\fBint set_fieldtype_arg(\fP
\fBFIELDTYPE *\fIfieldtype\fB,\fR
\fBvoid *(* const \fImake_arg\fB)(va_list *),\fR
\fBvoid *(* const \fIcopy_arg\fB)(const void *),\fR
\fBvoid (* const \fIfree_arg\fB)(void *));\fR
\fBint set_fieldtype_arg(\fP
\fBFIELDTYPE *\fIfieldtype\fB,\fR
\fBvoid *(* const \fImake_arg\fB)(va_list *),\fR
\fBvoid *(* const \fIcopy_arg\fB)(const void *),\fR
\fBvoid (* const \fIfree_arg\fB)(void *));\fR