Extended type maps with the ability to insert custom code instead of a copy ctor invocation.

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

src/AST/Class.cs

@@ -33,10 +33,26 @@ namespace CppSharp.AST
             get
             {
                 Class @class;
-                if (!Type.IsTagDecl(out @class))
-                    throw new NotSupportedException();
-
+                if (Type.IsTagDecl(out @class))
                     return @class;
+
+                var type = Type.Desugar() as TemplateSpecializationType;
+                if (type == null)
+                {
+                    TypedefType typedef;
+                    if (Type.IsPointerTo(out typedef))
+                    {
+                        type = (TemplateSpecializationType) typedef.Desugar();
+                    }
+                    else
+                    {
+                        Type.IsPointerTo(out type);
+                    }
+                }
+                var templatedClass = ((ClassTemplate) type.Template).TemplatedClass;
+                return templatedClass.IsIncomplete
+                    ? (Class) templatedClass.CompleteDeclaration
+                    : templatedClass;
             }
         }
 

src/Generator/Generators/CSharp/CSharpMarshal.cs

@@ -252,10 +252,6 @@ namespace CppSharp.Generators.CSharp
                 if (VarSuffix > 0)
                     instanceName += VarSuffix;
 
-                // Allocate memory for a new native object and call the ctor.
-                Context.SupportBefore.WriteLine("var {0} = Marshal.AllocHGlobal({1});",
-                    instanceName, @class.Layout.Size);
-
                 if (@class.HasNonTrivialCopyConstructor)
                 {
                     // Find a valid copy constructor overload.
@@ -266,13 +262,27 @@ namespace CppSharp.Generators.CSharp
                         throw new NotSupportedException("Expected a valid copy constructor");
 
                     // Call the copy constructor.
+                    TypeMap typeMap;
+                    if (copyCtorMethod.Ignore && FindTypeMap(ctx.Driver.TypeDatabase, @class, out typeMap))
+                    {
+                        typeMap.CSharpMarshalCopyCtorToManaged(Context);
+                    }
+                    else
+                    {
+                        // Allocate memory for a new native object and call the ctor.
+                        Context.SupportBefore.WriteLine("var {0} = Marshal.AllocHGlobal({1});",
+                            instanceName, @class.Layout.Size);
                         Context.SupportBefore.WriteLine("{0}.Internal.{1}({2}, new global::System.IntPtr(&{3}));",
                             QualifiedIdentifier(@class),
                             CSharpTextTemplate.GetFunctionNativeIdentifier(copyCtorMethod),
                             instanceName, instance);
                     }
+                }
                 else
                 {
+                    // Allocate memory for a new native object and call the ctor.
+                    Context.SupportBefore.WriteLine("var {0} = Marshal.AllocHGlobal({1});",
+                        instanceName, @class.Layout.Size);
                     instance = instance.Trim('*');
                     Context.SupportBefore.WriteLine(
                         "CppSharp.Runtime.Helpers.memcpy({0}, new IntPtr(&{1}), new UIntPtr({2}));",
@@ -291,6 +301,13 @@ namespace CppSharp.Generators.CSharp
             return true;
         }
 
+        private static bool FindTypeMap(ITypeMapDatabase typeMapDatabase,
+            Class @class, out TypeMap typeMap)
+        {
+            return typeMapDatabase.FindTypeMap(@class, out typeMap) ||
+                   (@class.HasBase && FindTypeMap(typeMapDatabase, @class.Bases[0].Class, out typeMap));
+        }
+
         public override bool VisitEnumDecl(Enumeration @enum)
         {
             Context.Return.Write("{0}", Context.ReturnVarName);

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -7,6 +7,7 @@ using System.Text;
 using System.Text.RegularExpressions;
 using System.Web.Util;
 using CppSharp.AST;
+using CppSharp.Types;
 using CppSharp.Utils;
 using Attribute = CppSharp.AST.Attribute;
 using Type = CppSharp.AST.Type;
@@ -777,13 +778,11 @@ namespace CppSharp.Generators.CSharp
         {
             foreach (var @base in @class.Bases)
             {
-                if (!@base.IsClass) continue;
-                var baseClass = @base.Class;
-
-                if (baseClass.Ignore)
+                TypeMap typeMap;
+                if (!Driver.TypeDatabase.FindTypeMap(@base.Type, out typeMap) && @base.Class.Ignore)
                     continue;
 
-                GenerateClassFields(baseClass, action);
+                GenerateClassFields(@base.Class, action);
             }
 
             foreach (var field in @class.Fields)

src/Generator/Types/TypeMap.cs

@@ -59,6 +59,11 @@ namespace CppSharp.Types
             throw new NotImplementedException();
         }
 
+        public virtual void CSharpMarshalCopyCtorToManaged(MarshalContext ctx)
+        {
+            
+        }
+
         #endregion
 
         #region C++/CLI backend