src/librustc_error_codes/error_codes/E0416.md

   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 ```