3 fn nop(_s: &[& i32]) {}
4 fn nop_subslice(_s: &[i32]) {}
6 fn const_index_ok(s: &mut [i32]) {
7 if let [ref first, ref second, _, ref fourth, ..] = *s {
8 if let [_, _, ref mut third, ..] = *s {
9 nop(&[first, second, third, fourth]);
14 fn const_index_from_end_ok(s: &mut [i32]) {
15 if let [.., ref fourth, ref third, _, ref first] = *s {
16 if let [.., ref mut second, _] = *s {
17 nop(&[first, second, third, fourth]);
22 fn const_index_mixed(s: &mut [i32]) {
23 if let [.., _, ref from_end4, ref from_end3, _, ref from_end1] = *s {
24 if let [ref mut from_begin0, ..] = *s {
25 nop(&[from_begin0, from_end1, from_end3, from_end4]);
28 if let [ref from_begin0, ref from_begin1, _, ref from_begin3, _, ..] = *s {
29 if let [.., ref mut from_end1] = *s {
30 nop(&[from_begin0, from_begin1, from_begin3, from_end1]);
35 fn const_index_and_subslice_ok(s: &mut [i32]) {
36 if let [ref first, ref second, ..] = *s {
37 if let [_, _, ref mut tail @ ..] = *s {
38 nop(&[first, second]);
44 fn const_index_and_subslice_from_end_ok(s: &mut [i32]) {
45 if let [.., ref second, ref first] = *s {
46 if let [ref mut tail @ .., _, _] = *s {
47 nop(&[first, second]);
54 let mut v = [1,2,3,4];
55 const_index_ok(&mut v);
56 const_index_from_end_ok(&mut v);
57 const_index_and_subslice_ok(&mut v);
58 const_index_and_subslice_from_end_ok(&mut v);