Index: include/lldb/API/SBAddress.h
===================================================================
--- include/lldb/API/SBAddress.h
+++ include/lldb/API/SBAddress.h
@@ -31,6 +31,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void Clear();
 
   addr_t GetFileAddress() const;
Index: include/lldb/API/SBBlock.h
===================================================================
--- include/lldb/API/SBBlock.h
+++ include/lldb/API/SBBlock.h
@@ -30,6 +30,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const char *GetInlinedName() const;
 
   lldb::SBFileSpec GetInlinedCallSiteFile() const;
Index: include/lldb/API/SBBreakpoint.h
===================================================================
--- include/lldb/API/SBBreakpoint.h
+++ include/lldb/API/SBBreakpoint.h
@@ -38,6 +38,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void ClearAllBreakpointSites();
 
   lldb::SBBreakpointLocation FindLocationByAddress(lldb::addr_t vm_addr);
Index: include/lldb/API/SBBreakpointLocation.h
===================================================================
--- include/lldb/API/SBBreakpointLocation.h
+++ include/lldb/API/SBBreakpointLocation.h
@@ -29,6 +29,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   lldb::SBAddress GetAddress();
 
   lldb::addr_t GetLoadAddress();
Index: include/lldb/API/SBBreakpointName.h
===================================================================
--- include/lldb/API/SBBreakpointName.h
+++ include/lldb/API/SBBreakpointName.h
@@ -40,7 +40,9 @@
   bool operator!=(const lldb::SBBreakpointName &rhs);
 
   bool IsValid() const;
-  
+
+  explicit operator bool() const;
+
   const char *GetName() const;
 
   void SetEnabled(bool enable);
Index: include/lldb/API/SBBroadcaster.h
===================================================================
--- include/lldb/API/SBBroadcaster.h
+++ include/lldb/API/SBBroadcaster.h
@@ -27,6 +27,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void Clear();
 
   void BroadcastEventByType(uint32_t event_type, bool unique = false);
Index: include/lldb/API/SBCommandInterpreter.h
===================================================================
--- include/lldb/API/SBCommandInterpreter.h
+++ include/lldb/API/SBCommandInterpreter.h
@@ -89,6 +89,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   bool CommandExists(const char *cmd);
 
   bool AliasExists(const char *cmd);
@@ -274,6 +276,8 @@
 
   bool IsValid();
 
+  explicit operator bool() const;
+
   const char *GetName();
 
   const char *GetHelp();
Index: include/lldb/API/SBCommandReturnObject.h
===================================================================
--- include/lldb/API/SBCommandReturnObject.h
+++ include/lldb/API/SBCommandReturnObject.h
@@ -34,6 +34,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const char *GetOutput();
 
   const char *GetError();
Index: include/lldb/API/SBCommunication.h
===================================================================
--- include/lldb/API/SBCommunication.h
+++ include/lldb/API/SBCommunication.h
@@ -39,6 +39,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   lldb::SBBroadcaster GetBroadcaster();
 
   static const char *GetBroadcasterClass();
Index: include/lldb/API/SBCompileUnit.h
===================================================================
--- include/lldb/API/SBCompileUnit.h
+++ include/lldb/API/SBCompileUnit.h
@@ -26,6 +26,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   lldb::SBFileSpec GetFileSpec() const;
 
   uint32_t GetNumLineEntries() const;
Index: include/lldb/API/SBData.h
===================================================================
--- include/lldb/API/SBData.h
+++ include/lldb/API/SBData.h
@@ -31,6 +31,8 @@
 
   bool IsValid();
 
+  explicit operator bool() const;
+
   size_t GetByteSize();
 
   lldb::ByteOrder GetByteOrder();
Index: include/lldb/API/SBDebugger.h
===================================================================
--- include/lldb/API/SBDebugger.h
+++ include/lldb/API/SBDebugger.h
@@ -64,6 +64,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void Clear();
 
   void SetAsync(bool b);
Index: include/lldb/API/SBDeclaration.h
===================================================================
--- include/lldb/API/SBDeclaration.h
+++ include/lldb/API/SBDeclaration.h
@@ -27,6 +27,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   lldb::SBFileSpec GetFileSpec() const;
 
   uint32_t GetLine() const;
Index: include/lldb/API/SBError.h
===================================================================
--- include/lldb/API/SBError.h
+++ include/lldb/API/SBError.h
@@ -48,6 +48,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   bool GetDescription(lldb::SBStream &description);
 
 protected:
Index: include/lldb/API/SBEvent.h
===================================================================
--- include/lldb/API/SBEvent.h
+++ include/lldb/API/SBEvent.h
@@ -37,6 +37,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const char *GetDataFlavor();
 
   uint32_t GetType() const;
Index: include/lldb/API/SBFileSpec.h
===================================================================
--- include/lldb/API/SBFileSpec.h
+++ include/lldb/API/SBFileSpec.h
@@ -30,6 +30,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   bool Exists() const;
 
   bool ResolveExecutableLocation();
Index: include/lldb/API/SBFrame.h
===================================================================
--- include/lldb/API/SBFrame.h
+++ include/lldb/API/SBFrame.h
@@ -28,6 +28,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   uint32_t GetFrameID() const;
 
   lldb::addr_t GetCFA() const;
Index: include/lldb/API/SBFunction.h
===================================================================
--- include/lldb/API/SBFunction.h
+++ include/lldb/API/SBFunction.h
@@ -27,6 +27,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const char *GetName() const;
 
   const char *GetDisplayName() const;
Index: include/lldb/API/SBInstruction.h
===================================================================
--- include/lldb/API/SBInstruction.h
+++ include/lldb/API/SBInstruction.h
@@ -33,6 +33,8 @@
 
   bool IsValid();
 
+  explicit operator bool() const;
+
   SBAddress GetAddress();
 
   const char *GetMnemonic(lldb::SBTarget target);
Index: include/lldb/API/SBInstructionList.h
===================================================================
--- include/lldb/API/SBInstructionList.h
+++ include/lldb/API/SBInstructionList.h
@@ -27,6 +27,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   size_t GetSize();
 
   lldb::SBInstruction GetInstructionAtIndex(uint32_t idx);
Index: include/lldb/API/SBLineEntry.h
===================================================================
--- include/lldb/API/SBLineEntry.h
+++ include/lldb/API/SBLineEntry.h
@@ -31,6 +31,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   lldb::SBFileSpec GetFileSpec() const;
 
   uint32_t GetLine() const;
Index: include/lldb/API/SBListener.h
===================================================================
--- include/lldb/API/SBListener.h
+++ include/lldb/API/SBListener.h
@@ -31,6 +31,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   uint32_t StartListeningForEventClass(SBDebugger &debugger,
                                        const char *broadcaster_class,
                                        uint32_t event_mask);
Index: include/lldb/API/SBModule.h
===================================================================
--- include/lldb/API/SBModule.h
+++ include/lldb/API/SBModule.h
@@ -33,6 +33,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void Clear();
 
   //------------------------------------------------------------------
Index: include/lldb/API/SBModuleSpec.h
===================================================================
--- include/lldb/API/SBModuleSpec.h
+++ include/lldb/API/SBModuleSpec.h
@@ -26,6 +26,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void Clear();
 
   //------------------------------------------------------------------
Index: include/lldb/API/SBPlatform.h
===================================================================
--- include/lldb/API/SBPlatform.h
+++ include/lldb/API/SBPlatform.h
@@ -93,6 +93,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void Clear();
 
   const char *GetWorkingDirectory();
Index: include/lldb/API/SBProcess.h
===================================================================
--- include/lldb/API/SBProcess.h
+++ include/lldb/API/SBProcess.h
@@ -53,6 +53,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   lldb::SBTarget GetTarget() const;
 
   lldb::ByteOrder GetByteOrder() const;
Index: include/lldb/API/SBProcessInfo.h
===================================================================
--- include/lldb/API/SBProcessInfo.h
+++ include/lldb/API/SBProcessInfo.h
@@ -24,6 +24,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const char *GetName();
 
