[issue33012] Invalid function cast warnings with gcc 8 for METH_NOARGS

[Xavier de Gaye]

Xavier de Gaye <xdegaye at gmail.com> added the comment:

> But the problem is that additional flags can be used, e.g. METH_CLASS.

Right, https://docs.python.org/3/c-api/structures.html says: "The individual flags indicate either a calling convention or a binding convention". This may be overcome by introducing another macro with 2 arguments, the second argument being used to set the binding convention flag:

#define SET_METH_VARARGS_KEYWORDS_FLAG(func, flag) \
    (PyCFunction)(void *)(PyCFunctionWithKeywords)func, METH_VARARGS|METH_KEYWORDS|flag
#define SET_METH_VARARGS_KEYWORDS(func) SET_METH_VARARGS_KEYWORDS_FLAG(func, 0x0000)

The refactoring would be quite large though.

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<https://bugs.python.org/issue33012>
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