Add the --no-minmax-values flag to prevent flatc from generating C++
enums with MIN and MAX enumerated values that otherwise would be set
to the inclusive lower and upper bound respectively of the enum.
This command-line flag is needed to avoid collisions when an enum that
is being ported to FlatBuffers already has a MIN or MAX enumerated
value.
It is also needed to work around a long-standing problem with
magic_enum that causes magic_enum to not see enumerated values that
are not unique. For example, if FlatBuffers sets MIN = FOO and MAX =
BAR, MIN and FOO share the same underlying value so they are not
unique. The same is true of MAX and BAR. This prevents magic_enum
from converting FOO and BAR to and from strings as well as causing
magic_enum to return a count of enumerated values that is two fewer
than it should be.
Co-authored-by: Paul Serice <paul@serice.net>
920f3827a0