3 #![warn(clippy::option_map_unit_fn)]
6 fn do_nothing<T>(_: T) {}
8 fn diverge<T>(_: T) -> ! {
12 fn plus_one(value: usize) -> usize {
21 fn do_option_nothing(self: &Self, value: usize) {}
23 fn do_option_plus_one(self: &Self, value: usize) -> usize {
28 fn option_map_unit_fn() {
29 let x = HasOption { field: Some(10) };
31 x.field.map(plus_one);
32 let _ : Option<()> = x.field.map(do_nothing);
34 if let Some(x_field) = x.field { do_nothing(x_field) }
36 if let Some(x_field) = x.field { do_nothing(x_field) }
38 if let Some(x_field) = x.field { diverge(x_field) }
41 if let Some(value) = x.field { do_nothing(value + captured) };
42 let _ : Option<()> = x.field.map(|value| do_nothing(value + captured));
44 if let Some(value) = x.field { x.do_option_nothing(value + captured) }
46 if let Some(value) = x.field { x.do_option_plus_one(value + captured); }
49 if let Some(value) = x.field { do_nothing(value + captured) }
51 if let Some(value) = x.field { do_nothing(value + captured) }
53 if let Some(value) = x.field { do_nothing(value + captured); }
55 if let Some(value) = x.field { do_nothing(value + captured); }
58 if let Some(value) = x.field { diverge(value + captured) }
60 if let Some(value) = x.field { diverge(value + captured) }
62 if let Some(value) = x.field { diverge(value + captured); }
64 if let Some(value) = x.field { diverge(value + captured); }
67 x.field.map(|value| plus_one(value + captured));
68 x.field.map(|value| { plus_one(value + captured) });
69 if let Some(value) = x.field { let y = plus_one(value + captured); }
71 if let Some(value) = x.field { plus_one(value + captured); }
73 if let Some(value) = x.field { plus_one(value + captured); }
76 if let Some(ref value) = x.field { do_nothing(value + captured) }}