Availability:C-language interface function
bool PL_get_atom_chars(term_t 
+t, char **s)If t is an atom, store a pointer to a 0-terminated C-string 
in
s. It is explicitly not allowed to modify 
the contents of this string. Some built-in atoms may have the string 
allocated in read-only memory, so‘temporary manipulation’can 
cause an error.