sigc3: .hg/.ccg files: Use sigc::slot<R(Args...)> syntax.

23 files changed, 83 insertions, 83 deletions

diff --git a/gio/src/actionmap.hg b/gio/src/actionmap.hg
index 6bbc46d1..a2247aa4 100644
--- a/gio/src/actionmap.hg
+++ b/gio/src/actionmap.hg
@@ -59,7 +59,7 @@ public:
    * For instance,
    * void on_slot_activated(const Glib::VariantBase& parameter);
    */
-  using ActivateWithParameterSlot = sigc::slot<void, const Glib::VariantBase&>;
+  using ActivateWithParameterSlot = sigc::slot<void(const Glib::VariantBase&)>;
 
   //This is an equivalent for g_action_map_add_action_entries().
   /** A convenience method for creating a SimpleAction instance
@@ -88,7 +88,7 @@ public:
    * For instance,
    * void on_slot_activated();
    */
-  using ActivateSlot = sigc::slot<void>;
+  using ActivateSlot = sigc::slot<void()>;
 
   /** A convenience method for creating a SimpleAction instance
    * and adding it to the ActionMap.
@@ -136,7 +136,7 @@ public:
    * For instance,
    * void on_slot_activated(const Glib::VariantBase& parameter);
    */
-  using ActivateWithStringParameterSlot = sigc::slot<void, const Glib::ustring&>;
+  using ActivateWithStringParameterSlot = sigc::slot<void(const Glib::ustring&)>;
   
 //TODO: Docs: Add hints about how to specify the various possible states in the GtkBuilder XML.
   /** A convenience method for creating a string-based radio SimpleAction instance
@@ -165,7 +165,7 @@ public:
    * For instance,
    * void on_slot_activated(const Glib::VariantBase& parameter);
    */
-  using ActivateWithIntParameterSlot = sigc::slot<void, int>;
+  using ActivateWithIntParameterSlot = sigc::slot<void(int)>;
   
 //TODO: Docs: Add hints about how to specify the various possible states in the GtkBuilder XML.
   /** A convenience method for creating an integer-based radio SimpleAction instance
diff --git a/gio/src/application.ccg b/gio/src/application.ccg
index 7b53edf2..75e876d6 100644
--- a/gio/src/application.ccg
+++ b/gio/src/application.ccg
@@ -57,7 +57,7 @@ static void
 Application_signal_open_callback(
   GApplication* self, GFile** files, gint n_files, const gchar* hint, void* data)
 {
-  using SlotType = sigc::slot<void, const Gio::Application::type_vec_files&, const Glib::ustring&>;
+  using SlotType = sigc::slot<void(const Gio::Application::type_vec_files&, const Glib::ustring&)>;
 
   Gio::Application::type_vec_files vec_files(n_files);
   for (int i = 0; i < n_files; ++i)
@@ -92,7 +92,7 @@ Application_signal_open_notify_callback(
   GApplication* self, GFile** files, gint n_files, const gchar* hint, void* data)
 {
   using namespace Gio;
-  using SlotType = sigc::slot<void, const Application::type_vec_files&, const Glib::ustring&>;
+  using SlotType = sigc::slot<void(const Application::type_vec_files&, const Glib::ustring&)>;
 
   Application::type_vec_files vec_files(n_files);
   for (int i = 0; i < n_files; i++)
diff --git a/gio/src/asyncresult.hg b/gio/src/asyncresult.hg
index 7d9567c7..681b3802 100644
--- a/gio/src/asyncresult.hg
+++ b/gio/src/asyncresult.hg
@@ -42,7 +42,7 @@ class AsyncResult;
  *
  * @newin{2,16}
  */
-using SlotAsyncReady = sigc::slot<void, Glib::RefPtr<AsyncResult>&>;
+using SlotAsyncReady = sigc::slot<void(Glib::RefPtr<AsyncResult>&)>;
 
 /** Provides a base class for implementing asynchronous function results.
  * Asynchronous operations are broken up into two separate operations which are chained together by a SlotAsyncReady.
diff --git a/gio/src/cancellable.hg b/gio/src/cancellable.hg
index 47196c09..c1769827 100644
--- a/gio/src/cancellable.hg
+++ b/gio/src/cancellable.hg
@@ -37,7 +37,7 @@ protected:
   _CTOR_DEFAULT
 
 public:
-  using SlotCancelledCallback = sigc::slot<void>;
+  using SlotCancelledCallback = sigc::slot<void()>;
 
