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.
#![allow(unused)]
fn main() {
enum Enum {
WithField(i32)
}
use Enum::*;
match WithField(1) {
WithField => {}
}
}
ⓘ
Match bindings cannot shadow statics:
#![allow(unused)]
fn main() {
static TEST: i32 = 0;
let r = 123;
match r {
TEST => {}
}
}
ⓘ
Fixed examples:
#![allow(unused)]
fn main() {
static TEST: i32 = 0;
let r = 123;
match r {
some_value => {}
}
}
or
#![allow(unused)]
fn main() {
const TEST: i32 = 0;
let r = 123;
match r {
TEST => {}
other_values => {}
}
}