This was an experiment that never properly took off and was never
used by any generator. Its use was highly variable, so it could
not be relied upon. We will still want to reverse the current
behavior eventually (no null by default), but that will be
done with eo file versioning in the future.
@feature
Now all error/unknown/etc values returned from APIs are zero,
previously it was a mix of zeroes and minus ones. Also, some
enums that had no error/invalid value before have one now, which
allows for better distinction between what is an error and what
is an intended result.
This adds new APIs that deal with the new documentation syntax
provided by Eolian. The old doc comment APIs are considered
deprecated from now on and will be removed.
@feature