   SBFileSpec GetExecutableFile();
Index: include/lldb/API/SBQueue.h
===================================================================
--- include/lldb/API/SBQueue.h
+++ include/lldb/API/SBQueue.h
@@ -30,6 +30,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void Clear();
 
   lldb::SBProcess GetProcess();
Index: include/lldb/API/SBQueueItem.h
===================================================================
--- include/lldb/API/SBQueueItem.h
+++ include/lldb/API/SBQueueItem.h
@@ -24,6 +24,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void Clear();
 
   lldb::QueueItemKind GetKind() const;
Index: include/lldb/API/SBSection.h
===================================================================
--- include/lldb/API/SBSection.h
+++ include/lldb/API/SBSection.h
@@ -26,6 +26,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const char *GetName();
 
   lldb::SBSection GetParent();
Index: include/lldb/API/SBStream.h
===================================================================
--- include/lldb/API/SBStream.h
+++ include/lldb/API/SBStream.h
@@ -25,6 +25,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   // If this stream is not redirected to a file, it will maintain a local cache
   // for the stream data which can be accessed using this accessor.
   const char *GetData();
Index: include/lldb/API/SBStringList.h
===================================================================
--- include/lldb/API/SBStringList.h
+++ include/lldb/API/SBStringList.h
@@ -25,6 +25,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void AppendString(const char *str);
 
   void AppendList(const char **strv, int strc);
Index: include/lldb/API/SBStructuredData.h
===================================================================
--- include/lldb/API/SBStructuredData.h
+++ include/lldb/API/SBStructuredData.h
@@ -30,6 +30,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   lldb::SBError SetFromJSON(lldb::SBStream &stream);
 
   void Clear();
Index: include/lldb/API/SBSymbol.h
===================================================================
--- include/lldb/API/SBSymbol.h
+++ include/lldb/API/SBSymbol.h
@@ -28,6 +28,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const char *GetName() const;
 
   const char *GetDisplayName() const;
Index: include/lldb/API/SBSymbolContext.h
===================================================================
--- include/lldb/API/SBSymbolContext.h
+++ include/lldb/API/SBSymbolContext.h
@@ -31,6 +31,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const lldb::SBSymbolContext &operator=(const lldb::SBSymbolContext &rhs);
 
   lldb::SBModule GetModule();
Index: include/lldb/API/SBSymbolContextList.h
===================================================================
--- include/lldb/API/SBSymbolContextList.h
+++ include/lldb/API/SBSymbolContextList.h
@@ -27,6 +27,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   uint32_t GetSize() const;
 
   lldb::SBSymbolContext GetContextAtIndex(uint32_t idx);
Index: include/lldb/API/SBTarget.h
===================================================================
--- include/lldb/API/SBTarget.h
+++ include/lldb/API/SBTarget.h
@@ -57,6 +57,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   static bool EventIsTargetEvent(const lldb::SBEvent &event);
 
   static lldb::SBTarget GetTargetFromEvent(const lldb::SBEvent &event);
Index: include/lldb/API/SBThread.h
===================================================================
--- include/lldb/API/SBThread.h
+++ include/lldb/API/SBThread.h
@@ -41,6 +41,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void Clear();
 
   lldb::StopReason GetStopReason();
Index: include/lldb/API/SBThreadCollection.h
===================================================================
--- include/lldb/API/SBThreadCollection.h
+++ include/lldb/API/SBThreadCollection.h
@@ -25,6 +25,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   size_t GetSize();
 
   lldb::SBThread GetThreadAtIndex(size_t idx);
Index: include/lldb/API/SBThreadPlan.h
===================================================================
--- include/lldb/API/SBThreadPlan.h
+++ include/lldb/API/SBThreadPlan.h
@@ -32,6 +32,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void Clear();
 
   lldb::StopReason GetStopReason();
Index: include/lldb/API/SBTrace.h
===================================================================
--- include/lldb/API/SBTrace.h
+++ include/lldb/API/SBTrace.h
@@ -102,6 +102,8 @@
 
   bool IsValid();
 
+  explicit operator bool() const;
+
 protected:
   typedef std::shared_ptr<TraceImpl> TraceImplSP;
 
Index: include/lldb/API/SBTraceOptions.h
===================================================================
--- include/lldb/API/SBTraceOptions.h
+++ include/lldb/API/SBTraceOptions.h
@@ -46,6 +46,8 @@
 
   bool IsValid();
 
+  explicit operator bool() const;
+
 protected:
   friend class SBProcess;
   friend class SBTrace;
Index: include/lldb/API/SBType.h
===================================================================
--- include/lldb/API/SBType.h
+++ include/lldb/API/SBType.h
@@ -27,6 +27,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const char *GetName();
 
   lldb::SBType GetType();
@@ -66,6 +68,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const char *GetName();
 
   const char *GetDemangledName();
@@ -107,6 +111,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   uint64_t GetByteSize();
 
   bool IsPointerType();
@@ -237,6 +243,8 @@
 
   bool IsValid();
 
+  explicit operator bool() const;
+
   void Append(lldb::SBType type);
 
   lldb::SBType GetTypeAtIndex(uint32_t index);
Index: include/lldb/API/SBTypeCategory.h
===================================================================
--- include/lldb/API/SBTypeCategory.h
+++ include/lldb/API/SBTypeCategory.h
@@ -24,6 +24,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   bool GetEnabled();
 
   void SetEnabled(bool);
Index: include/lldb/API/SBTypeEnumMember.h
===================================================================
--- include/lldb/API/SBTypeEnumMember.h
+++ include/lldb/API/SBTypeEnumMember.h
@@ -26,6 +26,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   int64_t GetValueAsSigned();
 
   uint64_t GetValueAsUnsigned();
@@ -64,6 +66,8 @@
 
   bool IsValid();
 
+  explicit operator bool() const;
+
   void Append(SBTypeEnumMember entry);
 
   SBTypeEnumMember GetTypeEnumMemberAtIndex(uint32_t index);
Index: include/lldb/API/SBTypeFilter.h
===================================================================
--- include/lldb/API/SBTypeFilter.h
+++ include/lldb/API/SBTypeFilter.h
@@ -26,6 +26,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   uint32_t GetNumberOfExpressionPaths();
 
   const char *GetExpressionPathAtIndex(uint32_t i);
Index: include/lldb/API/SBTypeFormat.h
===================================================================
--- include/lldb/API/SBTypeFormat.h
+++ include/lldb/API/SBTypeFormat.h
@@ -30,6 +30,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   lldb::Format GetFormat();
 
   const char *GetTypeName();
Index: include/lldb/API/SBTypeNameSpecifier.h
===================================================================
--- include/lldb/API/SBTypeNameSpecifier.h
+++ include/lldb/API/SBTypeNameSpecifier.h
@@ -28,6 +28,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const char *GetName();
 
   SBType GetType();
Index: include/lldb/API/SBTypeSummary.h
===================================================================
--- include/lldb/API/SBTypeSummary.h
+++ include/lldb/API/SBTypeSummary.h
@@ -25,6 +25,8 @@
 
   bool IsValid();
 
+  explicit operator bool() const;
+
   lldb::LanguageType GetLanguage();
 
   lldb::TypeSummaryCapping GetCapping();
@@ -81,6 +83,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   bool IsFunctionCode();
 
   bool IsFunctionName();
Index: include/lldb/API/SBTypeSynthetic.h
===================================================================
--- include/lldb/API/SBTypeSynthetic.h
+++ include/lldb/API/SBTypeSynthetic.h
@@ -34,6 +34,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   bool IsClassCode();
 
   bool IsClassName();
Index: include/lldb/API/SBUnixSignals.h
===================================================================
--- include/lldb/API/SBUnixSignals.h
+++ include/lldb/API/SBUnixSignals.h
@@ -28,6 +28,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   const char *GetSignalAsCString(int32_t signo) const;
 
   int32_t GetSignalNumberFromName(const char *name) const;
Index: include/lldb/API/SBValue.h
===================================================================
--- include/lldb/API/SBValue.h
+++ include/lldb/API/SBValue.h
@@ -30,6 +30,8 @@
 
   bool IsValid();
 
+  explicit operator bool() const;
+
   void Clear();
 
   SBError GetError();
Index: include/lldb/API/SBValueList.h
===================================================================
--- include/lldb/API/SBValueList.h
+++ include/lldb/API/SBValueList.h
@@ -25,6 +25,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   void Clear();
 
   void Append(const lldb::SBValue &val_obj);
Index: include/lldb/API/SBVariablesOptions.h
===================================================================
--- include/lldb/API/SBVariablesOptions.h
+++ include/lldb/API/SBVariablesOptions.h
@@ -28,6 +28,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   bool GetIncludeArguments() const;
 
   void SetIncludeArguments(bool);
Index: include/lldb/API/SBWatchpoint.h
===================================================================
--- include/lldb/API/SBWatchpoint.h
+++ include/lldb/API/SBWatchpoint.h
@@ -27,6 +27,8 @@
 
   bool IsValid() const;
 
