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, 15 insertions, 5 deletions

diff --git a/sources/pyside2/libpyside/pysideproperty.cpp b/sources/pyside2/libpyside/pysideproperty.cpp
index a9cacf869..d9d15eb3b 100644
--- a/sources/pyside2/libpyside/pysideproperty.cpp
+++ b/sources/pyside2/libpyside/pysideproperty.cpp
@@ -45,8 +45,7 @@
 #include "pysidesignal_p.h"
 
 #include <shiboken.h>
-
-#define QPROPERTY_CLASS_NAME "Property"
+#include <signature.h>
 
 extern "C"
 {
@@ -82,7 +81,7 @@ static PyType_Slot PySidePropertyType_slots[] = {
 };
 // Dotted modulename is crucial for PyType_FromSpec to work. Is this name right?
 static PyType_Spec PySidePropertyType_spec = {
-    "PySide2.QtCore." QPROPERTY_CLASS_NAME,
+    "PySide2.QtCore.Property",
     sizeof(PySideProperty),
     0,
     Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_GC|Py_TPFLAGS_BASETYPE,
@@ -321,13 +320,24 @@ static PyObject *getFromType(PyTypeObject *type, PyObject *name)
 
 namespace PySide { namespace Property {
 
+static const char *Property_SignatureStrings[] = {
+    "PySide2.QtCore.Property(type:type,fget:typing.Callable=None,fset:typing.Callable=None,"
+        "freset:typing.Callable=None,fdel:typing.Callable=None,doc:str=None,"
+        "notify:typing.Callable=None,designable:bool=True,scriptable:bool=True,"
+        "stored:bool=True,user:bool=False,constant:bool=False,final:bool=False)",
+    "PySide2.QtCore.Property.getter(func:typing.Callable)",
+    "PySide2.QtCore.Property.read(func:typing.Callable)",
+    "PySide2.QtCore.Property.setter(func:typing.Callable)",
+    "PySide2.QtCore.Property.write(func:typing.Callable)",
+    nullptr}; // Sentinel
+
 void init(PyObject *module)
 {
-    if (PyType_Ready(PySidePropertyTypeF()) < 0)
+    if (SbkSpecial_Type_Ready(module, PySidePropertyTypeF(), Property_SignatureStrings) < 0)
         return;
 
     Py_INCREF(PySidePropertyTypeF());
-    PyModule_AddObject(module, QPROPERTY_CLASS_NAME, reinterpret_cast<PyObject *>(PySidePropertyTypeF()));
+    PyModule_AddObject(module, "Property", reinterpret_cast<PyObject *>(PySidePropertyTypeF()));
 }
 
 bool checkType(PyObject *pyObj)