compiler/rustc_error_codes/src/error_codes/E0370.md

   1 The maximum value of an enum was reached, so it cannot be automatically
   2 set in the next enum value.
   3
   4 Erroneous code example:
   5
   6 ```compile_fail,E0370
   7 #[repr(i64)]
   8 enum Foo {
   9     X = 0x7fffffffffffffff,
  10     Y, // error: enum discriminant overflowed on value after
  11        //        9223372036854775807: i64; set explicitly via
  12        //        Y = -9223372036854775808 if that is desired outcome
  13 }
  14 ```
  15
  16 To fix this, please set manually the next enum value or put the enum variant
  17 with the maximum value at the end of the enum. Examples:
  18
  19 ```
  20 #[repr(i64)]
  21 enum Foo {
  22     X = 0x7fffffffffffffff,
  23     Y = 0, // ok!
  24 }
  25 ```
  26
  27 Or:
  28
  29 ```
  30 #[repr(i64)]
  31 enum Foo {
  32     Y = 0, // ok!
  33     X = 0x7fffffffffffffff,
  34 }
  35 ```