Fixed the generated C# for setters with default parameters.

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

src/Generator/Generators/CSharp/CSharpSources.cs

@@ -2450,6 +2450,15 @@ namespace CppSharp.Generators.CSharp
 
         private void GenerateOverloadCall(Function function)
         {
+            if (function.OriginalFunction.GenerationKind == GenerationKind.Internal)
+            {
+                var property = ((Class) function.Namespace).Properties.First(
+                    p => p.SetMethod == function.OriginalFunction);
+                WriteLine($@"{property.Name} = {ExpressionPrinter.VisitParameter(
+                    function.Parameters.First(p => p.Kind == ParameterKind.Regular))};");
+                return;
+            }
+
             for (int i = 0, j = 0; i < function.Parameters.Count; i++)
             {
                 var parameter = function.Parameters[i];

src/Generator/Passes/HandleDefaultParamValuesPass.cs

@@ -140,8 +140,7 @@ namespace CppSharp.Passes
                 return true;
             }
 
-            result = "null";
-            return true;
+            return false;
         }
 
         private bool? CheckForDefaultConstruct(Type desugared, Expression expression,

tests/CSharp/CSharp.Tests.cs

@@ -63,6 +63,11 @@ public unsafe class CSharpTests : GeneratorTestFixture
         {
             new Bar(qux).Dispose();
         }
+        using (var quux = new Quux())
+        {
+            quux.SetterWithDefaultOverload = null;
+            quux.SetSetterWithDefaultOverload();
+        }
         using (ComplexType complexType = TestFlag.Flag1)
         {
         }

tests/CSharp/CSharp.cpp

@@ -98,27 +98,44 @@ const Foo& Bar::operator[](int i) const
 }
 
 
-Quux::Quux()
+Quux::Quux() : _setterWithDefaultOverload(0)
 {
 
 }
 
-Quux::Quux(int i)
+Quux::Quux(int i) : Quux()
 {
 
 }
 
-Quux::Quux(char c)
+Quux::Quux(char c) : Quux()
 {
 
 }
 
-Quux::Quux(Foo f)
+Quux::Quux(Foo f) : Quux()
 {
 
 }
 
+Quux::~Quux()
+{
+    if (_setterWithDefaultOverload)
+    {
+        delete _setterWithDefaultOverload;
+        _setterWithDefaultOverload = 0;
+    }
+}
+
+Foo* Quux::setterWithDefaultOverload()
+{
+    return _setterWithDefaultOverload;
+}
 
+void Quux::setSetterWithDefaultOverload(Foo* value)
+{
+    _setterWithDefaultOverload = value;
+}
 
 QColor::QColor()
 {
@@ -527,6 +544,10 @@ MethodsWithDefaultValues::MethodsWithDefaultValues(QRect* pointer, float f, int
 {
 }
 
+MethodsWithDefaultValues::~MethodsWithDefaultValues()
+{
+}
+
 void MethodsWithDefaultValues::defaultPointer(Foo *ptr)
 {
 }

tests/CSharp/CSharp.h

@@ -51,8 +51,14 @@ public:
     Quux(int i);
     Quux(char c);
     Quux(Foo f);
+    ~Quux();
+
+    Foo* setterWithDefaultOverload();
+    void setSetterWithDefaultOverload(Foo* value = new Foo());
+
 private:
     int priv;
+    Foo* _setterWithDefaultOverload;
 };
 
 class Bar;
@@ -384,6 +390,7 @@ public:
     MethodsWithDefaultValues(float a, Zero b = 0);
     MethodsWithDefaultValues(double d, QList<QColor> list = QList<QColor>());
     MethodsWithDefaultValues(QRect* pointer, float f = 1, int i = std::numeric_limits<double>::infinity());
+    ~MethodsWithDefaultValues();
     void defaultPointer(Foo* ptr = 0);
     void defaultVoidStar(void* ptr = 0);
     void defaultValueType(QGenericArgument valueType = QGenericArgument());