Fixed the generated C# for const void*& in parameters.

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

src/Generator/Generators/CSharp/CSharpMarshal.cs

@@ -614,7 +614,18 @@ namespace CppSharp.Generators.CSharp
                         Context.Return.Write($"({typePrinter.PrintNative(pointer)}) ");
 
                     if (qualifiedPointer.IsConstRefToPrimitive())
+                    {
+                        if (primitive == PrimitiveType.Void && pointee.IsAddress())
+                        {
+                            string ptr = $@"{Helpers.PtrIdentifier}{
+                                Context.ParameterIndex}";
+                            Context.Before.WriteLine($@"var {ptr} = {
+                                Context.Parameter.Name}.ToPointer();");
+                            Context.Return.Write($"&{ptr}");
+                            return true;
+                        }
                         Context.Return.Write("&");
+                    }
                     Context.Return.Write(Context.Parameter.Name);
                 }
 

src/Generator/Generators/CodeGenerator.cs

@@ -523,6 +523,7 @@ namespace CppSharp.Generators
         public static readonly string DummyIdentifier = Generator.GeneratedIdentifier("dummy");
         public static readonly string TargetIdentifier = Generator.GeneratedIdentifier("target");
         public static readonly string SlotIdentifier = Generator.GeneratedIdentifier("slot");
+        public static readonly string PtrIdentifier = Generator.GeneratedIdentifier("ptr");
 
         public static readonly string OwnsNativeInstanceIdentifier = Generator.GeneratedIdentifier("ownsNativeInstance");
 

tests/Common/Common.cpp

@@ -1006,3 +1006,7 @@ void integerOverload(long i)
 void integerOverload(unsigned long i)
 {
 }
+
+void takeReferenceToVoidStar(const void*& p)
+{
+}

tests/Common/Common.h

@@ -1480,3 +1480,4 @@ DLL_API void integerOverload(int i);
 DLL_API void integerOverload(unsigned int i);
 DLL_API void integerOverload(long i);
 DLL_API void integerOverload(unsigned long i);
+DLL_API void takeReferenceToVoidStar(const void*& p);