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|
A binding shadowed something it shouldn't.
A match arm or a variable has a name that is already used by
something else, e.g.
* struct name
* enum variant
* static
* associated constant
This error may also happen when an enum variant *with fields* is used
in a pattern, but without its fields.
```compile_fail
enum Enum {
WithField(i32)
}
use Enum::*;
match WithField(1) {
WithField => {} // error: missing (_)
}
```
Match bindings cannot shadow statics:
```compile_fail,E0530
static TEST: i32 = 0;
let r = 123;
match r {
TEST => {} // error: name of a static
}
```
Fixed examples:
```
static TEST: i32 = 0;
let r = 123;
match r {
some_value => {} // ok!
}
```
or
```
const TEST: i32 = 0; // const, not static
let r = 123;
match r {
TEST => {} // const is ok!
other_values => {}
}
```
|
