Did you know ... Search Documentation:
PL_new_functor()
Availability:C-language interface function
functor_t PL_new_functor(atom_t name, int arity)
Returns a functor identifier, a handle for the name/arity pair. The returned handle is valid for the entire Prolog session. Future versions may garbage collect functors as part of atom garbage collection. Currently aborts the process with a fatal error on failure. Future versions may raise a resource exception and return (atom_t)0.
Tags are associated to your profile if you are logged in
Tags:
LogicalCaptain said (2021-04-18T13:56:20):0 upvotes 0 0 downvotes
Picture of user LogicalCaptain.

There is also

PL_EXPORT(functor_t) PL_new_functor_sz(atom_t f, size_t a);

which remains undocumented.

Probably the same, just using size_t as type of arity (which seems better)?

In which module is this functor registered?