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 x.field.map(do_nothing);
40 x.field.map(do_nothing);
45 if let Some(value) = x.field { do_nothing(value + captured) };
46 let _ : Option<()> = x.field.map(|value| do_nothing(value + captured));
48 x.field.map(|value| x.do_option_nothing(value + captured));
50 x.field.map(|value| { x.do_option_plus_one(value + captured); });
53 x.field.map(|value| do_nothing(value + captured));
55 x.field.map(|value| { do_nothing(value + captured) });
57 x.field.map(|value| { do_nothing(value + captured); });
59 x.field.map(|value| { { do_nothing(value + captured); } });
62 x.field.map(|value| diverge(value + captured));
64 x.field.map(|value| { diverge(value + captured) });
66 x.field.map(|value| { diverge(value + captured); });
68 x.field.map(|value| { { diverge(value + captured); } });
71 x.field.map(|value| plus_one(value + captured));
72 x.field.map(|value| { plus_one(value + captured) });
73 x.field.map(|value| { let y = plus_one(value + captured); });
75 x.field.map(|value| { plus_one(value + captured); });
77 x.field.map(|value| { { plus_one(value + captured); } });
80 x.field.map(|ref value| { do_nothing(value + captured) });
82 option().map(do_nothing);}