3 fn nop(_s: &[& i32]) {}
4 fn nop_subslice(_s: &[i32]) {}
6 fn const_index_ok(s: &mut [i32; 4]) {
7 let [ref first, ref second, _, ref fourth, ..] = *s;
8 let [_, _, ref mut third, ..] = *s;
9 nop(&[first, second, third, fourth]);
12 fn const_index_from_end_ok(s: &mut [i32; 4]) {
13 let [.., ref fourth, ref third, _, ref first] = *s;
14 let [.., ref mut second, _] = *s;
15 nop(&[first, second, third, fourth]);
18 fn const_index_mixed(s: &mut [i32; 6]) {
19 let [.., _, ref from_end4, ref from_end3, _, ref from_end1] = *s;
21 let [ref mut from_begin0, ..] = *s;
22 nop(&[from_begin0, from_end1, from_end3, from_end4]);
23 let [_, ref mut from_begin1, ..] = *s;
24 nop(&[from_begin1, from_end1, from_end3, from_end4]);
26 let [ref from_begin0, ref from_begin1, _, ref from_begin3, _, ..] = *s;
28 let [.., ref mut from_end1] = *s;
29 nop(&[from_begin0, from_begin1, from_begin3, from_end1]);
30 let [.., ref mut from_end2, _] = *s;
31 nop(&[from_begin0, from_begin1, from_begin3, from_end2]);
32 let [.., ref mut from_end4, _, _, _] = *s;
33 nop(&[from_begin0, from_begin1, from_begin3, from_end4]);
36 fn const_index_and_subslice_ok(s: &mut [i32; 4]) {
37 let [ref first, ref second, ..] = *s;
38 let [_, _, ref mut tail @ ..] = *s;
39 nop(&[first, second]);
43 fn const_index_and_subslice_from_end_ok(s: &mut [i32; 4]) {
44 let [.., ref second, ref first] = *s;
45 let [ref mut tail @ .., _, _] = *s;
46 nop(&[first, second]);
50 fn subslices(s: &mut [i32; 4]) {
51 let [_, _, ref s1 @ ..] = *s;
52 let [ref mut s2 @ .., _, _] = *s;
58 let mut v = [1,2,3,4];
59 const_index_ok(&mut v);
60 const_index_from_end_ok(&mut v);
61 const_index_and_subslice_ok(&mut v);
62 const_index_and_subslice_from_end_ok(&mut v);