3 #![warn(clippy::option_map_unit_fn)]
5 #![allow(clippy::unnecessary_wraps)]
7 fn do_nothing<T>(_: T) {}
9 fn diverge<T>(_: T) -> ! {
13 fn plus_one(value: usize) -> usize {
17 fn option() -> Option<usize> {
26 fn do_option_nothing(&self, value: usize) {}
28 fn do_option_plus_one(&self, value: usize) -> usize {
33 fn option_map_unit_fn() {
34 let x = HasOption { field: Some(10) };
36 x.field.map(plus_one);
37 let _ : Option<()> = x.field.map(do_nothing);
39 if let Some(x_field) = x.field { do_nothing(x_field) }
41 if let Some(x_field) = x.field { do_nothing(x_field) }
43 if let Some(x_field) = x.field { diverge(x_field) }
46 if let Some(value) = x.field { do_nothing(value + captured) };
47 let _ : Option<()> = x.field.map(|value| do_nothing(value + captured));
49 if let Some(value) = x.field { x.do_option_nothing(value + captured) }
51 if let Some(value) = x.field { x.do_option_plus_one(value + captured); }
54 if let Some(value) = x.field { do_nothing(value + captured) }
56 if let Some(value) = x.field { do_nothing(value + captured) }
58 if let Some(value) = x.field { do_nothing(value + captured); }
60 if let Some(value) = x.field { do_nothing(value + captured); }
63 if let Some(value) = x.field { diverge(value + captured) }
65 if let Some(value) = x.field { diverge(value + captured) }
67 if let Some(value) = x.field { diverge(value + captured); }
69 if let Some(value) = x.field { diverge(value + captured); }
72 x.field.map(|value| plus_one(value + captured));
73 x.field.map(|value| { plus_one(value + captured) });
74 if let Some(value) = x.field { let y = plus_one(value + captured); }
76 if let Some(value) = x.field { plus_one(value + captured); }
78 if let Some(value) = x.field { plus_one(value + captured); }
81 if let Some(ref value) = x.field { do_nothing(value + captured) }
83 if let Some(a) = option() { do_nothing(a) }
85 if let Some(value) = option() { println!("{:?}", value) }