Run clang-tidy’s modernize-use-equals-default pass.

This replaces empty constructors and destructors with the default
keyword.

20 files changed, 24 insertions, 34 deletions

diff --git a/src/ui/widget/addtoicon.h b/src/ui/widget/addtoicon.h
index f79d12cdf..60c773e84 100644
--- a/src/ui/widget/addtoicon.h
+++ b/src/ui/widget/addtoicon.h
@@ -24,7 +24,7 @@ namespace Widget {
 class AddToIcon : public Gtk::CellRendererPixbuf {
 public:
     AddToIcon();
-    ~AddToIcon() override {};
+    ~AddToIcon() override = default;;
 
     Glib::PropertyProxy<bool> property_active() { return _property_active.get_proxy(); }
     Glib::PropertyProxy< Glib::RefPtr<Gdk::Pixbuf> > property_pixbuf_on();
diff --git a/src/ui/widget/attr-widget.h b/src/ui/widget/attr-widget.h
index 8dbff8874..d50bdc65a 100644
--- a/src/ui/widget/attr-widget.h
+++ b/src/ui/widget/attr-widget.h
@@ -134,7 +134,7 @@ public:
     {}
 
     virtual ~AttrWidget()
-    {}
+    = default;
 
     virtual Glib::ustring get_as_attribute() const = 0;
     virtual void set_from_attribute(SPObject*) = 0;
diff --git a/src/ui/widget/clipmaskicon.h b/src/ui/widget/clipmaskicon.h
index d355a1caf..25725e33a 100644
--- a/src/ui/widget/clipmaskicon.h
+++ b/src/ui/widget/clipmaskicon.h
@@ -24,7 +24,7 @@ namespace Widget {
 class ClipMaskIcon : public Gtk::CellRendererPixbuf {
 public:
     ClipMaskIcon();
-    ~ClipMaskIcon() override {};
+    ~ClipMaskIcon() override = default;;
 
     Glib::PropertyProxy<int> property_active() { return _property_active.get_proxy(); }
     Glib::PropertyProxy< Glib::RefPtr<Gdk::Pixbuf> > property_pixbuf_on();
diff --git a/src/ui/widget/color-scales.cpp b/src/ui/widget/color-scales.cpp
index 620e77cbf..57555a53d 100644
--- a/src/ui/widget/color-scales.cpp
+++ b/src/ui/widget/color-scales.cpp
@@ -729,7 +729,7 @@ ColorScalesFactory::ColorScalesFactory(SPColorScalesMode submode)
 {
 }
 
-ColorScalesFactory::~ColorScalesFactory() {}
+ColorScalesFactory::~ColorScalesFactory() = default;
 
 Gtk::Widget *ColorScalesFactory::createWidget(Inkscape::UI::SelectedColor &color) const
 {
diff --git a/src/ui/widget/highlight-picker.cpp b/src/ui/widget/highlight-picker.cpp
index 3d8ab50ea..a3abc32bb 100644
--- a/src/ui/widget/highlight-picker.cpp
+++ b/src/ui/widget/highlight-picker.cpp
@@ -28,8 +28,7 @@ HighlightPicker::HighlightPicker() :
 }
 
 HighlightPicker::~HighlightPicker()
-{
-}
+= default;
 
 void HighlightPicker::get_preferred_height_vfunc(Gtk::Widget& widget,
                                               int& min_h,
diff --git a/src/ui/widget/imagetoggler.h b/src/ui/widget/imagetoggler.h
index f537cc74c..86c12bc03 100644
--- a/src/ui/widget/imagetoggler.h
+++ b/src/ui/widget/imagetoggler.h
@@ -25,7 +25,7 @@ namespace Widget {
 class ImageToggler : public Gtk::CellRendererPixbuf {
 public:
     ImageToggler( char const *on, char const *off);
-    ~ImageToggler() override {};
+    ~ImageToggler() override = default;;
 
     sigc::signal<void, const Glib::ustring&> signal_toggled() { return _signal_toggled;}
     sigc::signal<void, GdkEvent const *> signal_pre_toggle()  { return _signal_pre_toggle; }
diff --git a/src/ui/widget/ink-spinscale.h b/src/ui/widget/ink-spinscale.h
index 7cb82c92a..a5807f8dc 100644
--- a/src/ui/widget/ink-spinscale.h
+++ b/src/ui/widget/ink-spinscale.h
@@ -31,7 +31,7 @@ class InkScale : public Gtk::Scale
 {
  public:
   InkScale(Glib::RefPtr<Gtk::Adjustment>, Gtk::SpinButton* spinbutton);
-  ~InkScale() override {};
+  ~InkScale() override = default;;
 
   void set_label(Glib::ustring label);
 