   _WRAP_CREATE()
 
diff --git a/gio/src/dbusconnection.hg b/gio/src/dbusconnection.hg
index 6b0e5587..96b65c8e 100644
--- a/gio/src/dbusconnection.hg
+++ b/gio/src/dbusconnection.hg
@@ -173,9 +173,9 @@ public:
    * Glib::ustring& signal_name, const Glib::VariantContainerBase& parameters);.
    * @endcode
    */
-  using SlotSignal = sigc::slot<void, const Glib::RefPtr<Connection>&,
+  using SlotSignal = sigc::slot<void(const Glib::RefPtr<Connection>&,
     const Glib::ustring&, const Glib::ustring&, const Glib::ustring&,
-    const Glib::ustring&, const Glib::VariantContainerBase&>;
+    const Glib::ustring&, const Glib::VariantContainerBase&)>;
 
   /** Signature for slot used in add_filter().
    *  For example,
@@ -191,9 +191,9 @@ public:
    * drop a message can simply return <tt>0</tt>.  And filter function may
    * modify a message by copying it and return the copy.
    */
-  using SlotMessageFilter = sigc::slot<Glib::RefPtr<Message>,
+  using SlotMessageFilter = sigc::slot<Glib::RefPtr<Message>(
     const Glib::RefPtr<Connection>&,
-    const Glib::RefPtr<Message>&, bool>;
+    const Glib::RefPtr<Message>&, bool)>;
 
   /** Asynchronously connects to the message bus specified by @a bus_type.
    *
diff --git a/gio/src/dbusinterfacevtable.hg b/gio/src/dbusinterfacevtable.hg
index caf181a7..c4081e7d 100644
--- a/gio/src/dbusinterfacevtable.hg
+++ b/gio/src/dbusinterfacevtable.hg
@@ -63,14 +63,14 @@ public:
    * @endcode
    */
   using SlotInterfaceMethodCall = sigc::slot<
-    void,
+    void(
     const Glib::RefPtr<Connection>&,
     const Glib::ustring&,
     const Glib::ustring&,
     const Glib::ustring&,
     const Glib::ustring&,
     const Glib::VariantContainerBase&,
-    const Glib::RefPtr<MethodInvocation>&
+    const Glib::RefPtr<MethodInvocation>&)
     >;
 
   /** The type for a slot which handles getting a property for a D-Bus
@@ -85,13 +85,13 @@ public:
    * @throw Glib::Error.
    */
   using SlotInterfaceGetProperty = sigc::slot<
-    void,
+    void(
     Glib::VariantBase&,
     const Glib::RefPtr<Connection>&,
     const Glib::ustring&,
     const Glib::ustring&,
     const Glib::ustring&,
-    const Glib::ustring&
+    const Glib::ustring&)
     >;
 
   /** The type for a slot which handles setting a property for a D-Bus
@@ -106,13 +106,13 @@ public:
    * @throw Glib::Error.
    */
   using SlotInterfaceSetProperty = sigc::slot<
-    bool,
+    bool(
     const Glib::RefPtr<Connection>&,
     const Glib::ustring&,
     const Glib::ustring&,
     const Glib::ustring&,
     const Glib::ustring&,
-    const Glib::VariantBase&
+    const Glib::VariantBase&)
     >;
 
   /** Constructs a new InterfaceVTable using the specified slots.
diff --git a/gio/src/dbusownname.hg b/gio/src/dbusownname.hg
index 8690d104..5944f436 100644
--- a/gio/src/dbusownname.hg
+++ b/gio/src/dbusownname.hg
@@ -35,21 +35,21 @@ _WRAP_ENUM(BusNameOwnerFlags, GBusNameOwnerFlags, s#^DBUS_##)
  * @newin{2,28}
  * @ingroup DBus
  */
-using SlotBusAcquired = sigc::slot<void, const Glib::RefPtr<Gio::DBus::Connection>&, Glib::ustring>;
+using SlotBusAcquired = sigc::slot<void(const Glib::RefPtr<Gio::DBus::Connection>&, Glib::ustring)>;
 
 /** For example,
  * void on_name_acquired(const Glib::RefPtr<Gio::DBus::Connection>& connection,
  * const Glib::ustring& name);
  * @ingroup DBus
  */
-using SlotNameAcquired = sigc::slot<void, const Glib::RefPtr<Gio::DBus::Connection>&, Glib::ustring>;
+using SlotNameAcquired = sigc::slot<void(const Glib::RefPtr<Gio::DBus::Connection>&, Glib::ustring)>;
 
