Fixed the generated C# for a subclass of a specialisation of an unsupported template.

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

src/Generator/Passes/TrimSpecializationsPass.cs

@@ -51,18 +51,7 @@ namespace CppSharp.Passes
                 }
             }
             else
-                foreach (var @base in @class.Bases.Where(b => b.IsClass))
-                {
-                    var specialization = @base.Class as ClassTemplateSpecialization;
-                    if (specialization != null)
-                    {
-                        specializations.Add(specialization);
-                        foreach (var field in specialization.Fields)
-                            field.Visit(this);
-                        foreach (var method in specialization.Methods)
-                            method.Visit(this);
-                    }
-                }
+                CheckBasesForSpecialization(@class);
 
             return true;
         }
@@ -191,6 +180,23 @@ namespace CppSharp.Passes
                 CheckLayoutFields(@base);
         }
 
+        private void CheckBasesForSpecialization(Class @class)
+        {
+            foreach (var @base in @class.Bases.Where(b => b.IsClass))
+            {
+                var specialization = @base.Class as ClassTemplateSpecialization;
+                if (specialization != null)
+                {
+                    specializations.Add(specialization);
+                    foreach (var field in specialization.Fields)
+                        field.Visit(this);
+                    foreach (var method in specialization.Methods)
+                        method.Visit(this);
+                }
+                CheckBasesForSpecialization(@base.Class);
+            }
+        }
+
         private HashSet<ClassTemplateSpecialization> specializations = new HashSet<ClassTemplateSpecialization>();
         private HashSet<ClassTemplateSpecialization> internalSpecializations = new HashSet<ClassTemplateSpecialization>();
         private HashSet<Class> templates = new HashSet<Class>();

tests/CSharp/CSharp.Tests.cs

@@ -67,6 +67,9 @@ public unsafe class CSharpTests : GeneratorTestFixture
         {
             int i = typeMappedWithOperator | 5;
         }
+        using (Base<int> @base = new DerivedFromSpecializationOfUnsupportedTemplate())
+        {
+        }
 
 #pragma warning restore 0168
 #pragma warning restore 0219

tests/CSharp/CSharpTemplates.cpp

@@ -18,6 +18,14 @@ int T1::getField() const
     return field;
 }
 
+DerivedFromSpecializationOfUnsupportedTemplate::DerivedFromSpecializationOfUnsupportedTemplate()
+{
+}
+
+DerivedFromSpecializationOfUnsupportedTemplate::~DerivedFromSpecializationOfUnsupportedTemplate()
+{
+}
+
 HasDefaultTemplateArgument<bool, bool>::HasDefaultTemplateArgument()
 {
 }

tests/CSharp/CSharpTemplates.h

@@ -105,7 +105,12 @@ private:
 };
 
 template <typename T>
-class DLL_API DependentValueFields
+class DLL_API Base
+{
+};
+
+template <typename T>
+class DLL_API DependentValueFields : public Base<T>
 {
 public:
     class Nested
@@ -167,6 +172,13 @@ DependentValueFields<T> DependentValueFields<T>::operator+(const DependentValueF
     return sum;
 }
 
+class DLL_API DerivedFromSpecializationOfUnsupportedTemplate : public DependentValueFields<int>
+{
+public:
+    DerivedFromSpecializationOfUnsupportedTemplate();
+    ~DerivedFromSpecializationOfUnsupportedTemplate();
+};
+
 template <typename T>
 class DLL_API DependentPointerFields
 {
@@ -411,6 +423,7 @@ template class DLL_API IndependentFields<int>;
 template class DLL_API IndependentFields<bool>;
 template class DLL_API IndependentFields<T1>;
 template class DLL_API IndependentFields<std::string>;
+template class DLL_API Base<int>;
 template class DLL_API DependentValueFields<int>;
 template class DLL_API VirtualTemplate<int>;
 template class DLL_API VirtualTemplate<bool>;