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An array without a fixed length was pattern-matched.
Erroneous code example:
```compile_fail,E0730
fn is_123<const N: usize>(x: [u32; N]) -> bool {
match x {
[1, 2, ..] => true, // error: cannot pattern-match on an
// array without a fixed length
_ => false
}
}
```
To fix this error, you have two solutions:
1. Use an array with a fixed length.
2. Use a slice.
Example with an array with a fixed length:
```
fn is_123(x: [u32; 3]) -> bool { // We use an array with a fixed size
match x {
[1, 2, ..] => true, // ok!
_ => false
}
}
```
Example with a slice:
```
fn is_123(x: &[u32]) -> bool { // We use a slice
match x {
[1, 2, ..] => true, // ok!
_ => false
}
}
```
|
