mirror of https://github.com/rust-lang/rust
80 lines
2.4 KiB
Rust
80 lines
2.4 KiB
Rust
fn nop(_s: &[& i32]) {}
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fn nop_subslice(_s: &[i32]) {}
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fn const_index_err(s: &mut [i32]) {
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if let [ref first, ref second, ..] = *s {
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if let [_, ref mut second2, ref mut third, ..] = *s { //~ERROR
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nop(&[first, second, second2, third]);
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}
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}
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}
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fn const_index_from_end_err(s: &mut [i32]) {
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if let [.., ref fourth, ref third, _, ref first] = *s {
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if let [.., ref mut third2, _, _] = *s { //~ERROR
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nop(&[first, third, third2, fourth]);
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}
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}
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}
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fn const_index_mixed(s: &mut [i32]) {
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if let [.., _, ref from_end4, ref from_end3, _, ref from_end1] = *s {
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if let [_, ref mut from_begin1, ..] = *s { //~ERROR
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nop(&[from_begin1, from_end1, from_end3, from_end4]);
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}
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if let [_, _, ref mut from_begin2, ..] = *s { //~ERROR
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nop(&[from_begin2, from_end1, from_end3, from_end4]);
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}
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if let [_, _, _, ref mut from_begin3, ..] = *s { //~ERROR
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nop(&[from_begin3, from_end1, from_end3, from_end4]);
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}
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}
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if let [ref from_begin0, ref from_begin1, _, ref from_begin3, _, ..] = *s {
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if let [.., ref mut from_end2, _] = *s { //~ERROR
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nop(&[from_begin0, from_begin1, from_begin3, from_end2]);
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}
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if let [.., ref mut from_end3, _, _] = *s { //~ERROR
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nop(&[from_begin0, from_begin1, from_begin3, from_end3]);
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}
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if let [.., ref mut from_end4, _, _, _] = *s { //~ERROR
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nop(&[from_begin0, from_begin1, from_begin3, from_end4]);
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}
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}
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}
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fn const_index_and_subslice_err(s: &mut [i32]) {
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if let [ref first, ref second, ..] = *s {
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if let [_, ref mut tail @ ..] = *s { //~ERROR
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nop(&[first, second]);
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nop_subslice(tail);
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}
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}
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}
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fn const_index_and_subslice_from_end_err(s: &mut [i32]) {
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if let [.., ref second, ref first] = *s {
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if let [ref mut tail @ .., _] = *s { //~ERROR
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nop(&[first, second]);
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nop_subslice(tail);
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}
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}
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}
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fn subslices(s: &mut [i32]) {
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if let [_, _, _, ref s1 @ ..] = *s {
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if let [ref mut s2 @ .., _, _, _] = *s { //~ERROR
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nop_subslice(s1);
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nop_subslice(s2);
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}
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}
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}
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fn main() {
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let mut v = [1,2,3,4];
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const_index_err(&mut v);
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const_index_from_end_err(&mut v);
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const_index_and_subslice_err(&mut v);
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const_index_and_subslice_from_end_err(&mut v);
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subslices(&mut v);
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}
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