828bfb2c61
Code like this is fixed now:
```
fn foo(p: [u8, ..4]) {
match p {
[a, b, c, d] => {}
};
}
```
Invalid constructors are not reported as errors yet:
```
fn foo(p: [u8, ..4]) {
match p {
[_, _, _] => {} // this should be error
[_, _, _, _, _, .._] => {} // and this
_ => {}
}
}
```
Issue #8311 is partially fixed by this commit. Fixed-length arrays in
let statement are not yet allowed:
```
let [a, b, c] = [1, 2, 3]; // still fails
```
58 lines
1.2 KiB
Rust
58 lines
1.2 KiB
Rust
fn a() {
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let mut vec = ~[~1, ~2, ~3];
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match vec {
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[~ref _a] => {
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vec[0] = ~4; //~ ERROR cannot assign to `(*vec)[]` because it is borrowed
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}
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_ => fail!("foo")
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}
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}
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fn b() {
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let mut vec = ~[~1, ~2, ~3];
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match vec {
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[.._b] => {
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vec[0] = ~4; //~ ERROR cannot assign to `(*vec)[]` because it is borrowed
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}
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}
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}
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fn c() {
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let mut vec = ~[~1, ~2, ~3];
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match vec {
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[_a, .._b] => {
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//~^ ERROR cannot move out
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// Note: `_a` is *moved* here, but `b` is borrowing,
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// hence illegal.
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//
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// See comment in middle/borrowck/gather_loans/mod.rs
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// in the case covering these sorts of vectors.
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}
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_ => {}
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}
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let a = vec[0]; //~ ERROR use of partially moved value: `vec`
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}
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fn d() {
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let mut vec = ~[~1, ~2, ~3];
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match vec {
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[.._a, _b] => {
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//~^ ERROR cannot move out
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}
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_ => {}
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}
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let a = vec[0]; //~ ERROR use of partially moved value: `vec`
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}
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fn e() {
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let mut vec = ~[~1, ~2, ~3];
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match vec {
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[_a, _b, _c] => {}
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_ => {}
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}
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let a = vec[0]; //~ ERROR use of partially moved value: `vec`
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}
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fn main() {}
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