 /** For example,
  * void on_name_lost(const Glib::RefPtr<Gio::DBus::Connection>& connection,
  * const Glib::ustring& name);
  * @ingroup DBus
  */
-using SlotNameLost = sigc::slot<void, const Glib::RefPtr<Gio::DBus::Connection>&, Glib::ustring>;
+using SlotNameLost = sigc::slot<void(const Glib::RefPtr<Gio::DBus::Connection>&, Glib::ustring)>;
 
 //TODO: See https://bugzilla.gnome.org/show_bug.cgi?id=646427 about the apparent uselessness of SlotNameAcquired.
 //TODO: Add example from C API in class docs.
diff --git a/gio/src/dbussubtreevtable.hg b/gio/src/dbussubtreevtable.hg
index ead80eea..3c2d6d87 100644
--- a/gio/src/dbussubtreevtable.hg
+++ b/gio/src/dbussubtreevtable.hg
@@ -67,10 +67,10 @@ public:
    * @endcode
    */
   using SlotSubtreeEnumerate = sigc::slot<
-    std::vector<Glib::ustring>,
+    std::vector<Glib::ustring>(
     const Glib::RefPtr<Connection>&,
     const Glib::ustring&,
-    const Glib::ustring&
+    const Glib::ustring&)
     >;
 
   /** The type for a slot which handles introspecting a child node.
@@ -94,11 +94,11 @@ public:
    * @endcode
    */
   using SlotSubtreeIntrospect = sigc::slot<
-    std::vector< Glib::RefPtr<Gio::DBus::InterfaceInfo> >,
+    std::vector< Glib::RefPtr<Gio::DBus::InterfaceInfo> >(
     const Glib::RefPtr<Connection>&,
     const Glib::ustring&,
     const Glib::ustring&,
-    const Glib::ustring&
+    const Glib::ustring&)
     >;
 
   /** The type for a slot which handles dispatching a remote call on a child
@@ -116,12 +116,12 @@ public:
    * @endcode
    */
   using SlotSubtreeDispatch = sigc::slot<
-    const InterfaceVTable*,
+    const InterfaceVTable*(
     const Glib::RefPtr<Connection>&,
     const Glib::ustring&,
     const Glib::ustring&,
     const Glib::ustring&,
-    const Glib::ustring&
+    const Glib::ustring&)
     >;
 
   /** Constructs a new SubtreeVTable using specified slots.
diff --git a/gio/src/dbuswatchname.hg b/gio/src/dbuswatchname.hg
index dd697ce0..63cdab4a 100644
--- a/gio/src/dbuswatchname.hg
+++ b/gio/src/dbuswatchname.hg
@@ -34,14 +34,14 @@ _WRAP_ENUM(BusNameWatcherFlags, GBusNameWatcherFlags, s#^DBUS_##, NO_GTYPE)
  * const Glib::ustring& name, const Glib::ustring& name_owner);
  * @ingroup DBus
  */
-using SlotNameAppeared = sigc::slot<void, const Glib::RefPtr<Gio::DBus::Connection>&, Glib::ustring, const Glib::ustring&>;
+using SlotNameAppeared = sigc::slot<void(const Glib::RefPtr<Gio::DBus::Connection>&, Glib::ustring, const Glib::ustring&)>;
 
 /** For example,
  * void on_name_vanished(const Glib::RefPtr<Gio::DBus::Connection>& connection,
  * const Glib::ustring& name);
  * @ingroup DBus
  */
-using SlotNameVanished = sigc::slot<void, const Glib::RefPtr<Gio::DBus::Connection>&, Glib::ustring>;
+using SlotNameVanished = sigc::slot<void(const Glib::RefPtr<Gio::DBus::Connection>&, Glib::ustring)>;
 
 //TODO: Add example from C API in class docs?
 /** Starts watching @a name on the bus specified by @a bus_type and calls
diff --git a/gio/src/file.hg b/gio/src/file.hg
index 71e1ca96..2356c406 100644
--- a/gio/src/file.hg
+++ b/gio/src/file.hg
@@ -1118,7 +1118,7 @@ public:
   /** A signal handler would be, for instance:
    * void on_file_progress(goffset current_num_bytes, goffset total_num_bytes);
    */
-  using SlotFileProgress = sigc::slot<void, goffset, goffset>;
+  using SlotFileProgress = sigc::slot<void(goffset, goffset)>;
 
   /** Copies the file source to the location specified by destination. Can not handle recursive copies of directories.
    * If the flag FILE_COPY_OVERWRITE is specified an already existing destination file is overwritten.
@@ -1803,7 +1803,7 @@ public:
   *
   * @newin{2,38}
   */
- using SlotFileMeasureProgress = sigc::slot<void, bool, guint64, guint64, guint64>;
+ using SlotFileMeasureProgress = sigc::slot<void(bool, guint64, guint64, guint64)>;
 
