Hello all. I'm making an external in C that needs to accept a list as its input. I am having a tough time both declaring the list in my struct definition, and instantiating the inlet itself that accepts a list.

Could anyone please show me the syntax to declare the list and the method for the inlet?

@SystemaComplicado A complete guess..... inlet.zip that its in there somewhere.. (no guarantees..... its way beyond me).
David.

For the public methods, see m_pd.h in Pd's source code:

For adding a list method:

EXTERN void class_addlist(t_class *c, t_method fn);

Because of gpointers, storing a list of arbitrary atoms is non-trivial. (See x_list.c for how it's done internally.) If you want to store a list of floats, however, I'd imagine you could probably store it as a binbuf in the struct and use binbuf_duplicate.