+  explicit operator bool() const;
+
   SBError GetError();
 
   watch_id_t GetID();
Index: scripts/Python/modify-python-lldb.py
===================================================================
--- scripts/Python/modify-python-lldb.py
+++ scripts/Python/modify-python-lldb.py
@@ -332,11 +332,6 @@
     if one_liner_docstring_pattern.match(line):
         line = char_to_str_xform(line)
 
-    # Look for 'def IsValid(*args):', and once located, add implementation
-    # of truth value testing for this object by delegation.
-    if isvalid_pattern.search(line):
-        new_content.add_line(nonzero_def)
-
     # Pass the original line of content to new_content.
     new_content.add_line(line)
 
Index: scripts/interface/SBAddress.i
===================================================================
--- scripts/interface/SBAddress.i
+++ scripts/interface/SBAddress.i
@@ -62,6 +62,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     void
     Clear ();
 
Index: scripts/interface/SBBlock.i
===================================================================
--- scripts/interface/SBBlock.i
+++ scripts/interface/SBBlock.i
@@ -30,6 +30,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     %feature("docstring", "
     Get the function name if this block represents an inlined function;
     otherwise, return None.
Index: scripts/interface/SBBreakpoint.i
===================================================================
--- scripts/interface/SBBreakpoint.i
+++ scripts/interface/SBBreakpoint.i
@@ -91,6 +91,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     void
     ClearAllBreakpointSites ();
 
Index: scripts/interface/SBBreakpointLocation.i
===================================================================
--- scripts/interface/SBBreakpointLocation.i
+++ scripts/interface/SBBreakpointLocation.i
@@ -34,6 +34,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     lldb::SBAddress
     GetAddress();
     
Index: scripts/interface/SBBreakpointName.i
===================================================================
--- scripts/interface/SBBreakpointName.i
+++ scripts/interface/SBBreakpointName.i
@@ -43,6 +43,8 @@
   bool operator!=(const lldb::SBBreakpointName &rhs);
 
   bool IsValid() const;
+
+  explicit operator bool() const;
   
   const char *GetName() const;
 
Index: scripts/interface/SBBroadcaster.i
===================================================================
--- scripts/interface/SBBroadcaster.i
+++ scripts/interface/SBBroadcaster.i
@@ -33,6 +33,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     void
     Clear ();
 
Index: scripts/interface/SBCommandInterpreter.i
===================================================================
--- scripts/interface/SBCommandInterpreter.i
+++ scripts/interface/SBCommandInterpreter.i
@@ -145,6 +145,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     const char *
     GetIOHandlerControlSequence(char ch);
 
Index: scripts/interface/SBCommandReturnObject.i
===================================================================
--- scripts/interface/SBCommandReturnObject.i
+++ scripts/interface/SBCommandReturnObject.i
@@ -28,6 +28,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     const char *
     GetOutput ();
 
Index: scripts/interface/SBCommunication.i
===================================================================
--- scripts/interface/SBCommunication.i
+++ scripts/interface/SBCommunication.i
@@ -30,6 +30,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     lldb::SBBroadcaster
     GetBroadcaster ();
 
Index: scripts/interface/SBCompileUnit.i
===================================================================
--- scripts/interface/SBCompileUnit.i
+++ scripts/interface/SBCompileUnit.i
@@ -56,6 +56,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     lldb::SBFileSpec
     GetFileSpec () const;
 
Index: scripts/interface/SBData.i
===================================================================
--- scripts/interface/SBData.i
+++ scripts/interface/SBData.i
@@ -31,6 +31,8 @@
     bool
     IsValid();
 
+    explicit operator bool() const;
+
     size_t
     GetByteSize ();
 
Index: scripts/interface/SBDebugger.i
===================================================================
--- scripts/interface/SBDebugger.i
+++ scripts/interface/SBDebugger.i
@@ -152,6 +152,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     void
     Clear ();
 
Index: scripts/interface/SBDeclaration.i
===================================================================
--- scripts/interface/SBDeclaration.i
+++ scripts/interface/SBDeclaration.i
@@ -23,6 +23,8 @@
         
         bool
         IsValid () const;
+
+        explicit operator bool() const;
         
         lldb::SBFileSpec
         GetFileSpec () const;
Index: scripts/interface/SBError.i
===================================================================
--- scripts/interface/SBError.i
+++ scripts/interface/SBError.i
@@ -101,6 +101,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     bool
     GetDescription (lldb::SBStream &description);
     
Index: scripts/interface/SBEvent.i
===================================================================
--- scripts/interface/SBEvent.i
+++ scripts/interface/SBEvent.i
@@ -124,6 +124,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     const char *
     GetDataFlavor ();
 
Index: scripts/interface/SBFileSpec.i
===================================================================
--- scripts/interface/SBFileSpec.i
+++ scripts/interface/SBFileSpec.i
@@ -45,6 +45,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     bool
     Exists () const;
 
Index: scripts/interface/SBFrame.i
===================================================================
--- scripts/interface/SBFrame.i
+++ scripts/interface/SBFrame.i
@@ -59,6 +59,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     uint32_t
     GetFrameID () const;
 
Index: scripts/interface/SBFunction.i
===================================================================
--- scripts/interface/SBFunction.i
+++ scripts/interface/SBFunction.i
@@ -55,6 +55,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     const char *
     GetName() const;
     
Index: scripts/interface/SBInstruction.i
===================================================================
--- scripts/interface/SBInstruction.i
+++ scripts/interface/SBInstruction.i
@@ -26,6 +26,8 @@
     bool
     IsValid();
 
+    explicit operator bool() const;
+
     lldb::SBAddress
     GetAddress();
 
Index: scripts/interface/SBInstructionList.i
===================================================================
--- scripts/interface/SBInstructionList.i
+++ scripts/interface/SBInstructionList.i
@@ -37,6 +37,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     size_t
     GetSize ();
 
Index: scripts/interface/SBLineEntry.i
===================================================================
--- scripts/interface/SBLineEntry.i
+++ scripts/interface/SBLineEntry.i
@@ -55,6 +55,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     lldb::SBFileSpec
     GetFileSpec () const;
 
Index: scripts/interface/SBListener.i
===================================================================
--- scripts/interface/SBListener.i
+++ scripts/interface/SBListener.i
@@ -33,6 +33,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     uint32_t
     StartListeningForEventClass (SBDebugger &debugger,
                                  const char *broadcaster_class, 
Index: scripts/interface/SBModule.i
===================================================================
--- scripts/interface/SBModule.i
+++ scripts/interface/SBModule.i
@@ -130,6 +130,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     void
     Clear();
 
Index: scripts/interface/SBModuleSpec.i
===================================================================
--- scripts/interface/SBModuleSpec.i
+++ scripts/interface/SBModuleSpec.i
@@ -20,6 +20,8 @@
     
     bool
     IsValid () const;
+
+    explicit operator bool() const;
     
     void
     Clear();
Index: scripts/interface/SBPlatform.i
===================================================================
--- scripts/interface/SBPlatform.i
+++ scripts/interface/SBPlatform.i
@@ -118,6 +118,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     void
     Clear ();
 
Index: scripts/interface/SBProcess.i
===================================================================
--- scripts/interface/SBProcess.i
+++ scripts/interface/SBProcess.i
@@ -68,6 +68,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     lldb::SBTarget
     GetTarget() const;
 
Index: scripts/interface/SBProcessInfo.i
===================================================================
--- scripts/interface/SBProcessInfo.i
+++ scripts/interface/SBProcessInfo.i
@@ -25,6 +25,8 @@
     bool
     IsValid ();
 
+    explicit operator bool() const;
+
     const char *
     GetName ();
 
Index: scripts/interface/SBQueue.i
===================================================================
--- scripts/interface/SBQueue.i
+++ scripts/interface/SBQueue.i
@@ -20,6 +20,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     void
     Clear ();
 
Index: scripts/interface/SBQueueItem.i
===================================================================
--- scripts/interface/SBQueueItem.i
+++ scripts/interface/SBQueueItem.i
@@ -20,6 +20,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     void
     Clear ();
 
Index: scripts/interface/SBSection.i
===================================================================
--- scripts/interface/SBSection.i
+++ scripts/interface/SBSection.i
@@ -49,6 +49,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     const char *
     GetName ();
 
Index: scripts/interface/SBStream.i
===================================================================
--- scripts/interface/SBStream.i
+++ scripts/interface/SBStream.i
@@ -48,6 +48,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     %feature("docstring", "
     //--------------------------------------------------------------------------
     /// If this stream is not redirected to a file, it will maintain a local
Index: scripts/interface/SBStringList.i
===================================================================
--- scripts/interface/SBStringList.i
+++ scripts/interface/SBStringList.i
@@ -21,6 +21,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     void
     AppendString (const char *str);
 
