[rustc.git] / src / librustc_error_codes / error_codes / E0416.md

An identifier is bound more than once in a pattern.

Erroneous code example:

```compile_fail,E0416
match (1, 2) {
    (x, x) => {} // error: identifier `x` is bound more than once in the
                 //        same pattern
}
```

Please verify you didn't misspell identifiers' name. Example:

```
match (1, 2) {
    (x, y) => {} // ok!
}
```

Or maybe did you mean to unify? Consider using a guard:

```
# let (A, B, C) = (1, 2, 3);
match (A, B, C) {
    (x, x2, see) if x == x2 => { /* A and B are equal, do one thing */ }
    (y, z, see) => { /* A and B unequal; do another thing */ }
}
```
Commit	Line	Data
60c5eb7d XL	1	An identifier is bound more than once in a pattern.
	2
	3	Erroneous code example:
	4
	5	```compile_fail,E0416
	6	match (1, 2) {
	7	(x, x) => {} // error: identifier `x` is bound more than once in the
	8	// same pattern
	9	}
	10	```
	11
	12	Please verify you didn't misspell identifiers' name. Example:
	13
	14	```
	15	match (1, 2) {
	16	(x, y) => {} // ok!
	17	}
	18	```
	19
	20	Or maybe did you mean to unify? Consider using a guard:
	21
	22	```
	23	# let (A, B, C) = (1, 2, 3);
	24	match (A, B, C) {
	25	(x, x2, see) if x == x2 => { /* A and B are equal, do one thing */ }
	26	(y, z, see) => { /* A and B unequal; do another thing */ }
	27	}
	28	```