debugger: make '0' the 'invalid' BreakpointId value

src/plugins/debugger/breakhandler.cpp

@@ -154,7 +154,7 @@ BreakpointId BreakHandler::findSimilarBreakpoint(const BreakpointResponse &needl
         if (isSimilarTo(data, needle))
             return id;
     }
-    return BreakpointId(-1);
+    return BreakpointId();
 }
 
 BreakpointId BreakHandler::findBreakpointByNumber(int bpNumber) const
@@ -163,7 +163,7 @@ BreakpointId BreakHandler::findBreakpointByNumber(int bpNumber) const
     for ( ; it != et; ++it)
         if (it->response.number == bpNumber)
             return it.key();
-    return BreakpointId(-1);
+    return BreakpointId();
 }
 
 BreakpointId BreakHandler::findBreakpointByFunction(const QString &functionName) const
@@ -172,7 +172,7 @@ BreakpointId BreakHandler::findBreakpointByFunction(const QString &functionName)
     for ( ; it != et; ++it)
         if (it->data.functionName == functionName)
             return it.key();
-    return BreakpointId(-1);
+    return BreakpointId();
 }
 
 BreakpointId BreakHandler::findBreakpointByAddress(quint64 address) const
@@ -181,7 +181,7 @@ BreakpointId BreakHandler::findBreakpointByAddress(quint64 address) const
     for ( ; it != et; ++it)
         if (it->data.address == address)
             return it.key();
-    return BreakpointId(-1);
+    return BreakpointId();
 }
 
 BreakpointId BreakHandler::findBreakpointByFileAndLine(const QString &fileName,
@@ -191,7 +191,7 @@ BreakpointId BreakHandler::findBreakpointByFileAndLine(const QString &fileName,
     for ( ; it != et; ++it)
         if (it->isLocatedAt(fileName, lineNumber, useMarkerPosition))
             return it.key();
-    return BreakpointId(-1);
+    return BreakpointId();
 }
 
 const BreakpointParameters &BreakHandler::breakpointData(BreakpointId id) const
@@ -208,25 +208,25 @@ BreakpointId BreakHandler::findWatchpointByAddress(quint64 address) const
     for ( ; it != et; ++it)
         if (it->data.isWatchpoint() && it->data.address == address)
             return it.key();
-    return BreakpointId(-1);
+    return BreakpointId();
 }
 
 void BreakHandler::setWatchpointByAddress(quint64 address)
 {
     const int id = findWatchpointByAddress(address);
-    if (id == -1) {
-        BreakpointParameters data(Watchpoint);
-        data.address = address;
-        appendBreakpoint(data);
-    } else {
+    if (id) {
         qDebug() << "WATCHPOINT EXISTS";
-     //   removeBreakpoint(index);
+        //   removeBreakpoint(index);
+        return;
     }
+    BreakpointParameters data(Watchpoint);
+    data.address = address;
+    appendBreakpoint(data);
 }
 
 bool BreakHandler::hasWatchpointAt(quint64 address) const
 {
-    return findWatchpointByAddress(address) != BreakpointId(-1);
+    return findWatchpointByAddress(address);
 }
 
 void BreakHandler::saveBreakpoints()
@@ -354,7 +354,7 @@ BreakpointId BreakHandler::findBreakpointByIndex(const QModelIndex &index) const
     for (int i = 0; it != et; ++it, ++i)
         if (i == r)
             return it.key();
-    return BreakpointId(-1);
+    return BreakpointId();
 }
 
