warning: missing field 'tp_version_tag' initializer [-Wmissing-field-initializers]

從 include/boost/python/opaque_pointer_converter.hpp 中的 opaque::type_object initializer 開始，並將其欄位與 Python 3.11 的 cpython/object.h 進行比較。使用 Clang 和列出的 warning flags 重現該警告，然後確認該 initializer 不再發出 missing-field-initializers 警告。

Hi,

using Clang 14/15/16 (-Wall -Wpedantic -Wextra) with Boost 1.81.0 and Python 3.11, I get the following warning at

In file included from /my/project/Source.hpp:xx:
In file included from /path/to/boost/1.81.0/include/boost/python.hpp:48:
/path/to/boost/1.81.0/include/boost/python/opaque_pointer_converter.hpp:169:1: warning: missing field 'tp_version_tag' initializer [-Wmissing-field-initializers]

Having a closer look, it seems that when defining a PyTypeObject, at .../include/boost/python/opaque_pointer_converter.hpp, the code isn't considering the last few data members:

// from .../include/python3.11/cpython/object.h
...
struct _typeobject {
...
    PyObject *tp_weaklist;
    destructor tp_del;

    /* Type attribute cache version tag. Added in version 2.6 */
    unsigned int tp_version_tag;

    destructor tp_finalize;
    vectorcallfunc tp_vectorcall;
};
...

// from .../include/boost/python/opaque_pointer_converter.hpp
...
template <class Pointee>
PyTypeObject opaque<Pointee>::type_object =
{
    ...
    0,          /* tp_weaklist */
#if PYTHON_API_VERSION >= 1012
    0           /* tp_del */
#endif
};
...