From c76b97bccee90727a419724d57fb270f08dc6f5f Mon Sep 17 00:00:00 2001
From: Enrico Granata <egranata@apple.com>
Date: Fri, 26 Apr 2013 00:59:02 +0000
Subject: [PATCH] Make a synthetic children provider for the ObjC Class type

llvm-svn: 180588
---
 .../DataFormatters/CXXFormatterFunctions.h    |  2 +
 .../DataFormatters/CXXFormatterFunctions.cpp  | 50 +++++++++++++++++++
 lldb/source/DataFormatters/FormatManager.cpp  |  5 ++
 3 files changed, 57 insertions(+)

diff --git a/lldb/include/lldb/DataFormatters/CXXFormatterFunctions.h b/lldb/include/lldb/DataFormatters/CXXFormatterFunctions.h
index 00f2be0ae3a8..fe5d69cc7b63 100644
--- a/lldb/include/lldb/DataFormatters/CXXFormatterFunctions.h
+++ b/lldb/include/lldb/DataFormatters/CXXFormatterFunctions.h
@@ -81,6 +81,8 @@ namespace lldb_private {
         bool
         ObjCClassSummaryProvider (ValueObject& valobj, Stream& stream);
         
+        SyntheticChildrenFrontEnd* ObjCClassSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP);
+        
         template<bool name_entries>
         bool
         NSDictionarySummaryProvider (ValueObject& valobj, Stream& stream);
diff --git a/lldb/source/DataFormatters/CXXFormatterFunctions.cpp b/lldb/source/DataFormatters/CXXFormatterFunctions.cpp
index 8f3c0ef02589..69e2f6a04dab 100644
--- a/lldb/source/DataFormatters/CXXFormatterFunctions.cpp
+++ b/lldb/source/DataFormatters/CXXFormatterFunctions.cpp
@@ -761,6 +761,56 @@ lldb_private::formatters::ObjCClassSummaryProvider (ValueObject& valobj, Stream&
     return true;
 }
 
+class ObjCClassSyntheticChildrenFrontEnd : public SyntheticChildrenFrontEnd
+{
+public:
+    ObjCClassSyntheticChildrenFrontEnd (lldb::ValueObjectSP valobj_sp) :
+    SyntheticChildrenFrontEnd(*valobj_sp.get())
+    {
+    }
+    
+    virtual size_t
+    CalculateNumChildren ()
+    {
+        return 0;
+    }
+    
+    virtual lldb::ValueObjectSP
+    GetChildAtIndex (size_t idx)
+    {
+        return lldb::ValueObjectSP();
+    }
+    
+    virtual bool
+    Update()
+    {
+        return false;
+    }
+    
+    virtual bool
+    MightHaveChildren ()
+    {
+        return false;
+    }
+    
+    virtual size_t
+    GetIndexOfChildWithName (const ConstString &name)
+    {
+        return UINT32_MAX;
+    }
+    
+    virtual
+    ~ObjCClassSyntheticChildrenFrontEnd ()
+    {
+    }
+};
+
+SyntheticChildrenFrontEnd*
+lldb_private::formatters::ObjCClassSyntheticFrontEndCreator (CXXSyntheticChildren*, lldb::ValueObjectSP valobj_sp)
+{
+    return new ObjCClassSyntheticChildrenFrontEnd(valobj_sp);
+}
+
 template<bool needs_at>
 bool
 lldb_private::formatters::NSDataSummaryProvider (ValueObject& valobj, Stream& stream)
diff --git a/lldb/source/DataFormatters/FormatManager.cpp b/lldb/source/DataFormatters/FormatManager.cpp
index adc3a9c31c45..ab10d96ad955 100644
--- a/lldb/source/DataFormatters/FormatManager.cpp
+++ b/lldb/source/DataFormatters/FormatManager.cpp
@@ -770,6 +770,11 @@ FormatManager::LoadObjCFormatters()
     AddCXXSummary(objc_category_sp, lldb_private::formatters::ObjCSELSummaryProvider<true>, "SEL summary provider", ConstString("SEL *"), objc_flags);
     
     AddCXXSummary(objc_category_sp, lldb_private::formatters::ObjCClassSummaryProvider, "Class summary provider", ConstString("Class"), objc_flags);
+    
+    SyntheticChildren::Flags class_synth_flags;
+    class_synth_flags.SetCascades(true).SetSkipPointers(false).SetSkipReferences(false);
+    
+    AddCXXSynthetic(objc_category_sp, lldb_private::formatters::ObjCClassSyntheticFrontEndCreator, "Class synthetic children", ConstString("Class"), class_synth_flags);
 #endif // LLDB_DISABLE_PYTHON
 
     objc_flags.SetSkipPointers(false);