File - medvednikov/v2


1 struct Tree {
2 mut:
3     garbage int
4     parent  ?&Tree
5 }
6 
7 fn main() {
8     // `parent` is not declared as mutable!
9     parent := Tree{
10         garbage: 11
11     }
12     // taking a reference of `parent` and putting it under a `mut:` struct field
13     mut child := Tree{
14         parent: &parent
15     }
16 
17     // unwrap the reference of `parent`, but declare it as `mut`
18     mut inner_parent := child.parent?
19     inner_parent.garbage = 777 // !we can mutate `parent` freely!
20     println(parent.garbage) // 777
21 }
22

1	struct Tree {
2	mut:
3	garbage int
4	parent ?&Tree
5	}
6
7	fn main() {
8	// `parent` is not declared as mutable!
9	parent := Tree{
10	garbage: 11
11	}
12	// taking a reference of `parent` and putting it under a `mut:` struct field
13	mut child := Tree{
14	parent: &parent
15	}
16
17	// unwrap the reference of `parent`, but declare it as `mut`
18	mut inner_parent := child.parent?
19	inner_parent.garbage = 777 // !we can mutate `parent` freely!
20	println(parent.garbage) // 777
21	}
22