IDL without Namespace generates nils.

[stellarpower]

Hi,

Brand new to FlatBuffers, but looking forward to giving this a whirl as last time I tried protocol buffers IIRC they weren't the most straightforward.

I used a toy example from online and compiled it to binary format as per the readme:

enum Color:byte { Red = 0, Green, Blue = 2 } // Comment and uncomment
union Equipment { Weapon }                   //

table Vector {
  x:float;
  y:float;
  z:float;
}
root_type Vector;

Without any unions or enums, it causes rbflatc to crash

/usr/lib64/ruby/gems/3.4.0/gems/red-flatbuffers-0.0.3/lib/flatbuffers/command/rbflatc.rb:32: warning: IO::Buffer is experimental and both the Ruby and C interface may change in the future!
/usr/lib64/ruby/gems/3.4.0/gems/red-flatbuffers-0.0.3/lib/flatbuffers/generator.rb:194:in 'FlatBuffers::Generator#generate_enums': undefined method 'each' for nil (NoMethodError)

      @schema.enums.each do |enum|

I assume this is valid IDL(?), the main flatc compiler is happy with it, so, guessing might be a test case for either supporting or if not, producing a cleanish error.

I had a quick peek and @Schema.@objects (or something like that) was also nil, so would hazard a guess the binary format hasn't emitted a section that wasn't needed and thus it's been misparsed. But that is just a guess.

Thanks!

version: rbflatc 0.0.3

[hiroyuki-sato]

Hello, @stellarpower

I'm unfamiliar flatbuffers too.

It seems work fine. Could you write reproduce step the problem?

enum Color:byte { Red = 0, Green, Blue = 2 } // Comment and uncomment
union Equipment { Weapon }                   //

table Vector {
  x:float;
  y:float;
  z:float;
}

flatc -o out --binary --schema --bfbs-builtins --bfbs-comments test.fbs

error:
  /private/tmp/test.fbs:11: 0: error: type referenced but not defined (check namespace): Weapon, originally at: test.fbs:2

I commented union part.

enum Color:byte { Red = 0, Green, Blue = 2 } // Comment and uncomment
//union Equipment { Weapon }                   // <-- commented here

table Vector {
  x:float;
  y:float;
  z:float;
}
root_type Vector;

rbflatc --version
rbflatc 0.0.3
flatc -o out --binary --schema --bfbs-builtins --bfbs-comments test.fbs
rbflatc --output-dir hoge --outer-namespaces Toy t/test.bfbs

rbflatc generates two files.

ls -1 hoge/
color.rb
vector.rb