Add an option to suppress the persistent result variable when running EvaluateExpression

from Python.  If you don't need to refer to the result in another expression, there's no
need to bloat the persistent variable table with them since you already have the result
SBValue to work with.

<rdar://problem/17963645>

llvm-svn: 215244

lldb/include/lldb/API/SBExpressionOptions.h

@@ -98,6 +98,12 @@ public:
     
     void
     SetGenerateDebugInfo (bool b = true);
+    
+    bool
+    GetSuppressPersistentResult ();
+    
+    void
+    SetSuppressPersistentResult (bool b = false);
 
 protected:
 

lldb/scripts/Python/interface/SBExpressionOptions.i

@@ -102,6 +102,15 @@ public:
     %feature("docstring", "Sets whether to generate debug information for the expression and also controls if a SBModule is generated.") SetGenerateDebugInfo;
     void
     SetGenerateDebugInfo (bool b = true);
+    
+    bool
+    GetSuppressPersistentResult ();
+    
+    %feature("docstring", "Sets whether to produce a persistent result that can be used in future expressions.") SetSuppressPersistentResult;
+    void
+    SetSuppressPersistentResult (bool b = false);
+
+
 
 protected:
 

lldb/source/API/SBExpressionOptions.cpp

@@ -173,6 +173,19 @@ SBExpressionOptions::SetGenerateDebugInfo (bool b)
     return m_opaque_ap->SetGenerateDebugInfo(b);
 }
 
+bool
+SBExpressionOptions::GetSuppressPersistentResult ()
+{
+    return m_opaque_ap->GetResultIsInternal ();
+}
+
+void
+SBExpressionOptions::SetSuppressPersistentResult (bool b)
+{
+    return m_opaque_ap->SetResultIsInternal (b);
+}
+
+
 EvaluateExpressionOptions *
 SBExpressionOptions::get() const
 {