mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-15 09:27:25 +00:00
125 lines
3.2 KiB
Rust
125 lines
3.2 KiB
Rust
//@run-rustfix
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#![allow(dead_code)]
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#![warn(clippy::manual_find_map)]
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#![allow(clippy::redundant_closure)] // FIXME suggestion may have redundant closure
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#![allow(clippy::useless_vec)]
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fn main() {
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// is_some(), unwrap()
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let _ = (0..).find_map(|a| to_opt(a));
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// ref pattern, expect()
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let _ = (0..).find_map(|a| to_opt(a));
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// is_ok(), unwrap_or()
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let _ = (0..).find_map(|a| to_res(a).ok());
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let _ = (1..5)
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.find_map(|y| *to_ref(to_opt(y)));
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let _ = (1..5)
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.find_map(|y| *to_ref(to_opt(y)));
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let _ = (1..5)
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.find_map(|y| to_ref(to_res(y)).ok());
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let _ = (1..5)
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.find_map(|y| to_ref(to_res(y)).ok());
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}
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#[rustfmt::skip]
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fn simple_equal() {
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iter::<Option<u8>>().find_map(|x| x);
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iter::<&Option<u8>>().find_map(|x| *x);
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iter::<&&Option<u8>>().find_map(|x| **x);
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iter::<Option<&u8>>().find_map(|x| x.cloned());
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iter::<&Option<&u8>>().find_map(|x| x.cloned());
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iter::<&Option<String>>().find_map(|x| x.as_deref());
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iter::<Option<&String>>().find_map(|y| to_ref(y).cloned());
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iter::<Result<u8, ()>>().find_map(|x| x.ok());
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iter::<&Result<u8, ()>>().find_map(|x| x.ok());
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iter::<&&Result<u8, ()>>().find_map(|x| x.ok());
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iter::<Result<&u8, ()>>().find_map(|x| x.cloned().ok());
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iter::<&Result<&u8, ()>>().find_map(|x| x.cloned().ok());
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iter::<&Result<String, ()>>().find_map(|x| x.as_deref().ok());
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iter::<Result<&String, ()>>().find_map(|y| to_ref(y).cloned().ok());
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}
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fn no_lint() {
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// no shared code
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let _ = (0..).filter(|n| *n > 1).map(|n| n + 1);
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// very close but different since filter() provides a reference
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let _ = (0..).find(|n| to_opt(n).is_some()).map(|a| to_opt(a).unwrap());
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// similar but different
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let _ = (0..).find(|n| to_opt(n).is_some()).map(|n| to_res(n).unwrap());
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let _ = (0..)
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.find(|n| to_opt(n).map(|n| n + 1).is_some())
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.map(|a| to_opt(a).unwrap());
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}
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fn iter<T>() -> impl Iterator<Item = T> {
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std::iter::empty()
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}
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fn to_opt<T>(_: T) -> Option<T> {
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unimplemented!()
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}
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fn to_res<T>(_: T) -> Result<T, ()> {
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unimplemented!()
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}
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fn to_ref<'a, T>(_: T) -> &'a T {
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unimplemented!()
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}
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struct Issue8920<'a> {
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option_field: Option<String>,
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result_field: Result<String, ()>,
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ref_field: Option<&'a usize>,
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}
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fn issue_8920() {
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let mut vec = vec![Issue8920 {
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option_field: Some(String::from("str")),
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result_field: Ok(String::from("str")),
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ref_field: Some(&1),
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}];
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let _ = vec
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.iter()
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.find_map(|f| f.option_field.clone());
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let _ = vec
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.iter()
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.find_map(|f| f.ref_field.cloned());
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let _ = vec
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.iter()
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.find_map(|f| f.ref_field.copied());
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let _ = vec
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.iter()
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.find_map(|f| f.result_field.clone().ok());
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let _ = vec
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.iter()
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.find_map(|f| f.result_field.as_ref().ok());
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let _ = vec
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.iter()
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.find_map(|f| f.result_field.as_deref().ok());
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let _ = vec
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.iter_mut()
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.find_map(|f| f.result_field.as_mut().ok());
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let _ = vec
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.iter_mut()
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.find_map(|f| f.result_field.as_deref_mut().ok());
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let _ = vec
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.iter()
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.find_map(|f| f.result_field.to_owned().ok());
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}
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