Handled internals of nested template specialisations.

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

src/Generator/Driver.cs

@@ -282,6 +282,7 @@ namespace CppSharp
                 if (Options.GenerateInlines)
                     TranslationUnitPasses.AddPass(new GenerateInlinesCodePass());
                 TranslationUnitPasses.AddPass(new TrimSpecializationsPass());
+                TranslationUnitPasses.AddPass(new MoveNestedTemplateInternalsPass());
                 TranslationUnitPasses.AddPass(new GenerateTemplatesCodePass());
             }
 

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -348,7 +348,10 @@ namespace CppSharp.Generators.CSharp
                 return;
 
             PushBlock(CSharpBlockKind.Namespace);
-            WriteLine("namespace {0}", classTemplate.Name);
+            WriteLine("namespace {0}{1}",
+                classTemplate.OriginalNamespace is Class ?
+                    classTemplate.OriginalNamespace.Name + '_' : string.Empty,
+                classTemplate.Name);
             WriteStartBraceIndent();
 
             foreach (var specialization in specializations)

src/Generator/Generators/CSharp/CSharpTypePrinter.cs

@@ -388,7 +388,7 @@ namespace CppSharp.Generators.CSharp
                     return GetNestedQualifiedName(decl);
                 var specialization = template.GetClassTemplateSpecialization();
                 return string.Format("{0}.Internal{1}",
-                    GetNestedQualifiedName(specialization.TemplatedDecl.Namespace, specialization),
+                    GetNestedQualifiedName(specialization),
                     Helpers.GetSuffixForInternal(specialization, this));
             }
 
@@ -611,21 +611,30 @@ namespace CppSharp.Generators.CSharp
             return GetNestedQualifiedName(@enum);
         }
 
-        public string GetNestedQualifiedName(ClassTemplateSpecialization decl)
+        public string GetNestedQualifiedName(Declaration decl)
         {
-            return GetNestedQualifiedName(decl.Namespace, decl);
-        }
-
-        private string GetNestedQualifiedName(Declaration decl)
-        {
-            return GetNestedQualifiedName(decl.Namespace, decl);
-        }
+            var names = new List<string>();
 
-        private string GetNestedQualifiedName(Declaration @namespace, Declaration decl)
-        {
-            var names = new List<string> { decl.Name };
-
-            var ctx = @namespace;
+            Declaration ctx;
+            var specialization = decl as ClassTemplateSpecialization;
+            if (specialization != null)
+            {
+                ctx = specialization.TemplatedDecl.Namespace;
+                if (specialization.OriginalNamespace is Class)
+                {
+                    names.Add(string.Format("{0}_{1}", decl.OriginalNamespace.Name, decl.Name));
+                    ctx = ctx.Namespace;
+                }
+                else
+                {
+                    names.Add(decl.Name);
+                }
+            }
+            else
+            {
+                names.Add(decl.Name);
+                ctx = decl.Namespace;
+            }
             while (ctx != null)
             {
                 if (!string.IsNullOrWhiteSpace(ctx.Name))

src/Generator/Passes/MoveNestedTemplateInternalsPass.cs

@@ -0,0 +1,66 @@
+using System.Collections.Generic;
+using System.Linq;
+using CppSharp.AST;
+
+namespace CppSharp.Passes
+{
+    public class MoveNestedTemplateInternalsPass : TranslationUnitPass
+    {
+        public MoveNestedTemplateInternalsPass()
+        {
+            Options.VisitClassBases = false;
+            Options.VisitClassFields = false;
+            Options.VisitClassMethods = false;
+            Options.VisitClassProperties = false;
+            Options.VisitFunctionParameters = false;
+            Options.VisitFunctionReturnType = false;
+            Options.VisitNamespaceEnums = false;
+            Options.VisitNamespaceEvents = false;
+            Options.VisitNamespaceTypedefs = false;
+            Options.VisitNamespaceVariables = false;
+            Options.VisitTemplateArguments = false;
+        }
+
+        public override bool VisitLibrary(ASTContext context)
+        {
+            var result = base.VisitLibrary(context);
+            foreach (var entry in movedClassTemplates)
+            {
+                foreach (var template in entry.Value)
+                {
+                    foreach (var decl in new[] { template, template.TemplatedDecl })
+                    {
+                        int index = entry.Key.Declarations.IndexOf(decl.Namespace);
+                        decl.Namespace.Declarations.Remove(decl);
+                        decl.Namespace = entry.Key;
+                        entry.Key.Declarations.Insert(index, decl);
+                    }
+                }
+            }
+            return result;
+        }
+
+        public override bool VisitClassTemplateDecl(ClassTemplate template)
+        {
+            if (!base.VisitClassTemplateDecl(template) ||
+                template.Specializations.Count == 0 ||
+                template.Specializations.All(s => s is ClassTemplatePartialSpecialization))
+                return false;
+
+            var @class = template.TemplatedDecl.Namespace as Class;
+            if (@class == null || @class is ClassTemplateSpecialization ||
+                @class.Namespace is Class)
+                return false;
+
+            if (movedClassTemplates.ContainsKey(@class.Namespace))
+                movedClassTemplates[@class.Namespace].Add(template);
+            else
+                movedClassTemplates.Add(@class.Namespace, new List<ClassTemplate> { template });
+
+            return true;
+        }
+
+        private Dictionary<DeclarationContext, IList<ClassTemplate>> movedClassTemplates =
+            new Dictionary<DeclarationContext, IList<ClassTemplate>>();
+    }
+}

tests/CSharp/CSharpTemplates.h

@@ -50,6 +50,10 @@ class DLL_API TemplateSpecializer
 {
 public:
     TemplateSpecializer();
+    template <typename T>
+    class NestedTemplate
+    {
+    };
 private:
     IndependentFields<int> independentFields;
     DependentValueFields<bool> dependentValueFields;
@@ -59,6 +63,7 @@ private:
     DependentValueFields<T2> dependentPointerFieldsT2;
     DependentValueFields<IndependentFields<int>> specializeWithSpecialization;
     DependentValueFields<IndependentFields<bool>> specializeWithSameSpecialization;
+    NestedTemplate<int> nestedTemplate;
     void completeSpecializationInParameter(DependentValueFields<float> p1,
                                            DependentValueFields<int*> p2,
                                            DependentValueFields<float*> p3);