2019-09-25 13:50:23 +02:00
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// run-rustfix
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2018-09-21 09:26:38 +02:00
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#![warn(clippy::all, clippy::pedantic)]
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2020-11-09 00:32:12 +01:00
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#![allow(clippy::let_underscore_drop)]
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2018-09-21 09:26:38 +02:00
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#![allow(clippy::missing_docs_in_private_items)]
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2020-06-08 06:35:10 +02:00
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#![allow(clippy::map_identity)]
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2018-09-21 09:26:38 +02:00
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fn main() {
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2020-07-30 21:20:31 +02:00
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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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2020-07-25 19:04:59 +02:00
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let _: Vec<_> = vec![5_i8; 6].into_iter().map(|x| x.checked_add(1)).flatten().collect();
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2020-07-30 21:20:31 +02:00
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// mapping to Iterator on Iterator
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2018-09-21 09:26:38 +02:00
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let _: Vec<_> = vec![5_i8; 6].into_iter().map(|x| 0..x).flatten().collect();
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2020-07-30 21:20:31 +02:00
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// mapping to Option on Option
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2020-04-15 19:06:41 +02:00
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let _: Option<_> = (Some(Some(1))).map(|x| x).flatten();
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2018-09-21 09:26:38 +02:00
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}
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