Error code E0665
Note: this error code is no longer emitted by the compiler.
The Default
trait was derived on an enum.
Erroneous code example:
ⓘ
The Default
cannot be derived on an enum for the simple reason that the
compiler doesn't know which value to pick by default whereas it can for a
struct as long as all its fields implement the Default
trait as well.
If you still want to implement Default
on your enum, you'll have to do it "by
hand":