Handled base "setters" overridden in derived types with a getter.

src/Generator/Passes/GetterSetterToPropertyPass.cs

@@ -152,10 +152,6 @@ namespace CppSharp.Passes
                 if (getter.IsOverride || (setter != null && setter.IsOverride))
                 {
                     var baseVirtualProperty = type.GetBaseProperty(property, getTopmost: true);
-                    if (baseVirtualProperty == null && type.GetBaseMethod(getter, getTopmost: true).IsGenerated)
-                        throw new Exception(string.Format(
-                            "Property {0} has a base property null but its getter has a generated base method.",
-                            getter.QualifiedOriginalName));
                     if (baseVirtualProperty != null && !baseVirtualProperty.IsVirtual)
                     {
                         // the only way the above can happen is if we are generating properties in abstract implementations
@@ -166,7 +162,7 @@ namespace CppSharp.Passes
                             "Base of property {0} is not virtual while the getter is.",
                             getter.QualifiedOriginalName));
                     }
-                    if (baseVirtualProperty != null && baseVirtualProperty.SetMethod == null)
+                    if (baseVirtualProperty == null || baseVirtualProperty.SetMethod == null)
                         setter = null;
                 }
                 property.GetMethod = getter;

tests/CSharp/CSharp.Tests.cs

@@ -667,6 +667,17 @@ public unsafe class CSharpTests : GeneratorTestFixture
         }
     }
 
+    [Test]
+    public void TestOverriddenSetterOnly()
+    {
+        using (var hasGetterAndOverriddenSetter = new HasGetterAndOverriddenSetter())
+        {
+            const int value = 5;
+            hasGetterAndOverriddenSetter.SetBaseSetter(value);
+            Assert.That(hasGetterAndOverriddenSetter.BaseSetter, Is.EqualTo(value));
+        }
+    }
+
     private class OverrideVirtualWithString : HasVirtualTakesReturnsProblematicTypes
     {
         public override string VirtualTakesAndReturnsString(string c)

tests/CSharp/CSharp.cpp

@@ -1266,3 +1266,33 @@ int ImplementsAbstractsFromPrimaryAndSecondary::abstractReturnsFieldInSecondaryB
 {
     return field + 2;
 }
+
+HasBaseSetter::HasBaseSetter()
+{
+}
+
+HasBaseSetter::~HasBaseSetter()
+{
+}
+
+void HasBaseSetter::setBaseSetter(int value)
+{
+}
+
+HasGetterAndOverriddenSetter::HasGetterAndOverriddenSetter()
+{
+}
+
+HasGetterAndOverriddenSetter::~HasGetterAndOverriddenSetter()
+{
+}
+
+int HasGetterAndOverriddenSetter::baseSetter()
+{
+    return field;
+}
+
+void HasGetterAndOverriddenSetter::setBaseSetter(int value)
+{
+    field = value;
+}

tests/CSharp/CSharp.h

@@ -1123,3 +1123,22 @@ public:
 private:
     int field;
 };
+
+class DLL_API HasBaseSetter
+{
+public:
+    HasBaseSetter();
+    ~HasBaseSetter();
+    virtual void setBaseSetter(int value);
+};
+
+class DLL_API HasGetterAndOverriddenSetter : public HasBaseSetter
+{
+public:
+    HasGetterAndOverriddenSetter();
+    ~HasGetterAndOverriddenSetter();
+    void setBaseSetter(int value);
+    int baseSetter();
+protected:
+    int field;
+};