Generate valid C# for types nested in external typedef-ed specializations

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

src/Generator/Generators/CSharp/CSharpTypePrinter.cs

@@ -532,30 +532,22 @@ namespace CppSharp.Generators.CSharp
             return ret;
         }
 
-        string GetName(Declaration decl)
+        private string GetName(Declaration decl)
         {
             var names = new Stack<string>();
 
-            Declaration ctx;
-            if (decl is ClassTemplateSpecialization specialization)
+            Declaration ctx = decl;
+            if (decl is ClassTemplateSpecialization specialization &&
+                ContextKind == TypePrinterContextKind.Native &&
+                specialization.OriginalNamespace is Class &&
+                !(specialization.OriginalNamespace is ClassTemplateSpecialization))
             {
-                ctx = specialization.TemplatedDecl.TemplatedClass.Namespace;
-                if (ContextKind == TypePrinterContextKind.Native &&
-                    specialization.OriginalNamespace is Class &&
-                    !(specialization.OriginalNamespace is ClassTemplateSpecialization))
-                {
-                    names.Push(string.Format("{0}_{1}", decl.OriginalNamespace.Name, decl.Name));
-                    ctx = ctx.Namespace ?? ctx;
-                }
-                else
-                {
-                    names.Push(decl.Name);
-                }
+                names.Push(string.Format("{0}_{1}", decl.OriginalNamespace.Name, decl.Name));
+                ctx = ctx.Namespace ?? ctx;
             }
             else
             {
                 names.Push(decl.Name);
-                ctx = decl.Namespace;
             }
 
             if (decl is Variable && !(decl.Namespace is Class))
@@ -563,9 +555,11 @@ namespace CppSharp.Generators.CSharp
 
             while (!(ctx is TranslationUnit))
             {
-                AddContextName(names, ctx);
+                if (ctx is ClassTemplateSpecialization parentSpecialization)
+                    ctx = parentSpecialization.TemplatedDecl.TemplatedDecl;
 
                 ctx = ctx.Namespace;
+                AddContextName(names, ctx);
             }
 
             if (PrintModuleOutputNamespace)

tests/NamespacesBase/NamespacesBase.h

@@ -79,10 +79,14 @@ template <typename T>
 class TemplateWithIndependentFields
 {
 public:
-    void useDependentPointer(const T* t);
+    class Nested
+    {
+    };
+    Nested useDependentPointer(const T* t);
     const T& constField() const;
 private:
     T* t = new T;
+    Nested nested;
 };
 
 template <typename T>
@@ -92,8 +96,9 @@ const T& TemplateWithIndependentFields<T>::constField() const
 }
 
 template <typename T>
-void TemplateWithIndependentFields<T>::useDependentPointer(const T* t)
+typename TemplateWithIndependentFields<T>::Nested TemplateWithIndependentFields<T>::useDependentPointer(const T* t)
 {
+    return Nested();
 }
 
 class DLL_API HasVirtualInCore

tests/NamespacesDerived/NamespacesDerived.Tests.cs

@@ -14,7 +14,7 @@ public class NamespaceDerivedTests
     {
         using (new DerivedFromSecondaryBaseInDependency()) { }
         using (var der2 = new Derived2())
-        using (der2.ExplicitExternalSpecialization) { }
+        using (der2.LocalTypedefSpecialization) { }
     }
 
     [Test]

tests/NamespacesDerived/NamespacesDerived.cpp

@@ -70,9 +70,9 @@ TemplateClass<int> Derived2::getTemplate()
     return t;
 }
 
-TemplateWithIndependentFields<int> Derived2::getExplicitExternalSpecialization()
+Derived2::LocalTypedefSpecialization Derived2::getLocalTypedefSpecialization()
 {
-    return TemplateWithIndependentFields<int>();
+    return LocalTypedefSpecialization();
 }
 
 Abstract* Derived2::getAbstract()
@@ -116,6 +116,20 @@ bool operator<<(const Base& b, const char* str)
     return false;
 }
 
+const char* TestComments::GetIOHandlerControlSequence(char ch)
+{
+    return 0;
+}
+
+int TestComments::SBAttachInfo(const char* path, bool wait_for)
+{
+    return 0;
+}
+
+void TestComments::glfwDestroyWindow(int *window)
+{
+}
+
 void forceUseSpecializations(ForwardedInIndependentHeader value)
 {
 }

tests/NamespacesDerived/NamespacesDerived.h

@@ -45,11 +45,6 @@ class Base3
 
 template <typename T> class TemplateClass;
 
-template<>
-class DLL_API TemplateWithIndependentFields<int>
-{
-};
-
 class DLL_API Derived2 : public Base3
 {
 public:
@@ -65,7 +60,8 @@ public:
     void defaultEnumValueFromDependency(OverlappingNamespace::ColorsEnum c = OverlappingNamespace::ColorsEnum::black);
 
     TemplateClass<int> getTemplate();
-    TemplateWithIndependentFields<int> getExplicitExternalSpecialization();
+    typedef TemplateWithIndependentFields<int> LocalTypedefSpecialization;
+    LocalTypedefSpecialization getLocalTypedefSpecialization();
     Abstract* getAbstract();
 private:
     TemplateClass<int> t;
@@ -112,7 +108,7 @@ namespace NamespacesBase
 /** Note that to prevent extra memory use due to vtable pointer, %HashBase intentionally does not declare a virtual destructor
 and therefore %HashBase pointers should never be used.
 */
-class TestComments
+class DLL_API TestComments
 {
 public:
     //----------------------------------------------------------------------