Replace abort() with Q_ASSERT and Q_UNREACHABLE

This change replaces abort() with Q_ASSERT and Q_UNREACHABLE() macros to
make kwin code base consistent. Besides that, Q_UNREACHABLE may
potentially provide the compiler more info that can be used to generate
more efficient machine code.

src/abstract_client.cpp

@@ -1237,7 +1237,7 @@ void AbstractClient::handleInteractiveMoveResize(int x, int y, int x_root, int y
                 break;
             case PositionCenter:
             default:
-                abort();
+                Q_UNREACHABLE();
                 break;
             }
         };
@@ -1442,8 +1442,9 @@ void AbstractClient::handleInteractiveMoveResize(int x, int y, int x_root, int y
         }
         if (moveResizeGeometry().topLeft() != previousMoveResizeGeom.topLeft())
             update = true;
-    } else
-        abort();
+    } else {
+        Q_UNREACHABLE();
+    }
 
     if (!update)
         return;

src/backends/libinput/events.cpp

@@ -116,8 +116,9 @@ InputRedirection::KeyboardKeyState KeyEvent::state() const
         return InputRedirection::KeyboardKeyPressed;
     case LIBINPUT_KEY_STATE_RELEASED:
         return InputRedirection::KeyboardKeyReleased;
+    default:
+        Q_UNREACHABLE();
     }
-    abort();
 }
 
 uint32_t KeyEvent::time() const
@@ -183,8 +184,9 @@ InputRedirection::PointerButtonState PointerEvent::buttonState() const
         return InputRedirection::PointerButtonPressed;
     case LIBINPUT_BUTTON_STATE_RELEASED:
         return InputRedirection::PointerButtonReleased;
+    default:
+        Q_UNREACHABLE();
     }
-    abort();
 }
 
 QVector<InputRedirection::PointerAxis> PointerEvent::axis() const

src/effects.cpp

@@ -1857,7 +1857,7 @@ void EffectWindowImpl::refWindow()
     if (auto d = qobject_cast<Deleted *>(toplevel)) {
         return d->refWindow();
     }
-    abort(); // TODO
+    Q_UNREACHABLE(); // TODO
 }
 
 void EffectWindowImpl::unrefWindow()
@@ -1865,7 +1865,7 @@ void EffectWindowImpl::unrefWindow()
     if (auto d = qobject_cast<Deleted *>(toplevel)) {
         return d->unrefWindow();   // delays deletion in case
     }
-    abort(); // TODO
+    Q_UNREACHABLE(); // TODO
 }
 
 EffectScreen *EffectWindowImpl::screen() const

src/effects/presentwindows/presentwindows.cpp

@@ -1998,7 +1998,7 @@ EffectWindow* PresentWindowsEffect::relativeWindow(EffectWindow *w, int xdiff, i
         }
     }
 
-    abort(); // Should never get here
+    Q_UNREACHABLE(); // Should never get here
 }
 
 EffectWindow* PresentWindowsEffect::findFirstWindow() const

src/kcmkwin/kwinscreenedges/monitor.cpp

@@ -189,7 +189,7 @@ int Monitor::selectedEdgeItem(int edge) const
             return actions.indexOf(act);
         }
     }
-    abort();
+    Q_UNREACHABLE();
 }
 
 void Monitor::popup(Corner* c, QPoint pos)
@@ -209,7 +209,7 @@ void Monitor::popup(Corner* c, QPoint pos)
             return;
         }
     }
-    abort();
+    Q_UNREACHABLE();
 }
 
 void Monitor::flip(Corner* c, QPoint pos)
@@ -225,7 +225,7 @@ void Monitor::flip(Corner* c, QPoint pos)
             return;
         }
     }
-    abort();
+    Q_UNREACHABLE();
 }
 
 Monitor::Corner::Corner(Monitor* m)

src/libkwineffects/kwineffects.cpp

@@ -1382,8 +1382,7 @@ void WindowMotionManager::apply(EffectWindow *w, WindowPaintData &data)
 void WindowMotionManager::moveWindow(EffectWindow *w, QPoint target, double scale, double yScale)
 {
     QHash<EffectWindow*, WindowMotion>::iterator it = m_managedWindows.find(w);
-    if (it == m_managedWindows.end())
-        abort(); // Notify the effect author that they did something wrong
+    Q_ASSERT(it != m_managedWindows.end()); // Notify the effect author that they did something wrong
 
     WindowMotion *motion = &it.value();
 

src/useractions.cpp

@@ -179,8 +179,9 @@ void UserActionsMenu::helperDialog(const QString& message, AbstractClient* clien
                  "activated using the %1 keyboard shortcut.",
                  shortcut(QStringLiteral("Window Operations Menu")));
         type = QStringLiteral("altf3warning");
-    } else
-        abort();
+    } else {
+        Q_UNREACHABLE();
+    }
     if (!type.isEmpty()) {
         KConfig cfg(QStringLiteral("kwin_dialogsrc"));
         KConfigGroup cg(&cfg, "Notification Messages");  // Depends on KMessageBox

src/workspace.cpp

@@ -2718,7 +2718,7 @@ QRect Workspace::adjustClientSize(AbstractClient* c, QRect moveResizeGeom, int m
                 SNAP_BORDER_LEFT
                 break;
             default:
-                abort();
+                Q_UNREACHABLE();
                 break;
             }
 
@@ -2846,7 +2846,7 @@ QRect Workspace::adjustClientSize(AbstractClient* c, QRect moveResizeGeom, int m
                         SNAP_WINDOW_C_LEFT
                         break;
                     default:
-                        abort();
+                        Q_UNREACHABLE();
                         break;
                     }
                 }

src/x11client.cpp

@@ -1189,7 +1189,7 @@ void X11Client::detectNoBorder()
         noborder = false;
         break;
     default:
-        abort();
+        Q_UNREACHABLE();
     }
     // NET::Override is some strange beast without clear definition, usually
     // just meaning "noborder", so let's treat it only as such flag, and ignore it as
@@ -4660,7 +4660,7 @@ StrutRect X11Client::strutRect(StrutArea area) const
                              ), StrutAreaLeft);
         break;
     default:
-        abort(); // Not valid
+        Q_UNREACHABLE(); // Not valid
     }
     return StrutRect(); // Null rect
 }