Can I check if a value is convertible to a valid value of an enum?

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On Friday, 25 September 2015 at 03:20:24 UTC, Nicholas Wilson 
wrote:
> find + EnumMembers should do the trick
> if ( (EnumMembers!SomeType).canFind(value))
> {
>     // ...
> }

Should be

if (only(EnumMembers!SomeType).canFind(value))
{
     //...
}