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1 fn test_fn_mut_arg_of_array() {
2     mut a := App{}
3     a.data << 1
4     a.do_something()
5     assert a.data.len == 2
6 }
7 
8 struct App {
9 pub mut:
10     data []int
11 }
12 
13 fn (mut a App) do_something() {
14     assert a.data.len == 1
15     mut p := Proc{}
16     p.make_a(mut a.data)
17     assert a.data.len == 2
18 }
19 
20 struct Proc {}
21 
22 fn (mut p Proc) make_a(mut data []int) {
23     data << 2
24 }
25

1	fn test_fn_mut_arg_of_array() {
2	mut a := App{}
3	a.data << 1
4	a.do_something()
5	assert a.data.len == 2
6	}
7
8	struct App {
9	pub mut:
10	data []int
11	}
12
13	fn (mut a App) do_something() {
14	assert a.data.len == 1
15	mut p := Proc{}
16	p.make_a(mut a.data)
17	assert a.data.len == 2
18	}
19
20	struct Proc {}
21
22	fn (mut p Proc) make_a(mut data []int) {
23	data << 2
24	}
25