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//compile-flags: -Z borrowck=mir
#![feature(slice_patterns)]
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_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_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_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_begin0, ..] = *s {
nop(&[from_begin0, from_end1, from_end3, from_end4]);
}
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_end1] = *s {
nop(&[from_begin0, from_begin1, from_begin3, from_end1]);
}
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_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_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_ok(s: &mut [i32]) {
if let [.., ref second, ref first] = *s {
if let [ref mut tail.., _, _] = *s {
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_ok(&mut v);
const_index_err(&mut v);
const_index_from_end_ok(&mut v);
const_index_from_end_err(&mut v);
const_index_and_subslice_ok(&mut v);
const_index_and_subslice_err(&mut v);
const_index_and_subslice_from_end_ok(&mut v);
const_index_and_subslice_from_end_err(&mut v);
subslices(&mut v);
}
|
