mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-17 02:08:28 +00:00
69d439065e
Adds a check on `.map(..).flatten()` on `Result` type that follows the behaviour on `Option` type.
30 lines
1.1 KiB
Rust
30 lines
1.1 KiB
Rust
// run-rustfix
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#![warn(clippy::all, clippy::pedantic)]
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#![allow(clippy::let_underscore_drop)]
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#![allow(clippy::missing_docs_in_private_items)]
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#![allow(clippy::map_identity)]
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#![allow(clippy::unnecessary_wraps)]
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#![feature(result_flattening)]
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fn main() {
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// mapping to Option on Iterator
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fn option_id(x: i8) -> Option<i8> {
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Some(x)
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}
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let option_id_ref: fn(i8) -> Option<i8> = option_id;
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let option_id_closure = |x| Some(x);
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let _: Vec<_> = vec![5_i8; 6].into_iter().map(option_id).flatten().collect();
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let _: Vec<_> = vec![5_i8; 6].into_iter().map(option_id_ref).flatten().collect();
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let _: Vec<_> = vec![5_i8; 6].into_iter().map(option_id_closure).flatten().collect();
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let _: Vec<_> = vec![5_i8; 6].into_iter().map(|x| x.checked_add(1)).flatten().collect();
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// mapping to Iterator on Iterator
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let _: Vec<_> = vec![5_i8; 6].into_iter().map(|x| 0..x).flatten().collect();
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// mapping to Option on Option
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let _: Option<_> = (Some(Some(1))).map(|x| x).flatten();
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// mapping to Result on Result
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let _: Result<_, &str> = (Ok(Ok(1))).map(|x| x).flatten();
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}
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