[glibmm] Glib::ObjectBase: overload get_property()

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 722f9c1cf7998baf33d4f9d7110f6ad6c4f1858c
Author: Marcin Kolny <marcin kolny gmail com>
Date:   Thu Nov 24 15:15:07 2016 +0100

    Glib::ObjectBase: overload get_property()
    
    * glib/glibmm/objectbase.h: add convenient overload of get_property(),
      which gives a property value as a return value, not as an output
      parameter.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771782

 glib/glibmm/objectbase.h |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)
---
diff --git a/glib/glibmm/objectbase.h b/glib/glibmm/objectbase.h
index 6cbc767..c1aabbe 100644
--- a/glib/glibmm/objectbase.h
+++ b/glib/glibmm/objectbase.h
@@ -120,6 +120,10 @@ public:
   template <class PropertyType>
   void get_property(const Glib::ustring& property_name, PropertyType& value) const;
 
+  /// You probably want to use a specific property_*() accessor method instead.
+  template <class PropertyType>
+  PropertyType get_property(const Glib::ustring& property_name) const;
+
   // TODO: At the next ABI break, delete connect_property_changed_with_return()
   // and let connect_property_changed() return sigc::connection.
   /** You can use the signal_changed() signal of the property proxy instead.
@@ -294,6 +298,16 @@ ObjectBase::get_property(const Glib::ustring& property_name, PropertyType& value
   value = property_value.get();
 }
 
+template <class PropertyType>
+inline PropertyType
+ObjectBase::get_property(const Glib::ustring& property_name) const
+{
+  PropertyType value;
+  get_property(property_name, value);
+
+  return value;
+}
+
 #endif /* DOXYGEN_SHOULD_SKIP_THIS */
 
 bool _gobject_cppinstance_already_deleted(GObject* gobject);