Availability:C-language interface function
const pl_wchar_t* PL_atom_wchars(atom_t
atom, size_t *len)Extract characters from a wide-character atom. Succeeds on any atom
marked as‘text’. If the underlying atom is a wide-character
atom, the returned pointer is a pointer into the atom structure. If the
atom is represented as an ISO-Latin-1 string, the returned pointer comes
from Prolog's‘buffer stack’(see section
12.4.14).