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, 6 insertions, 0 deletions

diff --git a/sources/shiboken2/shibokenmodule/files.dir/shibokensupport/signature/mapping.py b/sources/shiboken2/shibokenmodule/files.dir/shibokensupport/signature/mapping.py
index 36b137104..10d0f16ad 100644
--- a/sources/shiboken2/shibokenmodule/files.dir/shibokensupport/signature/mapping.py
+++ b/sources/shiboken2/shibokenmodule/files.dir/shibokensupport/signature/mapping.py
@@ -67,6 +67,10 @@ ModelIndexList = typing.List[int]
 QImageCleanupFunction = typing.Callable
 StringList = typing.List[str]
 
+# unfortunately, typing.Optional[t] expands to typing.Union[t, NoneType]
+# Until we can force it to create Optional[t] again, we use this.
+NoneType = type(None)
+
 _S = TypeVar("_S")
 
 # Building our own Char type, which is much nicer than
@@ -316,6 +320,7 @@ type_map.update({
     "zero(int)": 0,
     "zero(object)": None,
     "zero(str)": "",
+    "...": "...",
     })
 
 
@@ -345,6 +350,7 @@ def init_sample():
         "Foo.HANDLE": int,
         "HANDLE": int,
         "Null": None,
+        "nullptr": None,
         "ObjectType.Identifier": Missing("sample.ObjectType.Identifier"),
         "OddBool": bool,
         "PStr": str,