   //We do not use the {callback} syntax with _WRAP_METHOD here, because it expects to use user_data rather than progress_data.
   //We ignore the gboolean result, because we throw an exception if it is false.
@@ -2097,7 +2097,7 @@ public:
   /** A signal handler would be, for instance:
    * bool on_read_more(const char* file_contents, goffset file_size);
    */
-  using SlotReadMore = sigc::slot<bool, const char*, goffset>;
+  using SlotReadMore = sigc::slot<bool(const char*, goffset)>;
 
   //Note that slot_read_more can be nullptr but that would not be a useful method overload, because the documentation says that it would
   //then be equivalent to load_contents_async.
diff --git a/gio/src/memoryinputstream.hg b/gio/src/memoryinputstream.hg
index 0fc03f4a..80bac202 100644
--- a/gio/src/memoryinputstream.hg
+++ b/gio/src/memoryinputstream.hg
@@ -76,7 +76,7 @@ _DEPRECATE_IFDEF_END
    *
    * @newin{2,40}
    */
-  using SlotDestroyData = sigc::slot<void, void*>;
+  using SlotDestroyData = sigc::slot<void(void*)>;
 
   /** Appends to data that can be read from the input stream.
    *
diff --git a/glib/src/balancedtree.hg b/glib/src/balancedtree.hg
index 47073204..5444046a 100644
--- a/glib/src/balancedtree.hg
+++ b/glib/src/balancedtree.hg
@@ -57,8 +57,8 @@ class BalancedTree
 {
   _CLASS_GENERIC(BalancedTree, GTree)
 public:
-  using TraverseFunc = sigc::slot<bool, const K&, const V&>;
-  using CompareFunc = sigc::slot<int, const K&, const K&>;
+  using TraverseFunc = sigc::slot<bool(const K&, const V&)>;
+  using CompareFunc = sigc::slot<int(const K&, const K&)>;
 
 protected:
   BalancedTree() :
@@ -235,8 +235,8 @@ public:
    */
   V* search(const CompareFunc &search_func, const K& key)
   {
-    sigc::slot<int, const K&, const CompareFunc&, const K&> real_slot = sigc::ptr_fun(on_compare_key);
-    sigc::slot<int, const K&> bound_slot = sigc::bind(real_slot, search_func, key);
+    sigc::slot<int(const K&, const CompareFunc&, const K&)> real_slot = sigc::ptr_fun(on_compare_key);
+    sigc::slot<int(const K&)> bound_slot = sigc::bind(real_slot, search_func, key);
     gpointer value = g_tree_search(gobj(), c_callback_search, reinterpret_cast<gconstpointer>(&bound_slot));
 
     return reinterpret_cast<V*>(value);
@@ -278,7 +278,7 @@ private:
   /// Wrapper for invoking GCompareFunc.
   static gint c_callback_search(gconstpointer a, gconstpointer b)
   {
-    const sigc::slot<int, const K&>* slot = reinterpret_cast<const sigc::slot<int, const K&> *>(b);
+    const auto slot = reinterpret_cast<const sigc::slot<int(const K&)> *>(b);
     return (*slot)(*reinterpret_cast<const K*>(a));
   }
 
diff --git a/glib/src/binding.hg b/glib/src/binding.hg
index b30cba18..cb53709e 100644
--- a/glib/src/binding.hg
+++ b/glib/src/binding.hg
@@ -106,7 +106,7 @@ public:
    *
    * @return <tt>true</tt> if the transformation was successful, and <tt>false</tt> otherwise.
    */
-  using SlotTransform = sigc::slot<bool, const GValue*, GValue*>;
+  using SlotTransform = sigc::slot<bool(const GValue*, GValue*)>;
 
   /** Creates a binding between @a source_property and @a target_property,
    * allowing you to set the transformation functions to be used by the binding.
@@ -183,7 +183,7 @@ public:
    *         stored in a Glib::Value<T_target> object.
    * @tparam T_functor_to Type of functor that translates from the source to the target.
    *         Must be convertible to<br>
-   *         sigc::slot<bool, const T_source&, T_target&>.
+   *         sigc::slot<bool(const T_source&, T_target&)>.
    *
    * @see bind_property_value()
    *
@@ -196,7 +196,7 @@ public:
     BindingFlags flags,
     const T_functor_to& transform_to)
   {
-    sigc::slot<bool, const T_source&, T_target&> slot_transform_to = transform_to;
+    sigc::slot<bool(const T_source&, T_target&)> slot_transform_to = transform_to;
 
