Fixed the generated C# for arguments with default values of "nullptr".

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

src/Generator/Passes/HandleDefaultParamValuesPass.cs

@@ -67,7 +67,7 @@ namespace CppSharp.Passes
             var desugared = type.Desugar();
 
             if (!desugared.IsPrimitiveTypeConvertibleToRef() &&
-                expression.String == "0")
+                (expression.String == "0" || expression.String == "nullptr"))
             {
                 result = $"default({desugared})";
                 return true;

tests/CSharp/CSharp.cpp

@@ -548,7 +548,7 @@ MethodsWithDefaultValues::~MethodsWithDefaultValues()
 {
 }
 
-void MethodsWithDefaultValues::defaultPointer(Foo *ptr)
+void MethodsWithDefaultValues::defaultPointer(Foo *ptr1, Foo *ptr2)
 {
 }
 

tests/CSharp/CSharp.h

@@ -391,7 +391,7 @@ public:
     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 defaultPointer(Foo* ptr1 = 0, Foo* ptr2 = nullptr);
     void defaultVoidStar(void* ptr = 0);
     void defaultValueType(QGenericArgument valueType = QGenericArgument());
     void defaultChar(char c = 'a');