Fixed the v-table interop to be compilable.

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

src/Generator/AST/VTables.cs

@@ -25,21 +25,15 @@ namespace CppSharp.AST
         public static List<VTableComponent> GatherVTableMethodEntries(VTableLayout layout)
         {
             var entries = new List<VTableComponent>();
-
-            foreach (var component in layout.Components)
-            {
-                if (component.Kind == VTableComponentKind.CompleteDtorPointer)
-                    continue;
-
-                if (component.Kind == VTableComponentKind.RTTI)
-                    continue;
-
-                if (component.Kind == VTableComponentKind.UnusedFunctionPointer)
-                    continue;
-
-                if (component.Method != null)
-                    entries.Add(component);
-            }
+            if (layout == null)
+                return entries;
+
+            entries.AddRange(from component in layout.Components
+                             where component.Kind != VTableComponentKind.CompleteDtorPointer &&
+                                   component.Kind != VTableComponentKind.RTTI &&
+                                   component.Kind != VTableComponentKind.UnusedFunctionPointer &&
+                                   component.Method != null
+                             select component);
 
             return entries;
         }

src/Generator/Generators/CSharp/CSharpTextTemplate.cs

@@ -534,8 +534,7 @@ namespace CppSharp.Generators.CSharp
                     ReturnType = field.QualifiedType
                 };
 
-                var marshal = new CSharpMarshalNativeToManagedPrinter(ctx);
-                marshal.VarSuffix = i;
+                var marshal = new CSharpMarshalNativeToManagedPrinter(ctx) { VarSuffix = i };
                 field.Visit(marshal);
 
                 if (!string.IsNullOrWhiteSpace(marshal.Context.SupportBefore))
@@ -1075,8 +1074,9 @@ namespace CppSharp.Generators.CSharp
             }
 
             var marshals = new List<string>();
-            foreach (var param in method.Parameters)
+            for (int i = 0; i < method.Parameters.Count; i++)
             {
+                var param = method.Parameters[i];
                 if (param.Ignore)
                     continue;
 
@@ -1089,7 +1089,7 @@ namespace CppSharp.Generators.CSharp
                     ReturnVarName = SafeIdentifier(param.Name)
                 };
 
-                var marshal = new CSharpMarshalNativeToManagedPrinter(ctx);
+                var marshal = new CSharpMarshalNativeToManagedPrinter(ctx) { VarSuffix = i };
                 param.Visit(marshal);
 
                 if (!string.IsNullOrWhiteSpace(marshal.Context.SupportBefore))
@@ -1104,7 +1104,7 @@ namespace CppSharp.Generators.CSharp
             if (hasReturn)
                 Write("var _ret = ");
 
-            WriteLine("target.{0}({1});", method.Name, string.Join(", ", marshals));
+            WriteLine("target.{0}({1});", SafeIdentifier(method.Name), string.Join(", ", marshals));
 
             // TODO: Handle hidden structure return types.
 
@@ -1170,7 +1170,8 @@ namespace CppSharp.Generators.CSharp
 
         public string GetVTableMethodDelegateName(Method method)
         {
-            return string.Format("_{0}Delegate", GetFunctionIdentifier(method));
+            // trim '@' (if any) because '@' is valid only as the first symbol
+            return string.Format("_{0}Delegate", GetFunctionIdentifier(method).Trim('@'));
         }
 
         public void GenerateVTablePointers(Class @class)

src/Generator/Passes/CleanInvalidDeclNamesPass.cs

@@ -47,6 +47,24 @@ namespace CppSharp.Passes
             return base.VisitDeclaration(decl);
         }
 
+        public override bool VisitClassDecl(Class @class)
+        {
+            if (@class.IsDynamic)
+            {
+                // HACK: entries in v-tables are not shared (as objects) with the virtual methods they represent;
+                // this is why this pass fixes only the arg names used with real methods, 
+                // while the v-table entries could remain with empty names;
+                // this should be fixed in the parser: it should reuse method objects
+                foreach (var parameter in VTables.GatherVTableMethodEntries(@class).Where(
+                    entry => entry.Method != null).SelectMany(entry => entry.Method.Parameters))
+                {
+                    parameter.Name = CheckName(parameter.Name);
+                }   
+            }
+
+            return base.VisitClassDecl(@class);
+        }
+
         public override bool VisitFunctionDecl(Function function)
         {
             uniqueName = 0;