     return bind_property_value(source_property, target_property, flags,
       slot_transform_to.empty() ? SlotTransform() : TransformProp<T_source, T_target>(slot_transform_to));
@@ -219,7 +219,7 @@ public:
    *         stored in a Glib::Value<T_target> object.
    * @tparam T_functor_to Type of functor that translates from the source to the target.
    *         Must be convertible to<br>
-   *         sigc::slot<bool, const T_source&, T_target&>.
+   *         sigc::slot<bool(const T_source&, T_target&)>.
    *
    * @see bind_property_value()
    *
@@ -232,7 +232,7 @@ public:
     BindingFlags flags,
     const T_functor_to& transform_to)
   {
-    sigc::slot<bool, const T_source&, T_target&> slot_transform_to = transform_to;
+    sigc::slot<bool(const T_source&, T_target&)> slot_transform_to = transform_to;
 
     return bind_property_value(source_property, target_property, flags,
       slot_transform_to.empty() ? SlotTransform() : TransformProp<T_source, T_target>(slot_transform_to));
@@ -255,7 +255,7 @@ public:
    *         stored in a Glib::Value<T_target> object.
    * @tparam T_functor_to Type of functor that translates from the source to the target.
    *         Must be convertible to<br>
-   *         sigc::slot<bool, const T_source&, T_target&>.
+   *         sigc::slot<bool(const T_source&, T_target&)>.
    *
    * @see bind_property_value()
    *
@@ -268,7 +268,7 @@ public:
     BindingFlags flags,
     const T_functor_to& transform_to)
   {
-    sigc::slot<bool, const T_source&, T_target&> slot_transform_to = transform_to;
+    sigc::slot<bool(const T_source&, T_target&)> slot_transform_to = transform_to;
 
     return bind_property_value(source_property, target_property, flags,
       slot_transform_to.empty() ? SlotTransform() : TransformProp<T_source, T_target>(slot_transform_to));
@@ -291,7 +291,7 @@ public:
    *         stored in a Glib::Value<T_target> object.
    * @tparam T_functor_to Type of functor that translates from the source to the target.
    *         Must be convertible to<br>
-   *         sigc::slot<bool, const T_source&, T_target&>.
+   *         sigc::slot<bool(const T_source&, T_target&)>.
    *
    * @see bind_property_value()
    *
@@ -304,7 +304,7 @@ public:
     BindingFlags flags,
     const T_functor_to& transform_to)
   {
-    sigc::slot<bool, const T_source&, T_target&> slot_transform_to = transform_to;
+    sigc::slot<bool(const T_source&, T_target&)> slot_transform_to = transform_to;
 
     return bind_property_value(source_property, target_property, flags,
       slot_transform_to.empty() ? SlotTransform() : TransformProp<T_source, T_target>(slot_transform_to));
@@ -329,10 +329,10 @@ public:
    *         stored in a Glib::Value<T_target> object.
    * @tparam T_functor_to Type of functor that translates from the source to the target.
    *         Must be convertible to<br>
-   *         sigc::slot<bool, const T_source&, T_target&>.
+   *         sigc::slot<bool(const T_source&, T_target&)>.
    * @tparam T_functor_from Type of functor that translates from the target to the source.
    *         Must be convertible to<br>
-   *         sigc::slot<bool, const T_target&, T_source&>.
+   *         sigc::slot<bool(const T_target&, T_source&)>.
    *
    * @see bind_property_value()
    *
@@ -346,8 +346,8 @@ public:
     const T_functor_to& transform_to,
     const T_functor_from& transform_from)
   {
-    sigc::slot<bool, const T_source&, T_target&> slot_transform_to = transform_to;
-    sigc::slot<bool, const T_target&, T_source&> slot_transform_from = transform_from;
+    sigc::slot<bool(const T_source&, T_target&)> slot_transform_to = transform_to;
+    sigc::slot<bool(const T_target&, T_source&)> slot_transform_from = transform_from;
 
     return bind_property_value(source_property, target_property, flags,
       slot_transform_to.empty() ? SlotTransform() : TransformProp<T_source, T_target>(slot_transform_to),
@@ -395,7 +395,7 @@ private:
   {
   public:
     using result_type = bool;
-    using SlotTypedTransform = sigc::slot<bool, const T_from&, T_to&>;
+    using SlotTypedTransform = sigc::slot<bool(const T_from&, T_to&)>;
 
