GCCJIT dynamic down casting (GCC16 or future GCC17)

Hello all,

I do have (and even compiled it from source code a few days ago) GCC 16
with libgccjit enabled (this on Linux/x86-64).

gcc-16 (Debian 16-20260425-1) 16.0.1 20260425 (prerelease) [gcc-16 r16-
8812-gd9c07462a22]

https://gcc.gnu.org/onlinedocs/jit/topics/objects.html
mentions upcasting 
> casting methods for upcasting from subclasses to parent classes

But is there any dynamic downcasting (or way to dynamically query the
GCCJIT "class" of any gcc_jit_object pointer)?

E.g. suppose I have some gcc_jit_object* jp pointer.

How can I know if jp is representing a struct, a left value, a field, a
parameter, a number constant etc....




I am serializing GCCJIT representation to JSON in my open source
RefPerSys software, its commit 94d149cbaa71 

Thanks for your insights

-- 

Basile STARYNKEVITCH                           
<[email protected]>
8 rue de la Faïencerie                      
http://starynkevitch.net/Basile/  
92340 Bourg-la-Reine                        
https://github.com/bstarynk
France                               
https://github.com/RefPerSys/RefPerSys
                  https://orcid.org/0000-0003-0908-5250