Replace the walkTypedefs parameter with Desugar() as it is more clean.

src/Bridge/Type.cs

@@ -13,8 +13,7 @@ namespace Cxxi
         {
         }
 
-        public bool IsPrimitiveType(out PrimitiveType primitive,
-            bool walkTypedefs = false)
+        public bool IsPrimitiveType(out PrimitiveType primitive)
         {
             var builtin = this as BuiltinType;
             if (builtin != null)
@@ -23,22 +22,14 @@ namespace Cxxi
                 return true;
             }
 
-            if (walkTypedefs)
-            {
-                var typedef = this as TypedefType;
-                if (typedef != null)
-                    return typedef.Declaration.Type.IsPrimitiveType(out primitive, true);
-            }
-
             primitive = PrimitiveType.Null;
             return false;
         }
 
-        public bool IsPrimitiveType(PrimitiveType primitive,
-            bool walkTypedefs = false)
+        public bool IsPrimitiveType(PrimitiveType primitive)
         {
             PrimitiveType type;
-            if (!IsPrimitiveType(out type, walkTypedefs))
+            if (!IsPrimitiveType(out type))
                 return false;
 
             return primitive == type;

src/Generator/Generators/CLI/CLIMarshal.cs

@@ -43,7 +43,7 @@ namespace Cxxi.Generators.CLI
         {
             var pointee = pointer.Pointee;
 
-            if (pointee.IsPrimitiveType(PrimitiveType.Void, walkTypedefs: true))
+            if (pointee.Desugar().IsPrimitiveType(PrimitiveType.Void))
             {
                 Context.Return.Write("IntPtr({0})", Context.ReturnVarName);
                 return true;
@@ -57,7 +57,7 @@ namespace Cxxi.Generators.CLI
             }
 
             PrimitiveType primitive;
-            if (pointee.IsPrimitiveType(out primitive, walkTypedefs: true))
+            if (pointee.Desugar().IsPrimitiveType(out primitive))
             {
                 Context.Return.Write("IntPtr({0})", Context.ReturnVarName);
                 return true;
@@ -325,11 +325,9 @@ namespace Cxxi.Generators.CLI
         {
             var pointee = pointer.Pointee;
 
-            var isVoidPtr = pointee.IsPrimitiveType(PrimitiveType.Void,
-                walkTypedefs: true);
+            var isVoidPtr = pointee.Desugar().IsPrimitiveType(PrimitiveType.Void);
 
-            var isUInt8Ptr = pointee.IsPrimitiveType(PrimitiveType.UInt8,
-                walkTypedefs: true);
+            var isUInt8Ptr = pointee.Desugar().IsPrimitiveType(PrimitiveType.UInt8);
 
             if (isVoidPtr || isUInt8Ptr)
             {
@@ -416,7 +414,7 @@ namespace Cxxi.Generators.CLI
             }
 
             PrimitiveType primitive;
-            if (decl.Type.IsPrimitiveType(out primitive, walkTypedefs: true))
+            if (decl.Type.Desugar().IsPrimitiveType(out primitive))
             {
                 Context.Return.Write("({0})", typedef.Declaration.Name);
             }

src/Generator/Generators/CLI/CLITypePrinter.cs

@@ -131,7 +131,7 @@ namespace Cxxi.Generators.CLI
             }
 
             PrimitiveType primitive;
-            if (pointee.IsPrimitiveType(out primitive, walkTypedefs: true))
+            if (pointee.Desugar().IsPrimitiveType(out primitive))
             {
                 return "System::IntPtr";
             }

src/Generator/Generators/CSharp/CSharpMarshal.cs

@@ -68,7 +68,7 @@ namespace Cxxi.Generators.CSharp
         {
             var pointee = pointer.Pointee;
 
-            if (pointee.IsPrimitiveType(PrimitiveType.Void, walkTypedefs: true))
+            if (pointee.Desugar().IsPrimitiveType(PrimitiveType.Void))
             {
                 Context.Return.Write("new IntPtr({0})", Context.ReturnVarName);
                 return true;
@@ -82,7 +82,7 @@ namespace Cxxi.Generators.CSharp
             }
 
             PrimitiveType primitive;
-            if (pointee.IsPrimitiveType(out primitive, walkTypedefs: true))
+            if (pointee.Desugar().IsPrimitiveType(out primitive))
             {
                 Context.Return.Write("new IntPtr({0})", Context.ReturnVarName);
                 return true;
@@ -273,11 +273,9 @@ namespace Cxxi.Generators.CSharp
         {
             var pointee = pointer.Pointee;
 
-            var isVoidPtr = pointee.IsPrimitiveType(PrimitiveType.Void,
-                walkTypedefs: true);
+            var isVoidPtr = pointee.Desugar().IsPrimitiveType(PrimitiveType.Void);
 
-            var isUInt8Ptr = pointee.IsPrimitiveType(PrimitiveType.UInt8,
-                walkTypedefs: true);
+            var isUInt8Ptr = pointee.Desugar().IsPrimitiveType(PrimitiveType.UInt8);
 
             if (isVoidPtr || isUInt8Ptr)
             {
@@ -373,7 +371,7 @@ namespace Cxxi.Generators.CSharp
             }
 
             PrimitiveType primitive;
-            if (decl.Type.IsPrimitiveType(out primitive, walkTypedefs: true))
+            if (decl.Type.Desugar().IsPrimitiveType(out primitive))
             {
                 Context.Return.Write("({0})", typedef.Declaration.Name);
             }

src/Generator/Generators/CSharp/CSharpTypePrinter.cs

@@ -109,8 +109,8 @@ namespace Cxxi.Generators.CSharp
 
             var isManagedContext = ContextKind == CSharpTypePrinterContextKind.Managed;
 
-            if (pointee.IsPrimitiveType(PrimitiveType.Void, walkTypedefs: true) ||
-                pointee.IsPrimitiveType(PrimitiveType.UInt8, walkTypedefs: true))
+            if (pointee.Desugar().IsPrimitiveType(PrimitiveType.Void) ||
+                pointee.Desugar().IsPrimitiveType(PrimitiveType.UInt8))
             {
                 return isManagedContext ? "string" : "System.IntPtr";
             }