sym_ston
int sym_ston(const struct res_sym *, const char *, int *);
result = sym_ston(__p_class_syms, buf, &success);
result = sym_ston(__p_type_syms, buf, &success);
__weak_reference(__sym_ston, sym_ston);
sig_type = sym_ston(__p_type_syms, buf2, &success);
nxt_type = sym_ston(__p_type_syms, buf2,