diff options
Diffstat (limited to 'tests/ui/borrowck/borrowck-slice-pattern-element-loan-slice.rs')
-rw-r--r-- | tests/ui/borrowck/borrowck-slice-pattern-element-loan-slice.rs | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/tests/ui/borrowck/borrowck-slice-pattern-element-loan-slice.rs b/tests/ui/borrowck/borrowck-slice-pattern-element-loan-slice.rs new file mode 100644 index 000000000..0e1c90a1c --- /dev/null +++ b/tests/ui/borrowck/borrowck-slice-pattern-element-loan-slice.rs @@ -0,0 +1,79 @@ +fn nop(_s: &[& i32]) {} +fn nop_subslice(_s: &[i32]) {} + +fn const_index_err(s: &mut [i32]) { + if let [ref first, ref second, ..] = *s { + if let [_, ref mut second2, ref mut third, ..] = *s { //~ERROR + nop(&[first, second, second2, third]); + } + } +} + +fn const_index_from_end_err(s: &mut [i32]) { + if let [.., ref fourth, ref third, _, ref first] = *s { + if let [.., ref mut third2, _, _] = *s { //~ERROR + nop(&[first, third, third2, 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_begin1, ..] = *s { //~ERROR + nop(&[from_begin1, from_end1, from_end3, from_end4]); + } + if let [_, _, ref mut from_begin2, ..] = *s { //~ERROR + nop(&[from_begin2, from_end1, from_end3, from_end4]); + } + if let [_, _, _, ref mut from_begin3, ..] = *s { //~ERROR + nop(&[from_begin3, from_end1, from_end3, from_end4]); + } + } + if let [ref from_begin0, ref from_begin1, _, ref from_begin3, _, ..] = *s { + if let [.., ref mut from_end2, _] = *s { //~ERROR + nop(&[from_begin0, from_begin1, from_begin3, from_end2]); + } + if let [.., ref mut from_end3, _, _] = *s { //~ERROR + nop(&[from_begin0, from_begin1, from_begin3, from_end3]); + } + if let [.., ref mut from_end4, _, _, _] = *s { //~ERROR + nop(&[from_begin0, from_begin1, from_begin3, from_end4]); + } + } +} + +fn const_index_and_subslice_err(s: &mut [i32]) { + if let [ref first, ref second, ..] = *s { + if let [_, ref mut tail @ ..] = *s { //~ERROR + nop(&[first, second]); + nop_subslice(tail); + } + } +} + +fn const_index_and_subslice_from_end_err(s: &mut [i32]) { + if let [.., ref second, ref first] = *s { + if let [ref mut tail @ .., _] = *s { //~ERROR + nop(&[first, second]); + nop_subslice(tail); + } + } +} + +fn subslices(s: &mut [i32]) { + if let [_, _, _, ref s1 @ ..] = *s { + if let [ref mut s2 @ .., _, _, _] = *s { //~ERROR + nop_subslice(s1); + nop_subslice(s2); + } + } +} + +fn main() { + let mut v = [1,2,3,4]; + const_index_err(&mut v); + const_index_from_end_err(&mut v); + const_index_and_subslice_err(&mut v); + const_index_and_subslice_from_end_err(&mut v); + subslices(&mut v); +} |