The force_align attribute is allowed on enums, but does nothing [all languages]

[TethysSvensson]

This schema is accepted by flatc:

enum Foo: uint8 (force_align: 4) { X, Y, Z }

However it generates the same code as the following schema:

enum Foo: uint8 { X, Y, Z }

I think this should work the same as force_align on structs. Alternatively it could be rejected by flatc.

I have validated that the bug is present in versions 2.0.0, 2.0.7 and the current master.

[dbaileychess]

May I ask why you would want to force align an enum to something other than the backing type alignment?

I'm leaning to rejecting if by flatc instead of allowing it.

[TethysSvensson]

I don't think I see a good reason for it.

However I am not a good authority on whether it's useful, since I don't think having alignment in the language is something that is beneficial.

[dbaileychess]

Sure, then why are you adding the force_align attribute?

Thanks for the report, I'll see about forbidding from being applied to enums.

[TethysSvensson]

We are aiming for planus to have as much feature parity with flatc as possible.

Also, since that flatbuffers does have alignment built-in to the language, using force_align is a good way for me to test the correctness of the alignment code in planus.

[dbaileychess]

SG. Since adding the attribute seems to have no negative effect, this will have slightly lower priority to fix.