Process base class references as forward references.

src/Generator/Generators/CLI/CLIForwardRefeferencePrinter.cs

@@ -8,11 +8,33 @@ namespace Cxxi.Generators.CLI
     {
         public readonly IList<string> Includes;
         public readonly IList<string> Refs;
+        private readonly TypeRefsVisitor TypeRefs;
 
-        public CLIForwardRefeferencePrinter()
+        public CLIForwardRefeferencePrinter(TypeRefsVisitor typeRefs)
         {
             Includes = new List<string>();
             Refs = new List<string>();
+            TypeRefs = typeRefs;
+        }
+
+        public void Process()
+        {
+            foreach (var forwardRef in TypeRefs.ForwardReferences)
+                forwardRef.Visit(this);
+
+            foreach (var baseClass in TypeRefs.Bases)
+                VisitBaseClass(baseClass);
+        }
+
+        public void VisitBaseClass(Class @class)
+        {
+            if (@class.IsIncomplete)
+                @class = @class.CompleteDeclaration as Class;
+
+            if (@class == null)
+                return;
+
+            Includes.Add(GetHeaderFromDecl(@class));
         }
 
         public bool VisitDeclaration(Declaration decl)

src/Generator/Generators/CLI/CLIHeadersTemplate.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.IO;
 
 namespace Cxxi.Generators.CLI
@@ -36,10 +37,10 @@ namespace Cxxi.Generators.CLI
 
         public void GenerateIncludeForwardRefs()
         {
-            forwardRefsPrinter = new CLIForwardRefeferencePrinter();
+            var typeRefs = unit.TypeReferences as TypeRefsVisitor;
 
-            foreach (var forwardRef in unit.ForwardReferences)
+            forwardRefsPrinter = new CLIForwardRefeferencePrinter(typeRefs);
-                forwardRef.Visit(forwardRefsPrinter);
+            forwardRefsPrinter.Process();
 
             var includes = new HashSet<string>();
 

src/Generator/Types/Types.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Diagnostics;
 using Cxxi.Generators;
 using Cxxi.Types;
 
@@ -136,9 +137,10 @@ namespace Cxxi
     /// that a file needs to be reference something that has not been declared
     /// yet. In that case, we need to declare it before referencing it.
     /// </summary>
-    class TypeRefsVisitor : AstVisitor
+    public class TypeRefsVisitor : AstVisitor
     {
         public ISet<Declaration> ForwardReferences;
+        public ISet<Class> Bases;
 
         public void Collect(Declaration declaration)
         {
@@ -154,6 +156,7 @@ namespace Cxxi
         public TypeRefsVisitor()
         {
             ForwardReferences = new HashSet<Declaration>();
+            Bases = new HashSet<Class>();
         }
 
         public override bool VisitClassDecl(Class @class)
@@ -175,6 +178,14 @@ namespace Cxxi
             foreach (var method in @class.Methods)
                 VisitMethodDecl(method);
 
+            foreach (var @base in @class.Bases)
+            {
+                if (!@base.IsClass)
+                    continue;
+
+                Bases.Add(@base.Class);
+            }
+
             return true;
         }