@@ -71,7 +71,7 @@ class InkSpinScale : public Gtk::Box
   // Create an InkSpinScale with a preexisting adjustment.
   InkSpinScale(Glib::RefPtr<Gtk::Adjustment>);
 
-  ~InkSpinScale() override {};
+  ~InkSpinScale() override = default;;
 
   void set_label(Glib::ustring label);
   void set_digits(int digits);
diff --git a/src/ui/widget/insertordericon.h b/src/ui/widget/insertordericon.h
index 5c4c19603..b736007f4 100644
--- a/src/ui/widget/insertordericon.h
+++ b/src/ui/widget/insertordericon.h
@@ -25,7 +25,7 @@ namespace Widget {
 class InsertOrderIcon : public Gtk::CellRendererPixbuf {
 public:
     InsertOrderIcon();
-    ~InsertOrderIcon() override {};
+    ~InsertOrderIcon() override = default;;
 
     Glib::PropertyProxy<int> property_active() { return _property_active.get_proxy(); }
     Glib::PropertyProxy< Glib::RefPtr<Gdk::Pixbuf> > property_pixbuf_on();
diff --git a/src/ui/widget/layertypeicon.h b/src/ui/widget/layertypeicon.h
index 5f7e79c29..e84bef261 100644
--- a/src/ui/widget/layertypeicon.h
+++ b/src/ui/widget/layertypeicon.h
@@ -24,7 +24,7 @@ namespace Widget {
 class LayerTypeIcon : public Gtk::CellRendererPixbuf {
 public:
     LayerTypeIcon();
-    ~LayerTypeIcon() override {};
+    ~LayerTypeIcon() override = default;;
 
     sigc::signal<void, const Glib::ustring&> signal_toggled() { return _signal_toggled;}
     sigc::signal<void, GdkEvent const *> signal_pre_toggle()  { return _signal_pre_toggle; }
diff --git a/src/ui/widget/page-sizer.cpp b/src/ui/widget/page-sizer.cpp
index 579049d29..b8eeca00d 100644
--- a/src/ui/widget/page-sizer.cpp
+++ b/src/ui/widget/page-sizer.cpp
@@ -464,8 +464,7 @@ PageSizer::PageSizer(Registry & _wr)
  * Destructor
  */
 PageSizer::~PageSizer()
-{
-}
+= default;
 
 
 
diff --git a/src/ui/widget/page-sizer.h b/src/ui/widget/page-sizer.h
index 001c6a65d..edc9f5b0c 100644
--- a/src/ui/widget/page-sizer.h
+++ b/src/ui/widget/page-sizer.h
@@ -81,7 +81,7 @@ public:
      * Destructor
      */	     
 	virtual ~PaperSize()
-	    {}
+	    = default;
 	    
     /**
      * Name of this paper specification
diff --git a/src/ui/widget/panel.cpp b/src/ui/widget/panel.cpp
index 7b54995c1..73897aeb5 100644
--- a/src/ui/widget/panel.cpp
+++ b/src/ui/widget/panel.cpp
@@ -59,8 +59,7 @@ Panel::Panel(gchar const *prefs_path, int verb_num) :
 }
 
 Panel::~Panel()
-{
-}
+= default;
 
 void Panel::present()
 {
diff --git a/src/ui/widget/preferences-widget.h b/src/ui/widget/preferences-widget.h
index 129a7b336..acd59fe94 100644
--- a/src/ui/widget/preferences-widget.h
+++ b/src/ui/widget/preferences-widget.h
@@ -251,7 +251,7 @@ class PrefColorPicker : public ColorPicker
 {
 public:
     PrefColorPicker() : ColorPicker("", "", 0, false) {};
-    ~PrefColorPicker() override {};
+    ~PrefColorPicker() override = default;;
 
     void init(Glib::ustring const &abel, Glib::ustring const &prefs_path,
               guint32 default_rgba);
diff --git a/src/ui/widget/registered-widget.h b/src/ui/widget/registered-widget.h
index bb0f6da8a..033ab9541 100644
--- a/src/ui/widget/registered-widget.h
+++ b/src/ui/widget/registered-widget.h
@@ -83,7 +83,7 @@ protected:
     template< typename A, typename B, typename C, typename D, typename E , typename F, typename G>
     RegisteredWidget( A& a, B& b, C& c, D& d, E& e, F f, G& g): W( a, b, c, d, e, f, g) { construct(); }
 
