Function libsqlite3_sys::sqlite3_create_function_v2

pub unsafe extern fn sqlite3_create_function_v2(db: *mut sqlite3,
                                                zFunctionName: *const c_char,
                                                nArg: c_int,
                                                eTextRep: c_int,
                                                pApp: *mut c_void,
                                                xFunc: Option<unsafe extern fn(_: *mut sqlite3_context, _: c_int, _: *mut *mut sqlite3_value)>,
                                                xStep: Option<unsafe extern fn(_: *mut sqlite3_context, _: c_int, _: *mut *mut sqlite3_value)>,
                                                xFinal: Option<unsafe extern fn(_: *mut sqlite3_context)>,
                                                xDestroy: Option<unsafe extern fn(_: *mut c_void)>)
                                                -> c_int