ExpressionVariable now uses llvm::cast() instead of As...() for RTTI.

As part of our overall switch from hand-rolling RTTI to using LLVM-compatible
methods, I've done the same for ExpressionVariable.  The main documentation for
how to do this is in TypeSystem.h, so I've simply referred to that.

llvm-svn: 247085

1 files changed, 12 insertions, 7 deletions

diff --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionVariable.h b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionVariable.h
index ed3e908aa98..c38e6c040a7 100644
--- a/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionVariable.h
+++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangExpressionVariable.h
@@ -21,6 +21,8 @@
 #include <vector>
 
 // Other libraries and framework includes
+#include "llvm/Support/Casting.h"
+
 // Project includes
 #include "lldb/lldb-public.h"
 #include "lldb/Core/ClangForward.h"
@@ -71,12 +73,7 @@ public:
                              uint16_t flags = EVNone);
     
     ClangExpressionVariable(const lldb::ValueObjectSP &valobj_sp);
-    
-    ClangExpressionVariable *AsClangExpressionVariable() override
-    {
-        return this;
-    }
-    
+        
     //----------------------------------------------------------------------
     /// Utility functions for dealing with ExpressionVariableLists in Clang-specific ways
     //----------------------------------------------------------------------
@@ -98,7 +95,7 @@ public:
         {
             var_sp = list.GetVariableAtIndex(index);
             
-            if (ClangExpressionVariable *clang_var = var_sp->AsClangExpressionVariable())
+            if (ClangExpressionVariable *clang_var = llvm::dyn_cast<ClangExpressionVariable>(var_sp.get()))
             {
                 ClangExpressionVariable::ParserVars *parser_vars = clang_var->GetParserVars(parser_id);
                 
@@ -277,6 +274,14 @@ public:
     TypeFromUser
     GetTypeFromUser ();
     
+    //------------------------------------------------------------------
+    // llvm casting support
+    //------------------------------------------------------------------
+    static bool classof(const ExpressionVariable *ev)
+    {
+        return ev->getKind() == ExpressionVariable::eKindClang;
+    }
+    
     //----------------------------------------------------------------------
     /// Members
     //----------------------------------------------------------------------