2 #![warn(clippy::option_if_let_else)]
3 #![allow(clippy::redundant_closure)]
5 fn bad1(string: Option<&str>) -> (bool, &str) {
6 string.map_or((false, "hello"), |x| (true, x))
9 fn else_if_option(string: Option<&str>) -> Option<(bool, &str)> {
12 } else { string.map_or(Some((false, "")), |x| Some((true, x))) }
15 fn unop_bad(string: &Option<&str>, mut num: Option<i32>) {
16 let _ = string.map_or(0, |s| s.len());
17 let _ = num.as_ref().map_or(&0, |s| s);
18 let _ = num.as_mut().map_or(&mut 0, |s| {
22 let _ = num.as_ref().map_or(&0, |s| s);
23 let _ = num.map_or(0, |mut s| {
27 let _ = num.as_mut().map_or(&mut 0, |s| {
33 fn longer_body(arg: Option<u32>) -> u32 {
40 fn impure_else(arg: Option<i32>) {
41 let side_effect = || {
45 let _ = arg.map_or_else(|| side_effect(), |x| x);
48 fn test_map_or_else(arg: Option<u32>) {
49 let _ = arg.map_or_else(|| {
54 }, |x| x * x * x * x);
57 fn negative_tests(arg: Option<u32>) -> u32 {
58 let _ = if let Some(13) = arg { "unlucky" } else { "lucky" };
60 let _ = if let Some(x) = arg {
66 let _ = if let Some(x) = arg {
75 let optional = Some(5);
76 let _ = optional.map_or(5, |x| x + 2);
78 let _ = else_if_option(None);
79 unop_bad(&None, None);
80 let _ = longer_body(None);
81 test_map_or_else(None);
82 let _ = negative_tests(None);
83 let _ = impure_else(None);