     TransformProp(const SlotTypedTransform& slot) : typed_transform(slot) {}
 
diff --git a/glib/src/bytearray.hg b/glib/src/bytearray.hg
index a921a656..4233263d 100644
--- a/glib/src/bytearray.hg
+++ b/glib/src/bytearray.hg
@@ -58,7 +58,7 @@ public:
    * int compare(const guint8* first, const guint8* second);
    * </code>
    */
-  using SlotCompare = sigc::slot<int, const guint8*, const guint8*>;
+  using SlotCompare = sigc::slot<int(const guint8*, const guint8*)>;
 
   _WRAP_METHOD(static Glib::RefPtr<ByteArray> create(), g_byte_array_new)
 
diff --git a/glib/src/nodetree.hg b/glib/src/nodetree.hg
index 75b63c04..bcec2dde 100644
--- a/glib/src/nodetree.hg
+++ b/glib/src/nodetree.hg
@@ -69,8 +69,8 @@ class NodeTree
 {
   _CLASS_GENERIC(NodeTree, GNode)
 public:
-  using TraverseFunc = sigc::slot<bool, NodeTree<T>&>;
-  using ForeachFunc = sigc::slot<void, NodeTree<T>&>;
+  using TraverseFunc = sigc::slot<bool(NodeTree<T>&)>;
+  using ForeachFunc = sigc::slot<void(NodeTree<T>&)>;
 
 private:
   static NodeTree<T>* wrap(GNode* node)
@@ -337,10 +337,10 @@ public:
    */
   NodeTree<T>* find_child(const T& the_data, TraverseFlags flags = TRAVERSE_ALL)
   {
-    sigc::slot<void, GNode*, const T&, GNode**> real_slot = sigc::ptr_fun(on_compare_child);
+    sigc::slot<void(GNode*, const T&, GNode**)> real_slot = sigc::ptr_fun(on_compare_child);
 
     GNode* child = nullptr;
-    using type_foreach_gnode_slot = sigc::slot<void, GNode*>;
+    using type_foreach_gnode_slot = sigc::slot<void(GNode*)>;
     type_foreach_gnode_slot bound_slot = sigc::bind(real_slot, the_data, &child);
 
     g_node_children_foreach(gobj(), (GTraverseFlags)flags, c_callback_foreach_compare_child, reinterpret_cast<gpointer>(&bound_slot));
@@ -371,10 +371,10 @@ public:
   NodeTree<T>* find(const T& the_data, TraverseType order = TRAVERSE_IN_ORDER, TraverseFlags flags = TRAVERSE_ALL)
   {
     //We use a sigc::slot for the C callback, so we can bind some extra data.
-    sigc::slot<gboolean, GNode*, const T&, GNode**> real_slot = sigc::ptr_fun(on_compare_node);
+    sigc::slot<gboolean(GNode*, const T&, GNode**)> real_slot = sigc::ptr_fun(on_compare_node);
     GNode* child = nullptr;
 
-    using type_traverse_gnode_slot = sigc::slot<gboolean, GNode*>;
+    using type_traverse_gnode_slot = sigc::slot<gboolean(GNode*)>;
     type_traverse_gnode_slot bound_slot = sigc::bind(real_slot, the_data, &child);
 
     g_node_traverse(const_cast<GNode*>(gobj()), (GTraverseType)order, (GTraverseFlags)flags, -1, c_callback_traverse_compare_node, reinterpret_cast<gpointer>(&bound_slot));
@@ -732,7 +732,7 @@ private:
     }
   }
 
-  /// Wrapper for invoking a sigc::slot<void,GNode*> (Internal use).
+  /// Wrapper for invoking a sigc::slot<void(GNode*)> (Internal use).
   static void c_callback_foreach_compare_child(GNode* node, gpointer data)
   {
     const ForeachFunc* slot = reinterpret_cast<const ForeachFunc*>(data);
@@ -750,7 +750,7 @@ private:
     return FALSE;
   }
 
-  /// Wrapper for invoking a sigc::slot<gboolean,GNode*> (Internal use).
+  /// Wrapper for invoking a sigc::slot<gboolean(GNode*)> (Internal use).
   static gboolean c_callback_traverse_compare_node(GNode* node, gpointer data)
   {
     const TraverseFunc* slot = reinterpret_cast<const TraverseFunc*>(data);
diff --git a/glib/src/optioncontext.hg b/glib/src/optioncontext.hg
index 9d0eb6c7..58429e79 100644
--- a/glib/src/optioncontext.hg
+++ b/glib/src/optioncontext.hg
@@ -178,7 +178,7 @@ public:
    * This function is used to translate user-visible strings, for --help output.
    * The function takes an untranslated string and returns a translated string
    */
-  using SlotTranslate = sigc::slot<Glib::ustring, const Glib::ustring&>;
+  using SlotTranslate = sigc::slot<Glib::ustring(const Glib::ustring&)>;
 