Index: scripts/interface/SBStructuredData.i
===================================================================
--- scripts/interface/SBStructuredData.i
+++ scripts/interface/SBStructuredData.i
@@ -28,6 +28,8 @@
         bool
         IsValid() const;
 
+        explicit operator bool() const;
+
         void
         Clear();
 
Index: scripts/interface/SBSymbol.i
===================================================================
--- scripts/interface/SBSymbol.i
+++ scripts/interface/SBSymbol.i
@@ -27,6 +27,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
 
     const char *
     GetName() const;
Index: scripts/interface/SBSymbolContext.i
===================================================================
--- scripts/interface/SBSymbolContext.i
+++ scripts/interface/SBSymbolContext.i
@@ -57,6 +57,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     lldb::SBModule        GetModule ();
     lldb::SBCompileUnit   GetCompileUnit ();
     lldb::SBFunction      GetFunction ();
Index: scripts/interface/SBSymbolContextList.i
===================================================================
--- scripts/interface/SBSymbolContextList.i
+++ scripts/interface/SBSymbolContextList.i
@@ -41,6 +41,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     uint32_t
     GetSize() const;
 
Index: scripts/interface/SBTarget.i
===================================================================
--- scripts/interface/SBTarget.i
+++ scripts/interface/SBTarget.i
@@ -80,6 +80,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     static bool
     EventIsTargetEvent (const lldb::SBEvent &event);
 
Index: scripts/interface/SBThread.i
===================================================================
--- scripts/interface/SBThread.i
+++ scripts/interface/SBThread.i
@@ -74,6 +74,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     void
     Clear ();
 
Index: scripts/interface/SBThreadCollection.i
===================================================================
--- scripts/interface/SBThreadCollection.i
+++ scripts/interface/SBThreadCollection.i
@@ -25,6 +25,8 @@
     
     bool
     IsValid () const;
+
+    explicit operator bool() const;
     
     size_t
     GetSize ();
Index: scripts/interface/SBThreadPlan.i
===================================================================
--- scripts/interface/SBThreadPlan.i
+++ scripts/interface/SBThreadPlan.i
@@ -40,6 +40,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     void
     Clear ();
 
@@ -90,6 +92,8 @@
     bool
     IsValid();
 
+    explicit operator bool() const;
+
     // This section allows an SBThreadPlan to push another of the common types of plans...
     SBThreadPlan
     QueueThreadPlanForStepOverRange (SBAddress &start_address,
Index: scripts/interface/SBTrace.i
===================================================================
--- scripts/interface/SBTrace.i
+++ scripts/interface/SBTrace.i
@@ -29,5 +29,7 @@
 
   bool IsValid();
 
+  explicit operator bool() const;
+
 };
-} // namespace lldb
\ No newline at end of file
+} // namespace lldb
Index: scripts/interface/SBTraceOptions.i
===================================================================
--- scripts/interface/SBTraceOptions.i
+++ scripts/interface/SBTraceOptions.i
@@ -33,5 +33,7 @@
   lldb::tid_t getThreadID();
 
   bool IsValid();
+
+  explicit operator bool() const;
 };
 }
Index: scripts/interface/SBType.i
===================================================================
--- scripts/interface/SBType.i
+++ scripts/interface/SBType.i
@@ -24,6 +24,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     const char *
     GetName ();
     
@@ -78,6 +80,8 @@
     
     bool
     IsValid() const;
+
+    explicit operator bool() const;
     
     const char *
     GetName ();
@@ -196,6 +200,8 @@
     bool
     IsValid();
 
+    explicit operator bool() const;
+
     uint64_t
     GetByteSize();
 
@@ -487,6 +493,8 @@
     bool
     IsValid();
 
+    explicit operator bool() const;
+
     void
     Append (lldb::SBType type);
 
Index: scripts/interface/SBTypeCategory.i
===================================================================
--- scripts/interface/SBTypeCategory.i
+++ scripts/interface/SBTypeCategory.i
@@ -24,6 +24,8 @@
         
         bool
         IsValid() const;
+
+        explicit operator bool() const;
         
         bool
         GetEnabled ();
Index: scripts/interface/SBTypeEnumMember.i
===================================================================
--- scripts/interface/SBTypeEnumMember.i
+++ scripts/interface/SBTypeEnumMember.i
@@ -25,6 +25,8 @@
     bool
     IsValid() const;
 
+    explicit operator bool() const;
+
     int64_t
     GetValueAsSigned();
 
@@ -90,6 +92,8 @@
     bool
     IsValid();
 
+    explicit operator bool() const;
+
     void
     Append (SBTypeEnumMember entry);
 
Index: scripts/interface/SBTypeFilter.i
===================================================================
--- scripts/interface/SBTypeFilter.i
+++ scripts/interface/SBTypeFilter.i
@@ -26,6 +26,8 @@
         
         bool
         IsValid() const;
+
+        explicit operator bool() const;
         
         bool
         IsEqualTo (lldb::SBTypeFilter &rhs);
Index: scripts/interface/SBTypeFormat.i
===================================================================
--- scripts/interface/SBTypeFormat.i
+++ scripts/interface/SBTypeFormat.i
@@ -28,6 +28,8 @@
         
         bool
         IsValid() const;
+
+        explicit operator bool() const;
         
         bool
         IsEqualTo (lldb::SBTypeFormat &rhs);
Index: scripts/interface/SBTypeNameSpecifier.i
===================================================================
--- scripts/interface/SBTypeNameSpecifier.i
+++ scripts/interface/SBTypeNameSpecifier.i
@@ -29,6 +29,8 @@
         
         bool
         IsValid() const;
+
+        explicit operator bool() const;
         
         bool
         IsEqualTo (lldb::SBTypeNameSpecifier &rhs);
Index: scripts/interface/SBTypeSummary.i
===================================================================
--- scripts/interface/SBTypeSummary.i
+++ scripts/interface/SBTypeSummary.i
@@ -18,6 +18,8 @@
         
         bool
         IsValid ();
+
+        explicit operator bool() const;
         
         lldb::LanguageType
         GetLanguage ();
@@ -57,6 +59,8 @@
         
         bool
         IsValid() const;
+
+        explicit operator bool() const;
         
         bool
         IsEqualTo (lldb::SBTypeSummary &rhs);
Index: scripts/interface/SBTypeSynthetic.i
===================================================================
--- scripts/interface/SBTypeSynthetic.i
+++ scripts/interface/SBTypeSynthetic.i
@@ -30,6 +30,8 @@
         
         bool
         IsValid() const;
+
+        explicit operator bool() const;
         
         bool
         IsEqualTo (lldb::SBTypeSynthetic &rhs);
Index: scripts/interface/SBUnixSignals.i
===================================================================
--- scripts/interface/SBUnixSignals.i
+++ scripts/interface/SBUnixSignals.i
@@ -26,6 +26,8 @@
     bool
     IsValid () const;
 
+    explicit operator bool() const;
+
     const char *
     GetSignalAsCString (int32_t signo) const;
 
Index: scripts/interface/SBValue.i
===================================================================
--- scripts/interface/SBValue.i
+++ scripts/interface/SBValue.i
@@ -65,6 +65,8 @@
 
     bool
     IsValid();
+
+    explicit operator bool() const;
     
     void
     Clear();
Index: scripts/interface/SBValueList.i
===================================================================
--- scripts/interface/SBValueList.i
+++ scripts/interface/SBValueList.i
@@ -77,6 +77,8 @@
 
     bool
     IsValid() const;
+
+    explicit operator bool() const;
     
     void 
     Clear();
Index: scripts/interface/SBVariablesOptions.i
===================================================================
--- scripts/interface/SBVariablesOptions.i
+++ scripts/interface/SBVariablesOptions.i
@@ -19,6 +19,8 @@
     
     bool
     IsValid () const;
+
+    explicit operator bool() const;
     
     bool
     GetIncludeArguments ()  const;
Index: scripts/interface/SBWatchpoint.i
===================================================================
--- scripts/interface/SBWatchpoint.i
+++ scripts/interface/SBWatchpoint.i
@@ -30,6 +30,8 @@
     bool
     IsValid();
 
+    explicit operator bool() const;
+
     SBError
     GetError();
 
Index: scripts/lldb.swig
===================================================================
--- scripts/lldb.swig
+++ scripts/lldb.swig
@@ -95,9 +95,8 @@
 # ==============================================================================
 # The modify-python-lldb.py script is responsible for post-processing this SWIG-
 # generated lldb.py module.  It is responsible for adding support for: iteration
-# protocol: __iter__, rich comparison methods: __eq__ and __ne__, truth value
-# testing (and built-in operation bool()): __nonzero__, and built-in function
-# len(): __len__.
+# protocol: __iter__, rich comparison methods: __eq__ and __ne__, and built-in
+# function len(): __len__.
 # ==============================================================================
 %}
 
