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 {
16 fn option() -> Option<usize> {
25 fn do_option_nothing(self: &Self, value: usize) {}
27 fn do_option_plus_one(self: &Self, value: usize) -> usize {
32 fn option_map_unit_fn() {
33 let x = HasOption { field: Some(10) };
35 x.field.map(plus_one);
36 let _ : Option<()> = x.field.map(do_nothing);
38 if let Some(x_field) = x.field { do_nothing(x_field) }
40 if let Some(x_field) = x.field { do_nothing(x_field) }
42 if let Some(x_field) = x.field { diverge(x_field) }
45 if let Some(value) = x.field { do_nothing(value + captured) };
46 let _ : Option<()> = x.field.map(|value| do_nothing(value + captured));
48 if let Some(value) = x.field { x.do_option_nothing(value + captured) }
50 if let Some(value) = x.field { x.do_option_plus_one(value + captured); }
53 if let Some(value) = x.field { do_nothing(value + captured) }
55 if let Some(value) = x.field { do_nothing(value + captured) }
57 if let Some(value) = x.field { do_nothing(value + captured); }
59 if let Some(value) = x.field { do_nothing(value + captured); }
62 if let Some(value) = x.field { diverge(value + captured) }
64 if let Some(value) = x.field { diverge(value + captured) }
66 if let Some(value) = x.field { diverge(value + captured); }
68 if let Some(value) = x.field { diverge(value + captured); }
71 x.field.map(|value| plus_one(value + captured));
72 x.field.map(|value| { plus_one(value + captured) });
73 if let Some(value) = x.field { let y = plus_one(value + captured); }
75 if let Some(value) = x.field { plus_one(value + captured); }
77 if let Some(value) = x.field { plus_one(value + captured); }
80 if let Some(ref value) = x.field { do_nothing(value + captured) }
82 if let Some(a) = option() { do_nothing(a) }}