^^^^^^^^^^^^^^^^^^^ help: try using `ok` instead: `opt.ok()`
|
= note: `-D clippy::result-map-or-into-option` implied by `-D warnings`
error: aborting due to previous error