Enum and restrictions

Hi,
Could anybody tell me what are the underlying reasons of not
letting clone enums (and what has got in common with special
handling of serialization I believe ...) ? I know that it would break
the singleton design pattern, but why is it so important ? What would
the risk be ? Any examples ?
Thanks,
Adrian

Performance, just performance. Note that enums don't have real value
semantics and that enums are a close friend of the compiler. If you'd
be able to clone() an enum, its equals() method would have to support
value semantics (slowing down the thing) and what would the benefit
be? Now the compiler can simply take an enum's 'ordinal' value,
generated by the compiler itself and use that simple int instead (for
switch statements etc.)
kind regards,
Jos

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