   /**
    * Sets the function which is used to translate user-visible
diff --git a/glib/src/optiongroup.hg b/glib/src/optiongroup.hg
index 9995d5f8..f1082e00 100644
--- a/glib/src/optiongroup.hg
+++ b/glib/src/optiongroup.hg
@@ -49,17 +49,17 @@ class OptionGroup
 public:
   /** For example Glib::ustring on_translate(const Glib::ustring& original);.
    */
-  using SlotTranslate = sigc::slot<Glib::ustring, const Glib::ustring&>;
+  using SlotTranslate = sigc::slot<Glib::ustring(const Glib::ustring&)>;
 
   /** For example bool on_option_arg_string(const Glib::ustring& option_name,
    *  const Glib::ustring& value, bool has_value);.
    */
-  using SlotOptionArgString = sigc::slot<bool, const Glib::ustring&, const Glib::ustring&, bool>;
+  using SlotOptionArgString = sigc::slot<bool(const Glib::ustring&, const Glib::ustring&, bool)>;
 
   /** For example bool on_option_arg_filename(const Glib::ustring& option_name,
    *  const std::string& value, bool has_value);.
    */
-  using SlotOptionArgFilename = sigc::slot<bool, const Glib::ustring&, const std::string&, bool>;
+  using SlotOptionArgFilename = sigc::slot<bool(const Glib::ustring&, const std::string&, bool)>;
 
   OptionGroup(const Glib::ustring& name, const Glib::ustring& description, const Glib::ustring& help_description = Glib::ustring());
 
diff --git a/glib/src/spawn.hg b/glib/src/spawn.hg
index 09490482..bd34ad5d 100644
--- a/glib/src/spawn.hg
+++ b/glib/src/spawn.hg
@@ -42,7 +42,7 @@ _WRAP_GERROR(SpawnError, GSpawnError, G_SPAWN_ERROR, NO_GTYPE, s#^2BIG$#TOOBIG#)
 /** For instance,<br>
  *   void on_child_setup();
  */
-using SlotSpawnChildSetup = sigc::slot<void>;
+using SlotSpawnChildSetup = sigc::slot<void()>;
 
 /** Executes a child program asynchronously (your program will not
  * block waiting for the child to exit). The child program is
diff --git a/glib/src/thread.ccg b/glib/src/thread.ccg
index 3d6d7955..7965ab99 100644
--- a/glib/src/thread.ccg
+++ b/glib/src/thread.ccg
@@ -31,7 +31,7 @@ call_thread_entry_slot(void* data)
   try
   {
     // Recreate the specific slot, and drop the reference obtained by create().
-    (*static_cast<sigc::slot<void>*>(slot))();
+    (*static_cast<sigc::slot<void()>*>(slot))();
   }
   catch (Glib::Thread::Exit&)
   {
@@ -69,10 +69,10 @@ thread_init_impl()
 
 // static
 Thread*
-Thread::create(const sigc::slot<void>& slot, bool /* joinable */)
+Thread::create(const sigc::slot<void()>& slot, bool /* joinable */)
 {
   // Make a copy of slot on the heap
-  const auto slot_copy = new sigc::slot<void>(slot);
+  const auto slot_copy = new sigc::slot<void()>(slot);
 
   GError* error = nullptr;
 
@@ -94,11 +94,11 @@ Thread::create(const sigc::slot<void>& slot, bool /* joinable */)
 
 // static
 Thread*
-Thread::create(const sigc::slot<void>& slot, unsigned long stack_size, bool joinable, bool bound,
+Thread::create(const sigc::slot<void()>& slot, unsigned long stack_size, bool joinable, bool bound,
   ThreadPriority priority)
 {
   // Make a copy of slot on the heap
-  const auto slot_copy = new sigc::slot<void>(slot);
+  const auto slot_copy = new sigc::slot<void()>(slot);
 
   GError* error = nullptr;
 
diff --git a/glib/src/thread.hg b/glib/src/thread.hg
index 57b940f2..045ce2b6 100644
--- a/glib/src/thread.hg
+++ b/glib/src/thread.hg
@@ -184,7 +184,7 @@ public:
    * @return The new Thread* on success.
    * @throw Glib::ThreadError
    */
-  static Thread* create(const sigc::slot<void>& slot, bool joinable = true);
+  static Thread* create(const sigc::slot<void()>& slot, bool joinable = true);
 
