Enums like this one are treated as bitfield like enums: enum FlagsLike
{B=2, C=4};
lldb recognises them as collections of flags, so you can have "B | C".
If there's any values not covered that's printed as hex "B | C | 0x1".
What happened if the value was 0 was we would not match any of the
enumerators, then the remainder check requires that the remainder is
non-zero. So lldb would print nothing at all.
Which I assume is a bug because knowing that no flags are set is useful,
just as much as knowing that some unkown bit was set to make it
non-zero.
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