Index: source/API/SBAddress.cpp
===================================================================
--- source/API/SBAddress.cpp
+++ source/API/SBAddress.cpp
@@ -60,7 +60,9 @@
   return false;
 }
 
-bool SBAddress::IsValid() const {
+bool SBAddress::IsValid() const { return bool(*this); }
+
+SBAddress::operator bool() const {
   return m_opaque_up != NULL && m_opaque_up->IsValid();
 }
 
Index: source/API/SBBlock.cpp
===================================================================
--- source/API/SBBlock.cpp
+++ source/API/SBBlock.cpp
@@ -39,7 +39,9 @@
 
 SBBlock::~SBBlock() { m_opaque_ptr = NULL; }
 
-bool SBBlock::IsValid() const { return m_opaque_ptr != NULL; }
+bool SBBlock::IsValid() const { return bool(*this); }
+
+SBBlock::operator bool() const { return m_opaque_ptr != NULL; }
 
 bool SBBlock::IsInlined() const {
   if (m_opaque_ptr)
Index: source/API/SBBreakpoint.cpp
===================================================================
--- source/API/SBBreakpoint.cpp
+++ source/API/SBBreakpoint.cpp
@@ -78,7 +78,9 @@
   return break_id;
 }
 
-bool SBBreakpoint::IsValid() const {
+bool SBBreakpoint::IsValid() const { return bool(*this); }
+
+SBBreakpoint::operator bool() const {
   BreakpointSP bkpt_sp = GetSP();
   if (!bkpt_sp)
     return false;
Index: source/API/SBBreakpointLocation.cpp
===================================================================
--- source/API/SBBreakpointLocation.cpp
+++ source/API/SBBreakpointLocation.cpp
@@ -58,7 +58,9 @@
   return m_opaque_wp.lock();
 }
 
-bool SBBreakpointLocation::IsValid() const { return bool(GetSP()); }
+bool SBBreakpointLocation::IsValid() const { return bool(*this); }
+
+SBBreakpointLocation::operator bool() const { return bool(GetSP()); }
 
 SBAddress SBBreakpointLocation::GetAddress() {
   BreakpointLocationSP loc_sp = GetSP();
Index: source/API/SBBreakpointName.cpp
===================================================================
--- source/API/SBBreakpointName.cpp
+++ source/API/SBBreakpointName.cpp
@@ -170,7 +170,9 @@
   return *m_impl_up != *rhs.m_impl_up;
 }
 
-bool SBBreakpointName::IsValid() const {
+bool SBBreakpointName::IsValid() const { return bool(*this); }
+
+SBBreakpointName::operator bool() const {
   if (!m_impl_up)
     return false;
   return m_impl_up->IsValid();
Index: source/API/SBBroadcaster.cpp
===================================================================
--- source/API/SBBroadcaster.cpp
+++ source/API/SBBroadcaster.cpp
@@ -130,7 +130,9 @@
   m_opaque_ptr = broadcaster;
 }
 
-bool SBBroadcaster::IsValid() const { return m_opaque_ptr != NULL; }
+bool SBBroadcaster::IsValid() const { return bool(*this); }
+
+SBBroadcaster::operator bool() const { return m_opaque_ptr != NULL; }
 
 void SBBroadcaster::Clear() {
   m_opaque_sp.reset();
Index: source/API/SBCommandInterpreter.cpp
===================================================================
--- source/API/SBCommandInterpreter.cpp
+++ source/API/SBCommandInterpreter.cpp
@@ -150,7 +150,9 @@
   return *this;
 }
 
-bool SBCommandInterpreter::IsValid() const { return m_opaque_ptr != nullptr; }
+bool SBCommandInterpreter::IsValid() const { return bool(*this); }
+
+SBCommandInterpreter::operator bool() const { return m_opaque_ptr != nullptr; }
 
 bool SBCommandInterpreter::CommandExists(const char *cmd) {
   return (((cmd != nullptr) && IsValid()) ? m_opaque_ptr->CommandExists(cmd)
@@ -584,7 +586,9 @@
 
 SBCommand::SBCommand(lldb::CommandObjectSP cmd_sp) : m_opaque_sp(cmd_sp) {}
 
-bool SBCommand::IsValid() { return m_opaque_sp.get() != nullptr; }
+bool SBCommand::IsValid() { return bool(*this); }
+
+SBCommand::operator bool() const { return m_opaque_sp.get() != nullptr; }
 
 const char *SBCommand::GetName() {
   return (IsValid() ? ConstString(m_opaque_sp->GetCommandName()).AsCString() : nullptr);
Index: source/API/SBCommandReturnObject.cpp
===================================================================
--- source/API/SBCommandReturnObject.cpp
+++ source/API/SBCommandReturnObject.cpp
@@ -47,7 +47,9 @@
   return *this;
 }
 
-bool SBCommandReturnObject::IsValid() const { return m_opaque_up != nullptr; }
+bool SBCommandReturnObject::IsValid() const { return bool(*this); }
+
+SBCommandReturnObject::operator bool() const { return m_opaque_up != nullptr; }
 
 const char *SBCommandReturnObject::GetOutput() {
   Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
Index: source/API/SBCommunication.cpp
===================================================================
--- source/API/SBCommunication.cpp
+++ source/API/SBCommunication.cpp
@@ -35,7 +35,9 @@
   m_opaque_owned = false;
 }
 
-bool SBCommunication::IsValid() const { return m_opaque != NULL; }
+bool SBCommunication::IsValid() const { return bool(*this); }
+
+SBCommunication::operator bool() const { return m_opaque != NULL; }
 
 bool SBCommunication::GetCloseOnEOF() {
   if (m_opaque)
Index: source/API/SBCompileUnit.cpp
===================================================================
--- source/API/SBCompileUnit.cpp
+++ source/API/SBCompileUnit.cpp
@@ -190,7 +190,9 @@
   return lldb::eLanguageTypeUnknown;
 }
 
-bool SBCompileUnit::IsValid() const { return m_opaque_ptr != NULL; }
+bool SBCompileUnit::IsValid() const { return bool(*this); }
+
+SBCompileUnit::operator bool() const { return m_opaque_ptr != NULL; }
 
 bool SBCompileUnit::operator==(const SBCompileUnit &rhs) const {
   return m_opaque_ptr == rhs.m_opaque_ptr;
Index: source/API/SBData.cpp
===================================================================
--- source/API/SBData.cpp
+++ source/API/SBData.cpp
@@ -50,7 +50,9 @@
 
 const lldb::DataExtractorSP &SBData::operator*() const { return m_opaque_sp; }
 
-bool SBData::IsValid() { return m_opaque_sp.get() != NULL; }
+bool SBData::IsValid() { return bool(*this); }
+
+SBData::operator bool() const { return m_opaque_sp.get() != NULL; }
 
 uint8_t SBData::GetAddressByteSize() {
   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
Index: source/API/SBDebugger.cpp
===================================================================
--- source/API/SBDebugger.cpp
+++ source/API/SBDebugger.cpp
@@ -275,7 +275,9 @@
   ModuleList::RemoveOrphanSharedModules(mandatory);
 }
 
-bool SBDebugger::IsValid() const { return m_opaque_sp.get() != nullptr; }
+bool SBDebugger::IsValid() const { return bool(*this); }
+
+SBDebugger::operator bool() const { return m_opaque_sp.get() != nullptr; }
 
 void SBDebugger::SetAsync(bool b) {
   if (m_opaque_sp)
Index: source/API/SBDeclaration.cpp
===================================================================
--- source/API/SBDeclaration.cpp
+++ source/API/SBDeclaration.cpp
@@ -48,7 +48,9 @@
 
 SBDeclaration::~SBDeclaration() {}
 
-bool SBDeclaration::IsValid() const {
+bool SBDeclaration::IsValid() const { return bool(*this); }
+
+SBDeclaration::operator bool() const {
   return m_opaque_up.get() && m_opaque_up->IsValid();
 }
 
Index: source/API/SBError.cpp
===================================================================
--- source/API/SBError.cpp
+++ source/API/SBError.cpp
@@ -136,7 +136,9 @@
   return num_chars;
 }
 
