How to parse only top module

[DarioT9]

I have a SV file that references external packages and modules.
Is there a way to parse only the input file while ignoring unknown packages/types?

I'm using:
slang testframe.sv --ast-json testframe.json --ignore-unknown-modules

But I get:

testframe.sv:126:18: error: unknown class or package 'ibex_pkg'
        .RegFile(ibex_pkg::RegFileFPGA),

--ignore-unknown-modules works for module instantiations, but not for package references.

I'm looking for a generic CLI option that allows parsing any SV file without needing to know its dependencies upfront. Something like --ignore-unknown-packages or --ignore-unresolved-types.

[MikePopoloski]

If you just want parsing you can do --parse-only. That does not do elaboration, including name resolution, type checking, semantic analysis, etc.

[DarioT9]

I tried doing:
slang testframe.sv --parse-only --ast-json testframe.json, but it won't produce any json file.

[MikePopoloski]

You can't create an AST (and therefore can't output such an AST) without doing name resolution and type checking. You could do --cst-json instead to get the concrete syntax tree, which is the output of parsing.

[DarioT9]

Since I need the AST I am gonna need to include all the packages, right? And I have to do it both when using and not using --parse-only?

[MikePopoloski]

If you are only parsing then you don't need packages. Parsing doesn't do name resolution. If you want a full AST then you need to provide all definitions.

[DarioT9]

Okok thank you so much