Add QtCore.Slot.__signature__ and much more manually

The signature of QtCore.Slot and other classes could not automatically
be generated because the function is not generated by cppgenerator.cpp .
We add it manually in the C++ code into the generation process.

The case of QtCore.Slot had diverse follow-up issues to be solved:

- Classes which did not inherit from Shiboken were not generated.
  This is a long-standing omission and creates very many new
  simple types.

- The arity of Slot has default arguments after the varargs parameter
  "*types". This needed an extended Python parser analysis that fixes
  the arguments given to the inspect module, accordingly.

- The signature generation was completely new implemented and
  relies no longer on the restricted syntax of a Python (2) function
  but generates signatures directly as Parameter instances.

Implemented classes with hand-made signatures:

    QtCore.ClassInfo
    QtCore.MetaFunction,
    QtCore.MetaSignal
    QtCore.Property
    QtCore.Signal
    QtCore.SignalInstance
    QtCore.Slot
    QtQml.ListProperty
    QtQml.VolatileBool

As a side effect, many more subtypes were published.
Enums are done, which concludes this work.

Fixes: PYSIDE-945
Fixes: PYSIDE-1052
Change-Id: Ic09f02ece3a90325519e42e4e39719beb0c27ae9
Reviewed-by: Christian Tismer <tismer@stackless.com>

1 files changed, 8 insertions, 2 deletions

diff --git a/sources/pyside2/libpyside/pysidemetafunction.cpp b/sources/pyside2/libpyside/pysidemetafunction.cpp
index 346117201..e0e0c439b 100644
--- a/sources/pyside2/libpyside/pysidemetafunction.cpp
+++ b/sources/pyside2/libpyside/pysidemetafunction.cpp
@@ -41,6 +41,7 @@
 #include "pysidemetafunction_p.h"
 
 #include <shiboken.h>
+#include <signature.h>
 
 #include <QtCore/QMetaMethod>
 
@@ -65,7 +66,7 @@ static PyType_Slot PySideMetaFunctionType_slots[] = {
     {0, 0}
 };
 static PyType_Spec PySideMetaFunctionType_spec = {
-    "PySide.MetaFunction",
+    "PySide2.QtCore.MetaFunction",
     sizeof(PySideMetaFunction),
     0,
     Py_TPFLAGS_DEFAULT,
@@ -101,11 +102,16 @@ PyObject *functionCall(PyObject *self, PyObject *args, PyObject * /* kw */)
 
 namespace PySide { namespace MetaFunction {
 
+static const char *MetaFunction_SignatureStrings[] = {
+    "PySide2.QtCore.MetaFunction.__call__(*args:typing.Any)->typing.Any",
+    nullptr}; // Sentinel
+
 void init(PyObject *module)
 {
-    if (PyType_Ready(PySideMetaFunctionTypeF()) < 0)
+    if (SbkSpecial_Type_Ready(module, PySideMetaFunctionTypeF(), MetaFunction_SignatureStrings) < 0)
         return;
 
+    Py_INCREF(PySideMetaFunctionTypeF());
     PyModule_AddObject(module, "MetaFunction", reinterpret_cast<PyObject *>(PySideMetaFunctionTypeF()));
 }