-bool SBError::IsValid() const { return m_opaque_up != NULL; }
+bool SBError::IsValid() const { return bool(*this); }
+
+SBError::operator bool() const { return m_opaque_up != NULL; }
 
 void SBError::CreateIfNeeded() {
   if (m_opaque_up == NULL)
Index: source/API/SBEvent.cpp
===================================================================
--- source/API/SBEvent.cpp
+++ source/API/SBEvent.cpp
@@ -144,7 +144,9 @@
   m_event_sp.reset();
 }
 
-bool SBEvent::IsValid() const {
+bool SBEvent::IsValid() const { return bool(*this); }
+
+SBEvent::operator bool() const {
   // Do NOT use m_opaque_ptr directly!!! Must use the SBEvent::get() accessor.
   // See comments in SBEvent::get()....
   return SBEvent::get() != NULL;
Index: source/API/SBFileSpec.cpp
===================================================================
--- source/API/SBFileSpec.cpp
+++ source/API/SBFileSpec.cpp
@@ -49,7 +49,9 @@
   return *this;
 }
 
-bool SBFileSpec::IsValid() const { return m_opaque_up->operator bool(); }
+bool SBFileSpec::IsValid() const { return bool(*this); }
+
+SBFileSpec::operator bool() const { return m_opaque_up->operator bool(); }
 
 bool SBFileSpec::Exists() const {
   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
Index: source/API/SBFrame.cpp
===================================================================
--- source/API/SBFrame.cpp
+++ source/API/SBFrame.cpp
@@ -87,7 +87,9 @@
   return m_opaque_sp->SetFrameSP(lldb_object_sp);
 }
 
-bool SBFrame::IsValid() const {
+bool SBFrame::IsValid() const { return bool(*this); }
+
+SBFrame::operator bool() const {
   std::unique_lock<std::recursive_mutex> lock;
   ExecutionContext exe_ctx(m_opaque_sp.get(), lock);
 
Index: source/API/SBFunction.cpp
===================================================================
--- source/API/SBFunction.cpp
+++ source/API/SBFunction.cpp
@@ -37,7 +37,9 @@
 
 SBFunction::~SBFunction() { m_opaque_ptr = NULL; }
 
-bool SBFunction::IsValid() const { return m_opaque_ptr != NULL; }
+bool SBFunction::IsValid() const { return bool(*this); }
+
+SBFunction::operator bool() const { return m_opaque_ptr != NULL; }
 
 const char *SBFunction::GetName() const {
   const char *cstr = NULL;
Index: source/API/SBInstruction.cpp
===================================================================
--- source/API/SBInstruction.cpp
+++ source/API/SBInstruction.cpp
@@ -83,7 +83,11 @@
 
 SBInstruction::~SBInstruction() {}
 
-bool SBInstruction::IsValid() { return m_opaque_sp && m_opaque_sp->IsValid(); }
+bool SBInstruction::IsValid() { return bool(*this); }
+
+SBInstruction::operator bool() const {
+  return m_opaque_sp && m_opaque_sp->IsValid();
+}
 
 SBAddress SBInstruction::GetAddress() {
   SBAddress sb_addr;
Index: source/API/SBInstructionList.cpp
===================================================================
--- source/API/SBInstructionList.cpp
+++ source/API/SBInstructionList.cpp
@@ -32,7 +32,9 @@
 
 SBInstructionList::~SBInstructionList() {}
 
-bool SBInstructionList::IsValid() const { return m_opaque_sp.get() != NULL; }
+bool SBInstructionList::IsValid() const { return bool(*this); }
+
+SBInstructionList::operator bool() const { return m_opaque_sp.get() != NULL; }
 
 size_t SBInstructionList::GetSize() {
   if (m_opaque_sp)
Index: source/API/SBLineEntry.cpp
===================================================================
--- source/API/SBLineEntry.cpp
+++ source/API/SBLineEntry.cpp
@@ -87,7 +87,9 @@
   return sb_address;
 }
 
-bool SBLineEntry::IsValid() const {
+bool SBLineEntry::IsValid() const { return bool(*this); }
+
+SBLineEntry::operator bool() const {
   return m_opaque_up.get() && m_opaque_up->IsValid();
 }
 
Index: source/API/SBListener.cpp
===================================================================
--- source/API/SBListener.cpp
+++ source/API/SBListener.cpp
@@ -47,7 +47,9 @@
 
 SBListener::~SBListener() {}
 
-bool SBListener::IsValid() const { return m_opaque_sp != nullptr; }
+bool SBListener::IsValid() const { return bool(*this); }
+
+SBListener::operator bool() const { return m_opaque_sp != nullptr; }
 
 void SBListener::AddEvent(const SBEvent &event) {
   EventSP &event_sp = event.GetSP();
Index: source/API/SBModule.cpp
===================================================================
--- source/API/SBModule.cpp
+++ source/API/SBModule.cpp
@@ -66,7 +66,9 @@
 
 SBModule::~SBModule() {}
 
-bool SBModule::IsValid() const { return m_opaque_sp.get() != NULL; }
+bool SBModule::IsValid() const { return bool(*this); }
+
+SBModule::operator bool() const { return m_opaque_sp.get() != NULL; }
 
 void SBModule::Clear() { m_opaque_sp.reset(); }
 
Index: source/API/SBModuleSpec.cpp
===================================================================
--- source/API/SBModuleSpec.cpp
+++ source/API/SBModuleSpec.cpp
@@ -30,7 +30,9 @@
 
 SBModuleSpec::~SBModuleSpec() {}
 
-bool SBModuleSpec::IsValid() const { return m_opaque_up->operator bool(); }
+bool SBModuleSpec::IsValid() const { return bool(*this); }
+
+SBModuleSpec::operator bool() const { return m_opaque_up->operator bool(); }
 
 void SBModuleSpec::Clear() { m_opaque_up->Clear(); }
 
Index: source/API/SBPlatform.cpp
===================================================================
--- source/API/SBPlatform.cpp
+++ source/API/SBPlatform.cpp
@@ -215,7 +215,9 @@
 
 SBPlatform::~SBPlatform() {}
 
-bool SBPlatform::IsValid() const { return m_opaque_sp.get() != NULL; }
+bool SBPlatform::IsValid() const { return bool(*this); }
+
+SBPlatform::operator bool() const { return m_opaque_sp.get() != NULL; }
 
 void SBPlatform::Clear() { m_opaque_sp.reset(); }
 
Index: source/API/SBProcess.cpp
===================================================================
--- source/API/SBProcess.cpp
+++ source/API/SBProcess.cpp
@@ -96,7 +96,9 @@
 
 void SBProcess::Clear() { m_opaque_wp.reset(); }
 
-bool SBProcess::IsValid() const {
+bool SBProcess::IsValid() const { return bool(*this); }
+
+SBProcess::operator bool() const {
   ProcessSP process_sp(m_opaque_wp.lock());
   return ((bool)process_sp && process_sp->IsValid());
 }
Index: source/API/SBProcessInfo.cpp
===================================================================
--- source/API/SBProcessInfo.cpp
+++ source/API/SBProcessInfo.cpp
@@ -45,7 +45,9 @@
   ref() = proc_info_ref;
 }
 
-bool SBProcessInfo::IsValid() const { return m_opaque_up != nullptr; }
+bool SBProcessInfo::IsValid() const { return bool(*this); }
+
+SBProcessInfo::operator bool() const { return m_opaque_up != nullptr; }
 
 const char *SBProcessInfo::GetName() {
   const char *name = nullptr;
Index: source/API/SBQueue.cpp
===================================================================
--- source/API/SBQueue.cpp
+++ source/API/SBQueue.cpp
@@ -250,7 +250,9 @@
 
 SBQueue::~SBQueue() {}
 
-bool SBQueue::IsValid() const {
+bool SBQueue::IsValid() const { return bool(*this); }
+
+SBQueue::operator bool() const {
   bool is_valid = m_opaque_sp->IsValid();
   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
   if (log)
Index: source/API/SBQueueItem.cpp
===================================================================
--- source/API/SBQueueItem.cpp
+++ source/API/SBQueueItem.cpp
@@ -33,7 +33,9 @@
 //----------------------------------------------------------------------
 SBQueueItem::~SBQueueItem() { m_queue_item_sp.reset(); }
 
-bool SBQueueItem::IsValid() const {
+bool SBQueueItem::IsValid() const { return bool(*this); }
+
+SBQueueItem::operator bool() const {
   bool is_valid = m_queue_item_sp.get() != NULL;
   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
   if (log)
Index: source/API/SBSection.cpp
===================================================================
--- source/API/SBSection.cpp
+++ source/API/SBSection.cpp
@@ -39,7 +39,9 @@
 