   /** Returns the Thread* corresponding to the calling thread.
    * @return The current thread.
@@ -228,9 +228,9 @@ public:
    * here as a default.
    *
    * @note Only use the extended
-   * create(const sigc::slot<void>&, unsigned long, bool, bool, ThreadPriority)
+   * create(const sigc::slot<void()>&, unsigned long, bool, bool, ThreadPriority)
    * function, when you really can't use the simple
-   * create(const sigc::slot<void>&, bool)
+   * create(const sigc::slot<void()>&, bool)
    * instead.  The latter overload does not take @a stack_size, @a bound and
    * @a priority as arguments, as they should only be used for cases, where
    * it is inevitable.
@@ -246,7 +246,7 @@ public:
    * @deprecated Use the simpler create() method instead, because all Threads
    * are now joinable, and bounds and priority parameters now have no effect.
    */
-  static Thread* create(const sigc::slot<void>& slot, unsigned long stack_size,
+  static Thread* create(const sigc::slot<void()>& slot, unsigned long stack_size,
                         bool joinable, bool bound, ThreadPriority priority);
 
   /** Returns whether the thread is joinable.
diff --git a/glib/src/threads.ccg b/glib/src/threads.ccg
index 274b5a1e..8b66493c 100644
--- a/glib/src/threads.ccg
+++ b/glib/src/threads.ccg
@@ -45,7 +45,7 @@ call_thread_entry_slot(void* data)
   try
   {
     // Recreate the specific slot.
-    (*static_cast<sigc::slot<void>*>(slot))();
+    (*static_cast<sigc::slot<void()>*>(slot))();
   }
   catch (Glib::Threads::Thread::Exit&)
   {
@@ -75,10 +75,10 @@ namespace Threads
 
 // static
 Thread*
-Thread::create(const sigc::slot<void>& slot, const std::string& name)
+Thread::create(const sigc::slot<void()>& slot, const std::string& name)
 {
   // Make a copy of slot on the heap.
-  const auto slot_copy = new sigc::slot<void>(slot);
+  const auto slot_copy = new sigc::slot<void()>(slot);
 
   GError* error = nullptr;
   auto thread = g_thread_try_new(
@@ -98,7 +98,7 @@ Thread::create(const sigc::slot<void>& slot, const std::string& name)
 
 // static
 Thread*
-Thread::create(const sigc::slot<void>& slot)
+Thread::create(const sigc::slot<void()>& slot)
 {
   return create(slot, std::string());
 }
diff --git a/glib/src/threads.hg b/glib/src/threads.hg
index 6340f45f..afd8877f 100644
--- a/glib/src/threads.hg
+++ b/glib/src/threads.hg
@@ -98,7 +98,7 @@ public:
   class Exit;
 
   //See http://bugzilla.gnome.org/show_bug.cgi?id=512348 about the sigc::trackable issue.
-  // TODO: At the next ABI break, consider changing const sigc::slot<void>& slot
+  // TODO: At the next ABI break, consider changing const sigc::slot<void()>& slot
   // to const std::function<void()>& func, if it can be assumed that all supported
   // compilers understand the C++11 template class std::function<>.
   /** Creates a new thread.
@@ -117,7 +117,7 @@ public:
    * @return The new Thread* on success.
    * @throw Glib::Threads::ThreadError
    */
-  static Thread* create(const sigc::slot<void>& slot);
+  static Thread* create(const sigc::slot<void()>& slot);
 
   // TODO: At next ABI break, remove the single parameter create
   //       method and default name to std::string()
@@ -145,7 +145,7 @@ public:
    *
    * @newin{2,36}
    */
-  static Thread* create(const sigc::slot<void>& slot, const std::string& name);
+  static Thread* create(const sigc::slot<void()>& slot, const std::string& name);
 
   /** Returns the Thread* corresponding to the calling thread.
    * @return The current thread.
diff --git a/glib/src/valuearray.hg b/glib/src/valuearray.hg
index c1b56385..06d4e705 100644
--- a/glib/src/valuearray.hg
+++ b/glib/src/valuearray.hg
@@ -55,7 +55,7 @@ public:
    *  The compare function should return -1 if v1 < v2, 0 if v1 == v2, and 1 if
    *  v1 > v2.
    */
-  using SlotCompare = sigc::slot<int, const Glib::ValueBase&, const Glib::ValueBase&>;
+  using SlotCompare = sigc::slot<int(const Glib::ValueBase&, const Glib::ValueBase&)>;
 
   /** Default constructor.  Constructs a new array with no pre-allocation.
    */