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 x.field.map(do_nothing);
36 x.field.map(do_nothing);
41 if let Some(value) = x.field { do_nothing(value + captured) };
42 let _ : Option<()> = x.field.map(|value| do_nothing(value + captured));
44 x.field.map(|value| x.do_option_nothing(value + captured));
46 x.field.map(|value| { x.do_option_plus_one(value + captured); });
49 x.field.map(|value| do_nothing(value + captured));
51 x.field.map(|value| { do_nothing(value + captured) });
53 x.field.map(|value| { do_nothing(value + captured); });
55 x.field.map(|value| { { do_nothing(value + captured); } });
58 x.field.map(|value| diverge(value + captured));
60 x.field.map(|value| { diverge(value + captured) });
62 x.field.map(|value| { diverge(value + captured); });
64 x.field.map(|value| { { diverge(value + captured); } });
67 x.field.map(|value| plus_one(value + captured));
68 x.field.map(|value| { plus_one(value + captured) });
69 x.field.map(|value| { let y = plus_one(value + captured); });
71 x.field.map(|value| { plus_one(value + captured); });
73 x.field.map(|value| { { plus_one(value + captured); } });
76 x.field.map(|ref value| { do_nothing(value + captured) });}