1 #![feature(slice_patterns)]
3 fn nop(_s: &[& i32]) {}
4 fn nop_subslice(_s: &[i32]) {}
6 fn const_index_err(s: &mut [i32]) {
7 if let [ref first, ref second, ..] = *s {
8 if let [_, ref mut second2, ref mut third, ..] = *s { //~ERROR
9 nop(&[first, second, second2, third]);
14 fn const_index_from_end_err(s: &mut [i32]) {
15 if let [.., ref fourth, ref third, _, ref first] = *s {
16 if let [.., ref mut third2, _, _] = *s { //~ERROR
17 nop(&[first, third, third2, 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_begin1, ..] = *s { //~ERROR
25 nop(&[from_begin1, from_end1, from_end3, from_end4]);
27 if let [_, _, ref mut from_begin2, ..] = *s { //~ERROR
28 nop(&[from_begin2, from_end1, from_end3, from_end4]);
30 if let [_, _, _, ref mut from_begin3, ..] = *s { //~ERROR
31 nop(&[from_begin3, from_end1, from_end3, from_end4]);
34 if let [ref from_begin0, ref from_begin1, _, ref from_begin3, _, ..] = *s {
35 if let [.., ref mut from_end2, _] = *s { //~ERROR
36 nop(&[from_begin0, from_begin1, from_begin3, from_end2]);
38 if let [.., ref mut from_end3, _, _] = *s { //~ERROR
39 nop(&[from_begin0, from_begin1, from_begin3, from_end3]);
41 if let [.., ref mut from_end4, _, _, _] = *s { //~ERROR
42 nop(&[from_begin0, from_begin1, from_begin3, from_end4]);
47 fn const_index_and_subslice_err(s: &mut [i32]) {
48 if let [ref first, ref second, ..] = *s {
49 if let [_, ref mut tail @ ..] = *s { //~ERROR
50 nop(&[first, second]);
56 fn const_index_and_subslice_from_end_err(s: &mut [i32]) {
57 if let [.., ref second, ref first] = *s {
58 if let [ref mut tail @ .., _] = *s { //~ERROR
59 nop(&[first, second]);
65 fn subslices(s: &mut [i32]) {
66 if let [_, _, _, ref s1 @ ..] = *s {
67 if let [ref mut s2 @ .., _, _, _] = *s { //~ERROR
75 let mut v = [1,2,3,4];
76 const_index_err(&mut v);
77 const_index_from_end_err(&mut v);
78 const_index_and_subslice_err(&mut v);
79 const_index_and_subslice_from_end_err(&mut v);