[glibmm/gmmproc-refactor] Add Glib::unwrap() for references.

[Krzesimir Nowak <krnowak src gnome org>]

commit 97df5a85816c6278b667e7d6cd2afb5e2116d82d
Author: Krzesimir Nowak <qdlacz gmail com>
Date:   Sun May 6 05:55:49 2012 +0200

    Add Glib::unwrap() for references.
    
    glib/glibmm/wrap.h: While Glib::unwrap() for pointers (be them smart
    or plain C) makes sense, because it does checking for NULL pointers,
    then Glib::unwrap() for references is just a convenience addition,
    so I do not have to differentiate much when generating code basing
    on whether passed value is a reference or a pointer.

 glib/glibmm/wrap.h |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)
---
diff --git a/glib/glibmm/wrap.h b/glib/glibmm/wrap.h
index a65bcf6..3d4eb74 100644
--- a/glib/glibmm/wrap.h
+++ b/glib/glibmm/wrap.h
@@ -116,6 +116,14 @@ typename T::BaseObjectType* unwrap(T* ptr)
   return (ptr) ? ptr->gobj() : 0;
 }
 
+/** Get the underlying C instance from the C++ instance.
+ */
+template <class T> inline
+typename T::BaseObjectType* unwrap(T& ref)
+{
+  return ref.gobj();
+}
+
 /** Get the underlying C instance from the C++ instance.  This is just
  * like calling gobj(), but it does its own check for a NULL pointer.
  */
@@ -125,6 +133,14 @@ const typename T::BaseObjectType* unwrap(const T* ptr)
   return (ptr) ? ptr->gobj() : 0;
 }
 
+/** Get the underlying C instance from the C++ instance.
+ */
+template <class T> inline
+const typename T::BaseObjectType* unwrap(const T& ref)
+{
+  return ref.gobj();
+}
+
 /** Get the underlying C instance from the C++ instance.  This is just
  * like calling gobj(), but it does its own check for a NULL pointer.
  */