HACKING.txt

function namespaces:

Functions are into several namespaces from lower-level to higher-level:

- `tpd_*` : tinypy data structures;

- `tp_*` : tinypy interpreter C-API;
           arguments from C arguments;
           functions may return any C value;
           return values are usually tracked by gc,
           unless the name indicates untracked (ending with _nt)
           add the result to gc before dropping to the Python land.

- `tpy_*` : python language C-API
            arguments from local scope parameter list
            functions always return tp_obj;
            return values are usually tracked by gc if it should,
            unless the name indicates untracked.