PyPySide: Replace type patching, but not by heaptype, 2-5(5)

PyPy does not allow patching of non-heaptypes. We did that
trick for simplicity in the signature module where we created
a `__signature__` attribute for types.

Type patching of `PyType_Type` needed a few things, only, because
our types are already heaptypes.

The plan was originally to also replace the type patching of

    * PyMethodDescr_Type
    * PyCFunction_Type
    * PyStaticMethod_Type
    * PyWrapperDescr_Type

Actually, it is much easier to stop touching these types at all.
Instead, we use the `get_signature` function in all test cases.

[ChangeLog][shiboken6] Type patching of builtin types is not possible
in PyPy. We use the `get_signature` function, instead for now.

Task-number: PYSIDE-535
Change-Id: I0cb892872a3497ac1fcc67c913d05ba42d75014d
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 2 insertions, 0 deletions

diff --git a/sources/shiboken6/libshiboken/signature/signature_extend.cpp b/sources/shiboken6/libshiboken/signature/signature_extend.cpp
index b60b20b7a..298f31b55 100644
--- a/sources/shiboken6/libshiboken/signature/signature_extend.cpp
+++ b/sources/shiboken6/libshiboken/signature/signature_extend.cpp
@@ -223,6 +223,8 @@ static int pyside_set___signature__(PyObject *op, PyObject *value)
     return ret;
 }
 
+// PYSIDE-535: We cannot patch types easily in PyPy.
+//             Let's use the `get_signature` function, instead.
 static PyGetSetDef new_PyCFunction_getsets[] = {
     {const_cast<char *>("__doc__"),       reinterpret_cast<getter>(pyside_cf_get___doc__),
                                           nullptr, nullptr, nullptr},