 SBSection::~SBSection() {}
 
-bool SBSection::IsValid() const {
+bool SBSection::IsValid() const { return bool(*this); }
+
+SBSection::operator bool() const {
   SectionSP section_sp(GetSP());
   return section_sp && section_sp->GetModule().get() != NULL;
 }
Index: source/API/SBStream.cpp
===================================================================
--- source/API/SBStream.cpp
+++ source/API/SBStream.cpp
@@ -24,7 +24,9 @@
 
 SBStream::~SBStream() {}
 
-bool SBStream::IsValid() const { return (m_opaque_up != NULL); }
+bool SBStream::IsValid() const { return bool(*this); }
+
+SBStream::operator bool() const { return (m_opaque_up != NULL); }
 
 // If this stream is not redirected to a file, it will maintain a local cache
 // for the stream data which can be accessed using this accessor.
Index: source/API/SBStringList.cpp
===================================================================
--- source/API/SBStringList.cpp
+++ source/API/SBStringList.cpp
@@ -46,7 +46,9 @@
   return *m_opaque_up;
 }
 
-bool SBStringList::IsValid() const { return (m_opaque_up != NULL); }
+bool SBStringList::IsValid() const { return bool(*this); }
+
+SBStringList::operator bool() const { return (m_opaque_up != NULL); }
 
 void SBStringList::AppendString(const char *str) {
   if (str != NULL) {
Index: source/API/SBStructuredData.cpp
===================================================================
--- source/API/SBStructuredData.cpp
+++ source/API/SBStructuredData.cpp
@@ -54,7 +54,9 @@
   return error;
 }
 
-bool SBStructuredData::IsValid() const { return m_impl_up->IsValid(); }
+bool SBStructuredData::IsValid() const { return bool(*this); }
+
+SBStructuredData::operator bool() const { return m_impl_up->IsValid(); }
 
 void SBStructuredData::Clear() { m_impl_up->Clear(); }
 
Index: source/API/SBSymbol.cpp
===================================================================
--- source/API/SBSymbol.cpp
+++ source/API/SBSymbol.cpp
@@ -37,7 +37,9 @@
   m_opaque_ptr = lldb_object_ptr;
 }
 
-bool SBSymbol::IsValid() const { return m_opaque_ptr != NULL; }
+bool SBSymbol::IsValid() const { return bool(*this); }
+
+SBSymbol::operator bool() const { return m_opaque_ptr != NULL; }
 
 const char *SBSymbol::GetName() const {
   const char *name = NULL;
Index: source/API/SBSymbolContext.cpp
===================================================================
--- source/API/SBSymbolContext.cpp
+++ source/API/SBSymbolContext.cpp
@@ -55,7 +55,9 @@
   }
 }
 
-bool SBSymbolContext::IsValid() const { return m_opaque_up != NULL; }
+bool SBSymbolContext::IsValid() const { return bool(*this); }
+
+SBSymbolContext::operator bool() const { return m_opaque_up != NULL; }
 
 SBModule SBSymbolContext::GetModule() {
   Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_API));
Index: source/API/SBSymbolContextList.cpp
===================================================================
--- source/API/SBSymbolContextList.cpp
+++ source/API/SBSymbolContextList.cpp
@@ -61,7 +61,9 @@
     m_opaque_up->Append(*sc_list);
 }
 
-bool SBSymbolContextList::IsValid() const { return m_opaque_up != NULL; }
+bool SBSymbolContextList::IsValid() const { return bool(*this); }
+
+SBSymbolContextList::operator bool() const { return m_opaque_up != NULL; }
 
 lldb_private::SymbolContextList *SBSymbolContextList::operator->() const {
   return m_opaque_up.get();
Index: source/API/SBTarget.cpp
===================================================================
--- source/API/SBTarget.cpp
+++ source/API/SBTarget.cpp
@@ -141,7 +141,9 @@
   return Target::GetStaticBroadcasterClass().AsCString();
 }
 
-bool SBTarget::IsValid() const {
+bool SBTarget::IsValid() const { return bool(*this); }
+
+SBTarget::operator bool() const {
   return m_opaque_sp.get() != NULL && m_opaque_sp->IsValid();
 }
 
Index: source/API/SBThread.cpp
===================================================================
--- source/API/SBThread.cpp
+++ source/API/SBThread.cpp
@@ -108,7 +108,9 @@
   return sb_queue;
 }
 
-bool SBThread::IsValid() const {
+bool SBThread::IsValid() const { return bool(*this); }
+
+SBThread::operator bool() const {
   std::unique_lock<std::recursive_mutex> lock;
   ExecutionContext exe_ctx(m_opaque_sp.get(), lock);
 
Index: source/API/SBThreadCollection.cpp
===================================================================
--- source/API/SBThreadCollection.cpp
+++ source/API/SBThreadCollection.cpp
@@ -50,7 +50,9 @@
   return m_opaque_sp;
 }
 
-bool SBThreadCollection::IsValid() const { return m_opaque_sp.get() != NULL; }
+bool SBThreadCollection::IsValid() const { return bool(*this); }
+
+SBThreadCollection::operator bool() const { return m_opaque_sp.get() != NULL; }
 
 size_t SBThreadCollection::GetSize() {
   if (m_opaque_sp)
Index: source/API/SBThreadPlan.cpp
===================================================================
--- source/API/SBThreadPlan.cpp
+++ source/API/SBThreadPlan.cpp
@@ -79,6 +79,8 @@
 
 lldb_private::ThreadPlan *SBThreadPlan::get() { return m_opaque_sp.get(); }
 
+bool SBThreadPlan::IsValid() { return bool(*this); }
+
 bool SBThreadPlan::IsValid() const { return m_opaque_sp.get() != NULL; }
 
 void SBThreadPlan::Clear() { m_opaque_sp.reset(); }
@@ -128,7 +130,7 @@
     return true;
 }
 
-bool SBThreadPlan::IsValid() {
+SBThreadPlan::operator bool() const {
   if (m_opaque_sp)
     return m_opaque_sp->ValidatePlan(nullptr);
   else
Index: source/API/SBTrace.cpp
===================================================================
--- source/API/SBTrace.cpp
+++ source/API/SBTrace.cpp
@@ -101,7 +101,9 @@
 
 void SBTrace::SetSP(const ProcessSP &process_sp) { m_opaque_wp = process_sp; }
 
-bool SBTrace::IsValid() {
+bool SBTrace::IsValid() { return bool(*this); }
+
+SBTrace::operator bool() const {
   if (!m_trace_impl_sp)
     return false;
   if (!GetSP())
Index: source/API/SBTraceOptions.cpp
===================================================================
--- source/API/SBTraceOptions.cpp
+++ source/API/SBTraceOptions.cpp
@@ -77,7 +77,9 @@
     m_traceoptions_sp->setMetaDataBufferSize(size);
 }
 
-bool SBTraceOptions::IsValid() {
+bool SBTraceOptions::IsValid() { return bool(*this); }
+
+SBTraceOptions::operator bool() const {
   if (m_traceoptions_sp)
     return true;
   return false;
Index: source/API/SBType.cpp
===================================================================
--- source/API/SBType.cpp
+++ source/API/SBType.cpp
@@ -96,7 +96,9 @@
   return *m_opaque_sp;
 }
 
-bool SBType::IsValid() const {
+bool SBType::IsValid() const { return bool(*this); }
+
+SBType::operator bool() const {
   if (m_opaque_sp.get() == NULL)
     return false;
 
@@ -453,7 +455,9 @@
     Append(const_cast<SBTypeList &>(rhs).GetTypeAtIndex(i));
 }
 
-bool SBTypeList::IsValid() { return (m_opaque_up != NULL); }
+bool SBTypeList::IsValid() { return bool(*this); }
+
+SBTypeList::operator bool() const { return (m_opaque_up != NULL); }
 
 SBTypeList &SBTypeList::operator=(const SBTypeList &rhs) {
   if (this != &rhs) {
@@ -499,7 +503,9 @@
   return *this;
 }
 
-bool SBTypeMember::IsValid() const { return m_opaque_up.get(); }
+bool SBTypeMember::IsValid() const { return bool(*this); }
+
+SBTypeMember::operator bool() const { return m_opaque_up.get(); }
 
 const char *SBTypeMember::GetName() {
   if (m_opaque_up)
@@ -594,7 +600,9 @@
   return *this;
 }
 
