[petsc-dev] FFI-wrapping PETSc structs that contain macros

Jed Brown jed at jedbrown.org
Thu May 14 15:26:50 CDT 2015

Marco Zocca <zocca.marco at gmail.com> writes:

> Dear all,
> I am trying to write a petsc foreign-function wrapper for a different language.
> What I don't understand at the moment is the role of macros in setting
> up structs. For example, in the implementation of Vec summarised
> below, when and how is PETSCHEADER expanded?

It's expanded by the C Preprocessor.  But why are you looking at this?
Those are private headers not even available to C callers.  Why do you
feel compelled to access these from a different language?
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