Rob Hoes writes ("[PATCH RFC 2/9] libxl idl: allow implicit enum values"):
> Introducing two special enum values:
> * ENUM_NEXT: equal to the previous value in the enum plus 1
> * ENUM_PREV: equal to the previous value in the enum minus 1
>
> This makes it a little easier to maintain enums for which we do not care too
> much about the exact enum values.
It means that enum values can't be looked up without compiling the
code. It also means that deleting an old enum value would result in
unexpected and undesirable changes to subsequent enums.
So I'm afraid I don't agree with this approach.
Thanks,
Ian.
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