Include definitions from other files

[iilyak]

Some of my structures are re-used in multiple places. Also I don't want to put dozens of structures into one giant file. I would prefer to have one file per packet. However currently I don't see a way to refer to packet defined in another file. Of cause the parser fails with "undeclared typedef identifier ...".

[hchataing]

Can you share an example of what you would like to achieve with PDL ?

We are not planning on implementing a module system for PDL right now, as it generates difficulties down the line for resolving import paths. Right now the generator does not know about the output path for the generated module, nor would it know about the location of modules to import external definitions from.

As a first measure, we could facilitate the creation of large modules with shared definitions by adding an embed statement to copy the definitions from one file to another, and remove duplicates. Would that be enough for your use case ?

[gbonnefille]

I have a same issue. I'm trying to use PDL to handle CCSDS packets. The CCSDS specifies the Space Packet Protocol: https://ccsds.org/Pubs/133x0b1s.pdf

One way to read this specification is to have a whole generic part, including a more specialized part: Secondary Header and User Data.

I imagine to have one PDL file describing the generic part and one PDL file per packets I have to decode. The later need to embed/include/inherit the generic part.

Is there any other way to do this?