-    ~RegisteredWidget() override {};
+    ~RegisteredWidget() override = default;;
 
     void init_parent(const Glib::ustring& key, Registry& wr, Inkscape::XML::Node* repr_in, SPDocument *doc_in)
     {
diff --git a/src/ui/widget/registry.cpp b/src/ui/widget/registry.cpp
index ea8198422..9972e1acd 100644
--- a/src/ui/widget/registry.cpp
+++ b/src/ui/widget/registry.cpp
@@ -23,7 +23,7 @@ namespace Widget {
 
 Registry::Registry() : _updating(false) {}
 
-Registry::~Registry() {}
+Registry::~Registry() = default;
 
 bool
 Registry::isUpdating()
diff --git a/src/ui/widget/rotateable.cpp b/src/ui/widget/rotateable.cpp
index 0e290730d..64b37a07f 100644
--- a/src/ui/widget/rotateable.cpp
+++ b/src/ui/widget/rotateable.cpp
@@ -160,8 +160,7 @@ bool Rotateable::on_scroll(GdkEventScroll* event)
     return TRUE;
 }
 
-Rotateable::~Rotateable() {
-}
+Rotateable::~Rotateable() = default;
 
 
 
diff --git a/src/ui/widget/selected-style.cpp b/src/ui/widget/selected-style.cpp
index c0b0a7f56..b5fdc721d 100644
--- a/src/ui/widget/selected-style.cpp
+++ b/src/ui/widget/selected-style.cpp
@@ -1207,8 +1207,7 @@ RotateableSwatch::RotateableSwatch(SelectedStyle *parent, guint mode) :
 {
 }
 
-RotateableSwatch::~RotateableSwatch() {
-}
+RotateableSwatch::~RotateableSwatch() = default;
 
 double
 RotateableSwatch::color_adjust(float *hsla, double by, guint32 cc, guint modifier)
@@ -1408,8 +1407,7 @@ RotateableStrokeWidth::RotateableStrokeWidth(SelectedStyle *parent) :
 {
 }
 
-RotateableStrokeWidth::~RotateableStrokeWidth() {
-}
+RotateableStrokeWidth::~RotateableStrokeWidth() = default;
 
 double
 RotateableStrokeWidth::value_adjust(double current, double by, guint /*modifier*/, bool final)
diff --git a/src/ui/widget/spinbutton.h b/src/ui/widget/spinbutton.h
index 28d9849a8..918e7047f 100644
--- a/src/ui/widget/spinbutton.h
+++ b/src/ui/widget/spinbutton.h
@@ -45,7 +45,7 @@ public:
       connect_signals();
   };
 
-  ~SpinButton() override {};
+  ~SpinButton() override = default;;
 
   void setUnitMenu(UnitMenu* unit_menu) { _unit_menu = unit_menu; };
   
diff --git a/src/ui/widget/style-subject.cpp b/src/ui/widget/style-subject.cpp
index 5eccc67cf..04de4b162 100644
--- a/src/ui/widget/style-subject.cpp
+++ b/src/ui/widget/style-subject.cpp
@@ -38,11 +38,9 @@ void StyleSubject::setDesktop(SPDesktop *desktop) {
     }
 }
 
-StyleSubject::Selection::Selection() {
-}
+StyleSubject::Selection::Selection() = default;
 
-StyleSubject::Selection::~Selection() {
-}
+StyleSubject::Selection::~Selection() = default;
 
 Inkscape::Selection *StyleSubject::Selection::_getSelection() const {
     SPDesktop *desktop = getDesktop();
@@ -105,8 +103,7 @@ StyleSubject::CurrentLayer::CurrentLayer() {
     _element = nullptr;
 }
 
-StyleSubject::CurrentLayer::~CurrentLayer() {
-}
+StyleSubject::CurrentLayer::~CurrentLayer() = default;
 
 void StyleSubject::CurrentLayer::_setLayer(SPObject *layer) {
     _layer_release.disconnect();
diff --git a/src/ui/widget/unit-menu.cpp b/src/ui/widget/unit-menu.cpp
index 423313a1f..fd10b567e 100644
--- a/src/ui/widget/unit-menu.cpp
+++ b/src/ui/widget/unit-menu.cpp
@@ -26,8 +26,7 @@ UnitMenu::UnitMenu() : _type(UNIT_TYPE_NONE)
     set_active(0);
 }
 
-UnitMenu::~UnitMenu() {
-}
+UnitMenu::~UnitMenu() = default;
 
 bool UnitMenu::setUnitType(UnitType unit_type) 
 {