-bool SBTypeMemberFunction::IsValid() const { return m_opaque_sp.get(); }
+bool SBTypeMemberFunction::IsValid() const { return bool(*this); }
+
+SBTypeMemberFunction::operator bool() const { return m_opaque_sp.get(); }
 
 const char *SBTypeMemberFunction::GetName() {
   if (m_opaque_sp)
Index: source/API/SBTypeCategory.cpp
===================================================================
--- source/API/SBTypeCategory.cpp
+++ source/API/SBTypeCategory.cpp
@@ -37,7 +37,9 @@
 
 SBTypeCategory::~SBTypeCategory() {}
 
-bool SBTypeCategory::IsValid() const { return (m_opaque_sp.get() != NULL); }
+bool SBTypeCategory::IsValid() const { return bool(*this); }
+
+SBTypeCategory::operator bool() const { return (m_opaque_sp.get() != NULL); }
 
 bool SBTypeCategory::GetEnabled() {
   if (!IsValid())
Index: source/API/SBTypeEnumMember.cpp
===================================================================
--- source/API/SBTypeEnumMember.cpp
+++ source/API/SBTypeEnumMember.cpp
@@ -42,7 +42,9 @@
   return *this;
 }
 
-bool SBTypeEnumMember::IsValid() const { return m_opaque_sp.get(); }
+bool SBTypeEnumMember::IsValid() const { return bool(*this); }
+
+SBTypeEnumMember::operator bool() const { return m_opaque_sp.get(); }
 
 const char *SBTypeEnumMember::GetName() {
   if (m_opaque_sp.get())
@@ -95,7 +97,9 @@
     Append(const_cast<SBTypeEnumMemberList &>(rhs).GetTypeEnumMemberAtIndex(i));
 }
 
-bool SBTypeEnumMemberList::IsValid() { return (m_opaque_up != NULL); }
+bool SBTypeEnumMemberList::IsValid() { return bool(*this); }
+
+SBTypeEnumMemberList::operator bool() const { return (m_opaque_up != NULL); }
 
 SBTypeEnumMemberList &SBTypeEnumMemberList::
 operator=(const SBTypeEnumMemberList &rhs) {
Index: source/API/SBTypeFilter.cpp
===================================================================
--- source/API/SBTypeFilter.cpp
+++ source/API/SBTypeFilter.cpp
@@ -26,7 +26,9 @@
 
 SBTypeFilter::~SBTypeFilter() {}
 
-bool SBTypeFilter::IsValid() const { return m_opaque_sp.get() != NULL; }
+bool SBTypeFilter::IsValid() const { return bool(*this); }
+
+SBTypeFilter::operator bool() const { return m_opaque_sp.get() != NULL; }
 
 uint32_t SBTypeFilter::GetOptions() {
   if (IsValid())
Index: source/API/SBTypeFormat.cpp
===================================================================
--- source/API/SBTypeFormat.cpp
+++ source/API/SBTypeFormat.cpp
@@ -31,7 +31,9 @@
 
 SBTypeFormat::~SBTypeFormat() {}
 
-bool SBTypeFormat::IsValid() const { return m_opaque_sp.get() != NULL; }
+bool SBTypeFormat::IsValid() const { return bool(*this); }
+
+SBTypeFormat::operator bool() const { return m_opaque_sp.get() != NULL; }
 
 lldb::Format SBTypeFormat::GetFormat() {
   if (IsValid() && m_opaque_sp->GetType() == TypeFormatImpl::Type::eTypeFormat)
Index: source/API/SBTypeNameSpecifier.cpp
===================================================================
--- source/API/SBTypeNameSpecifier.cpp
+++ source/API/SBTypeNameSpecifier.cpp
@@ -36,7 +36,9 @@
 
 SBTypeNameSpecifier::~SBTypeNameSpecifier() {}
 
-bool SBTypeNameSpecifier::IsValid() const { return m_opaque_sp.get() != NULL; }
+bool SBTypeNameSpecifier::IsValid() const { return bool(*this); }
+
+SBTypeNameSpecifier::operator bool() const { return m_opaque_sp.get() != NULL; }
 
 const char *SBTypeNameSpecifier::GetName() {
   if (!IsValid())
Index: source/API/SBTypeSummary.cpp
===================================================================
--- source/API/SBTypeSummary.cpp
+++ source/API/SBTypeSummary.cpp
@@ -31,7 +31,9 @@
 
 SBTypeSummaryOptions::~SBTypeSummaryOptions() {}
 
-bool SBTypeSummaryOptions::IsValid() { return m_opaque_up.get(); }
+bool SBTypeSummaryOptions::IsValid() { return bool(*this); }
+
+SBTypeSummaryOptions::operator bool() const { return m_opaque_up.get(); }
 
 lldb::LanguageType SBTypeSummaryOptions::GetLanguage() {
   if (IsValid())
@@ -146,7 +148,9 @@
 
 SBTypeSummary::~SBTypeSummary() {}
 
-bool SBTypeSummary::IsValid() const { return m_opaque_sp.get() != NULL; }
+bool SBTypeSummary::IsValid() const { return bool(*this); }
+
+SBTypeSummary::operator bool() const { return m_opaque_sp.get() != NULL; }
 
 bool SBTypeSummary::IsFunctionCode() {
   if (!IsValid())
Index: source/API/SBTypeSynthetic.cpp
===================================================================
--- source/API/SBTypeSynthetic.cpp
+++ source/API/SBTypeSynthetic.cpp
@@ -41,7 +41,9 @@
 
 SBTypeSynthetic::~SBTypeSynthetic() {}
 
-bool SBTypeSynthetic::IsValid() const { return m_opaque_sp.get() != NULL; }
+bool SBTypeSynthetic::IsValid() const { return bool(*this); }
+
+SBTypeSynthetic::operator bool() const { return m_opaque_sp.get() != NULL; }
 
 bool SBTypeSynthetic::IsClassCode() {
   if (!IsValid())
Index: source/API/SBUnixSignals.cpp
===================================================================
--- source/API/SBUnixSignals.cpp
+++ source/API/SBUnixSignals.cpp
@@ -45,7 +45,9 @@
 
 void SBUnixSignals::Clear() { m_opaque_wp.reset(); }
 
-bool SBUnixSignals::IsValid() const { return static_cast<bool>(GetSP()); }
+bool SBUnixSignals::IsValid() const { return bool(*this); }
+
+SBUnixSignals::operator bool() const { return static_cast<bool>(GetSP()); }
 
 const char *SBUnixSignals::GetSignalAsCString(int32_t signo) const {
   if (auto signals_sp = GetSP())
Index: source/API/SBValue.cpp
===================================================================
--- source/API/SBValue.cpp
+++ source/API/SBValue.cpp
@@ -234,7 +234,9 @@
 
 SBValue::~SBValue() {}
 
-bool SBValue::IsValid() {
+bool SBValue::IsValid() { return bool(*this); }
+
+SBValue::operator bool() const {
   // If this function ever changes to anything that does more than just check
   // if the opaque shared pointer is non NULL, then we need to update all "if
   // (m_opaque_sp)" code in this file.
Index: source/API/SBValueList.cpp
===================================================================
--- source/API/SBValueList.cpp
+++ source/API/SBValueList.cpp
@@ -98,7 +98,9 @@
 
 SBValueList::~SBValueList() {}
 
-bool SBValueList::IsValid() const { return (m_opaque_up != NULL); }
+bool SBValueList::IsValid() const { return bool(*this); }
+
+SBValueList::operator bool() const { return (m_opaque_up != NULL); }
 
 void SBValueList::Clear() { m_opaque_up.reset(); }
 
Index: source/API/SBVariablesOptions.cpp
===================================================================
--- source/API/SBVariablesOptions.cpp
+++ source/API/SBVariablesOptions.cpp
@@ -93,7 +93,9 @@
 
 SBVariablesOptions::~SBVariablesOptions() = default;
 
-bool SBVariablesOptions::IsValid() const { return m_opaque_up != nullptr; }
+bool SBVariablesOptions::IsValid() const { return bool(*this); }
+
+SBVariablesOptions::operator bool() const { return m_opaque_up != nullptr; }
 
 bool SBVariablesOptions::GetIncludeArguments() const {
   return m_opaque_up->GetIncludeArguments();
Index: source/API/SBWatchpoint.cpp
===================================================================
--- source/API/SBWatchpoint.cpp
+++ source/API/SBWatchpoint.cpp
@@ -69,7 +69,9 @@
   return watch_id;
 }
 
-bool SBWatchpoint::IsValid() const { return bool(m_opaque_wp.lock()); }
+bool SBWatchpoint::IsValid() const { return bool(*this); }
+
+SBWatchpoint::operator bool() const { return bool(m_opaque_wp.lock()); }
 
 SBError SBWatchpoint::GetError() {
   SBError sb_error;