gmmproc: Add _IS_REFCOUNTED_BOXEDTYPE

* glib/glibmm/value.h: Add Value_RefPtrBoxed<>.
* tools/m4/class_opaque_refcounted.m4: Add _IS_REFCOUNTED_BOXEDTYPE, which can
be used together with _CLASS_OPAQUE_REFCOUNTED. It generates a *_get_type()
function and a Glib::Value specialization. A Glib::Value specialization is
required, if the C++ class is used in _WRAP_PROPERTY.

1 files changed, 21 insertions, 0 deletions

diff --git a/glib/glibmm/value.h b/glib/glibmm/value.h
index b5a435b7..8afc5bfb 100644
--- a/glib/glibmm/value.h
+++ b/glib/glibmm/value.h
@@ -221,6 +221,7 @@ namespace Glib
 template <class T>
 class Value_Boxed : public ValueBase_Boxed
 {
+// Used by _CLASS_BOXEDTYPE and _CLASS_BOXEDTYPE_STATIC
 public:
   using CppType = T;
 
@@ -230,6 +231,26 @@ public:
   CppType get() const { return CppType(static_cast<typename T::BaseObjectType*>(get_boxed())); }
 };
 
+/**
+ * @ingroup glibmmValue
+ */
+template <class T>
+class Value_RefPtrBoxed : public ValueBase_Boxed
+{
+// Used by _CLASS_OPAQUE_REFCOUNTED with _IS_REFCOUNTED_BOXEDTYPE
+public:
+  using CppType = Glib::RefPtr<T>;
+
+  static GType value_type() { return T::get_type(); }
+
+  // Equivalent to set_boxed(Glib::unwrap(data)) without including wrap.h.
+  void set(const CppType& data) { set_boxed(data ? data->gobj() : nullptr); }
+
+  // get() is defined in the Value<> specializations. It requires the declaration
+  // of Glib::wrap(T::BaseObjectType*, bool) to be visible.
+  // CppType get() const { return Glib::wrap(static_cast<typename T::BaseObjectType*>(get_boxed()), true); }
+};
+
 // More spec-compliant compilers (such as Tru64) need this to be near Glib::Object instead.
 #ifdef GLIBMM_CAN_USE_DYNAMIC_CAST_IN_UNUSED_TEMPLATE_WITHOUT_DEFINITION