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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/borrowck/borrowck-slice-pattern-element-loan-slice-no-overlap.rs | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-slice-pattern-element-loan-slice-no-overlap.rs b/src/test/ui/borrowck/borrowck-slice-pattern-element-loan-slice-no-overlap.rs new file mode 100644 index 000000000..6390dc3a9 --- /dev/null +++ b/src/test/ui/borrowck/borrowck-slice-pattern-element-loan-slice-no-overlap.rs @@ -0,0 +1,59 @@ +// check-pass + +fn nop(_s: &[& i32]) {} +fn nop_subslice(_s: &[i32]) {} + +fn const_index_ok(s: &mut [i32]) { + if let [ref first, ref second, _, ref fourth, ..] = *s { + if let [_, _, ref mut third, ..] = *s { + nop(&[first, second, third, fourth]); + } + } +} + +fn const_index_from_end_ok(s: &mut [i32]) { + if let [.., ref fourth, ref third, _, ref first] = *s { + if let [.., ref mut second, _] = *s { + nop(&[first, second, third, fourth]); + } + } +} + +fn const_index_mixed(s: &mut [i32]) { + if let [.., _, ref from_end4, ref from_end3, _, ref from_end1] = *s { + if let [ref mut from_begin0, ..] = *s { + nop(&[from_begin0, from_end1, from_end3, from_end4]); + } + } + if let [ref from_begin0, ref from_begin1, _, ref from_begin3, _, ..] = *s { + if let [.., ref mut from_end1] = *s { + nop(&[from_begin0, from_begin1, from_begin3, from_end1]); + } + } +} + +fn const_index_and_subslice_ok(s: &mut [i32]) { + if let [ref first, ref second, ..] = *s { + if let [_, _, ref mut tail @ ..] = *s { + nop(&[first, second]); + nop_subslice(tail); + } + } +} + +fn const_index_and_subslice_from_end_ok(s: &mut [i32]) { + if let [.., ref second, ref first] = *s { + if let [ref mut tail @ .., _, _] = *s { + nop(&[first, second]); + nop_subslice(tail); + } + } +} + +fn main() { + let mut v = [1,2,3,4]; + const_index_ok(&mut v); + const_index_from_end_ok(&mut v); + const_index_and_subslice_ok(&mut v); + const_index_and_subslice_from_end_ok(&mut v); +} |