[pygobject/pygobject-3-30] GValue: fall back to the custom C marshaller to support fundamental types. See #280

[Christoph Reiter <creiter src gnome org>]

commit 383f36b9ce5612761d319e45fd695e4aafeb1dad
Author: Christoph Reiter <reiter christoph gmail com>
Date:   Mon Nov 26 22:29:01 2018 +0100

    GValue: fall back to the custom C marshaller to support fundamental types. See #280
    
    Backport from master

 gi/overrides/GObject.py | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/gi/overrides/GObject.py b/gi/overrides/GObject.py
index 68ba6d50..e2657299 100644
--- a/gi/overrides/GObject.py
+++ b/gi/overrides/GObject.py
@@ -297,7 +297,9 @@ class Value(GObjectModule.Value):
         elif gtype == TYPE_PYOBJECT:
             self.set_boxed(py_value)
         else:
-            raise TypeError("Unknown value type %s" % gtype)
+            # Fall back to _gvalue_set which handles some more cases
+            # like fundamentals for which a converter is registered
+            _gi._gvalue_set(self, py_value)
 
     def get_value(self):
         gtype = self.g_type
@@ -345,9 +347,11 @@ class Value(GObjectModule.Value):
         elif gtype == TYPE_VARIANT:
             return self.get_variant()
         elif gtype == TYPE_PYOBJECT:
-            pass
-        else:
+            return self.get_boxed()
+        elif gtype == _gi.TYPE_INVALID:
             return None
+        else:
+            return _gi._gvalue_get(self)
 
     def __repr__(self):
         return '<Value (%s) %s>' % (self.g_type.name, self.get_value())