 BreakpointIds BreakHandler::findBreakpointsByIndex(const QList<QModelIndex> &list) const

src/plugins/debugger/cdb2/cdbengine2.cpp

@@ -1316,7 +1316,7 @@ void CdbEngine::handleSessionIdle(const QByteArray &message)
     if (reason == "breakpoint") {
         const int number = stopReason.findChild("breakpointId").data().toInt();
         const BreakpointId id = breakHandler()->findBreakpointByNumber(number);
-        if (id != BreakpointId(-1) && breakHandler()->type(id) == Debugger::Internal::Watchpoint) {
+        if (id && breakHandler()->type(id) == Debugger::Internal::Watchpoint) {
             showStatusMessage(msgWatchpointTriggered(id, number, breakHandler()->address(id), QString::number(threadId)));
         } else {
             showStatusMessage(msgBreakpointTriggered(id, number, QString::number(threadId)));

src/plugins/debugger/debuggerengine.cpp

@@ -1338,7 +1338,7 @@ bool DebuggerEngine::isDying() const
 QString DebuggerEngine::msgWatchpointTriggered(BreakpointId id,
     const int number, quint64 address)
 {
-    return id != BreakpointId(-1)
+    return id
         ? tr("Watchpoint %1 (%2) at 0x%3 triggered.")
             .arg(id).arg(number).arg(address, 0, 16)
         : tr("Internal watchpoint %1 at 0x%2 triggered.")
@@ -1348,7 +1348,7 @@ QString DebuggerEngine::msgWatchpointTriggered(BreakpointId id,
 QString DebuggerEngine::msgWatchpointTriggered(BreakpointId id,
     const int number, quint64 address, const QString &threadId)
 {
-    return id != BreakpointId(-1)
+    return id
         ? tr("Watchpoint %1 (%2) at 0x%3 in thread %4 triggered.")
             .arg(id).arg(number).arg(address, 0, 16).arg(threadId)
         : tr("Internal watchpoint %1 at 0x%2 in thread %3 triggered.")
@@ -1358,7 +1358,7 @@ QString DebuggerEngine::msgWatchpointTriggered(BreakpointId id,
 QString DebuggerEngine::msgBreakpointTriggered(BreakpointId id,
         const int number, const QString &threadId)
 {
-    return id != BreakpointId(-1)
+    return id
         ? tr("Stopped at breakpoint %1 (%2) in thread %3.")
             .arg(id).arg(number).arg(threadId)
         : tr("Stopped at internal breakpoint %1 in thread %2.")

src/plugins/debugger/debuggerplugin.cpp

@@ -2391,7 +2391,7 @@ void DebuggerPluginPrivate::requestContextMenu(TextEditor::ITextEditor *editor,
     if (!isDebuggable(editor))
         return;
 
-    BreakpointId id = -1;
+    BreakpointId id = BreakpointId();
     QString fileName;
     quint64 address = 0;
 
@@ -2415,7 +2415,7 @@ void DebuggerPluginPrivate::requestContextMenu(TextEditor::ITextEditor *editor,
     args.append(lineNumber);
     args.append(address);
 
-    if (id != BreakpointId(-1)) {
+    if (id) {
         // Remove existing breakpoint.
         QAction *act = new QAction(menu);
         act->setData(int(id));
@@ -2497,10 +2497,10 @@ void DebuggerPluginPrivate::toggleBreakpointByFileAndLine(const QString &fileNam
     BreakHandler *handler = m_breakHandler;
     BreakpointId id =
         handler->findBreakpointByFileAndLine(fileName, lineNumber, true);
-    if (id == BreakpointId(-1))
+    if (!id)
         id = handler->findBreakpointByFileAndLine(fileName, lineNumber, false);
 
-    if (id != BreakpointId(-1)) {
+    if (id) {
         handler->removeBreakpoint(id);
     } else {
         BreakpointParameters data(BreakpointByFileAndLine);
@@ -2516,7 +2516,7 @@ void DebuggerPluginPrivate::toggleBreakpointByAddress(quint64 address)
     BreakHandler *handler = m_breakHandler;
     BreakpointId id = handler->findBreakpointByAddress(address);
 
-    if (id != BreakpointId(-1)) {
+    if (id) {
         handler->removeBreakpoint(id);
     } else {
         BreakpointParameters data(BreakpointByAddress);