diff options
Diffstat (limited to 'src/tools/clippy/tests/ui/bind_instead_of_map.rs')
-rw-r--r-- | src/tools/clippy/tests/ui/bind_instead_of_map.rs | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/bind_instead_of_map.rs b/src/tools/clippy/tests/ui/bind_instead_of_map.rs new file mode 100644 index 000000000..623b100a4 --- /dev/null +++ b/src/tools/clippy/tests/ui/bind_instead_of_map.rs @@ -0,0 +1,25 @@ +// run-rustfix +#![deny(clippy::bind_instead_of_map)] + +// need a main anyway, use it get rid of unused warnings too +pub fn main() { + let x = Some(5); + // the easiest cases + let _ = x.and_then(Some); + let _ = x.and_then(|o| Some(o + 1)); + // and an easy counter-example + let _ = x.and_then(|o| if o < 32 { Some(o) } else { None }); + + // Different type + let x: Result<u32, &str> = Ok(1); + let _ = x.and_then(Ok); +} + +pub fn foo() -> Option<String> { + let x = Some(String::from("hello")); + Some("hello".to_owned()).and_then(|s| Some(format!("{}{}", s, x?))) +} + +pub fn example2(x: bool) -> Option<&'static str> { + Some("a").and_then(|s| Some(if x { s } else { return None })) +} |