Added better support for nullptr_t types.

src/Generator/Generators/CLI/CLIMarshal.cs

@@ -146,11 +146,12 @@ namespace CppSharp.Generators.CLI
                 case PrimitiveType.UInt64:
                 case PrimitiveType.Float:
                 case PrimitiveType.Double:
+                case PrimitiveType.Null:
                     Context.Return.Write(Context.ReturnVarName);
                     return true;
             }
 
-            return false;
+            throw new NotSupportedException();
         }
 
         public override bool VisitTypedefType(TypedefType typedef, TypeQualifiers quals)

src/Generator/Generators/CLI/CLITypePrinter.cs

@@ -201,6 +201,7 @@ namespace CppSharp.Generators.CLI
                 case PrimitiveType.Double: return "double";
                 case PrimitiveType.IntPtr: return "IntPtr";
                 case PrimitiveType.UIntPtr: return "UIntPtr";
+                case PrimitiveType.Null: return "void*";
             }
 
             throw new NotSupportedException();

src/Generator/Generators/CSharp/CSharpMarshal.cs

@@ -198,6 +198,7 @@ namespace CppSharp.Generators.CSharp
                 case PrimitiveType.Float:
                 case PrimitiveType.Double:
                 case PrimitiveType.WideChar:
+                case PrimitiveType.Null:
                     Context.Return.Write(Context.ReturnVarName);
                     return true;
                 case PrimitiveType.Char16:

src/Generator/Generators/CSharp/CSharpTypePrinter.cs

@@ -399,6 +399,7 @@ namespace CppSharp.Generators.CSharp
                 case PrimitiveType.Double: return "double";
                 case PrimitiveType.IntPtr: return "global::System.IntPtr";
                 case PrimitiveType.UIntPtr: return "global::System.UIntPtr";
+                case PrimitiveType.Null: return "void*";
             }
 
             throw new NotSupportedException();

src/Generator/Types/CppTypePrinter.cs

@@ -114,6 +114,7 @@ namespace CppSharp.Types
                 case PrimitiveType.Double: return "double";
                 case PrimitiveType.IntPtr: return "void*";
                 case PrimitiveType.UIntPtr: return "uintptr_t";
+                case PrimitiveType.Null: return "std::nullptr_t";
             }
 
             throw new NotSupportedException();

src/Generator/Types/Std/Stdlib.cs

@@ -1,6 +1,7 @@
 using CppSharp.AST;
 using CppSharp.AST.Extensions;
 using CppSharp.Generators;
+using CppSharp.Generators.AST;
 using CppSharp.Generators.CLI;
 using CppSharp.Generators.CSharp;
 
@@ -312,4 +313,24 @@ namespace CppSharp.Types.Std
                 marshalCtxName, ctx.Parameter.Name);
         }
     }
+
+    [TypeMap("std::nullptr_t")]
+    public class NullPtr : TypeMap
+    {
+        public override bool DoesMarshalling { get { return false; } }
+
+        public override void CLITypeReference(CLITypeReferenceCollector collector,
+            ASTRecord<Declaration> loc)
+        {
+            var typeRef = collector.GetTypeReference(loc.Value);
+
+            var include = new Include
+            {
+                File = "cstddef",
+                Kind = Include.IncludeKind.Angled,
+            };
+
+            typeRef.Include = include;
+        }
+    }
 }

src/Generator/Types/Types.cs

@@ -114,6 +114,17 @@ namespace CppSharp
             return base.VisitMemberPointerType(member, quals);
         }
 
+        public override bool VisitParameterDecl(Parameter parameter)
+        {
+            if (parameter.Type.IsPrimitiveType(PrimitiveType.Null))
+            {
+                Ignore();
+                return false;
+            }
+
+            return base.VisitParameterDecl(parameter);
+        }
+
         public override bool VisitTemplateSpecializationType(
             TemplateSpecializationType template, TypeQualifiers quals)
         {

tests/Basic/Basic.Tests.cs

@@ -309,5 +309,12 @@ public class BasicTests : GeneratorTestFixture
         var ret = basic.TestDecltype();
         Assert.AreEqual(0, ret);
     }
+
+    [Test]
+    public unsafe void TestNullPtrType()
+    {
+        var ret = basic.TestNullPtrTypeRet();
+        Assert.AreEqual(IntPtr.Zero, new IntPtr(ret));
+    }
 }
  

tests/Basic/Basic.h

@@ -454,3 +454,12 @@ DLL_API decltype(Expr) TestDecltype()
 {
     return Expr;
 }
+
+DLL_API void TestNullPtrType(decltype(nullptr))
+{
+}
+
+DLL_API decltype(nullptr) TestNullPtrTypeRet()
+{
+    return nullptr;
+}