Fixed the generated C# when a ref parameter is named after a keyword.

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

src/Generator/Generator.cs

@@ -143,10 +143,8 @@ namespace CppSharp.Generators
 
         protected abstract string TypePrinterDelegate(CppSharp.AST.Type type);
 
-        public static string GeneratedIdentifier(string id)
-        {
-            return "__" + id;
-        }
+        public static string GeneratedIdentifier(string id) =>
+            $"__{(id.StartsWith("@") ? id.Substring(1) : id)}";
 
         public void Dispose()
         {

tests/Common/Common.cpp

@@ -848,7 +848,7 @@ HasOverloadsWithDifferentPointerKindsToSameType::~HasOverloadsWithDifferentPoint
 {
 }
 
-void HasOverloadsWithDifferentPointerKindsToSameType::overload(int& i)
+void HasOverloadsWithDifferentPointerKindsToSameType::overload(int& in)
 {
 }
 

tests/Common/Common.h

@@ -1310,7 +1310,7 @@ class DLL_API HasOverloadsWithDifferentPointerKindsToSameType
 public:
     HasOverloadsWithDifferentPointerKindsToSameType();
     ~HasOverloadsWithDifferentPointerKindsToSameType();
-    void overload(int& i);
+    void overload(int& in);
     void overload(int&& i);
     void overload(const int& i);
     void overload(const Foo& rx, int from = -1);