Handled any level of nesting when generating internals for specialisations in C#.

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

src/CppParser/Bindings/CSharp/i686-apple-darwin12.4.0/Std.cs

@@ -725,26 +725,26 @@ namespace Std
             public unsafe partial struct __Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C
             {
                 [FieldOffset(0)]
-                internal global::Std.BasicString.Rep._.__Internal _;
+                internal global::Std.BasicString.Rep._.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C _;
             }
 
-
-            public unsafe partial struct _
+            namespace _
             {
                 [StructLayout(LayoutKind.Explicit, Size = 12)]
-                public partial struct __Internal
+                public unsafe partial struct __Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C
                 {
                     [FieldOffset(0)]
-                    internal global::Std.BasicString.Long.__Internal __l;
+                    internal global::Std.BasicString.Long.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C __l;
 
                     [FieldOffset(0)]
-                    internal global::Std.BasicString.Short.__Internal __s;
+                    internal global::Std.BasicString.Short.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C __s;
 
                     [FieldOffset(0)]
-                    internal global::Std.BasicString.Raw.__Internal __r;
+                    internal global::Std.BasicString.Raw.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C __r;
                 }
 
             }
+
         }
 
         namespace Long
@@ -770,17 +770,16 @@ namespace Std
             public unsafe partial struct __Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C
             {
                 [FieldOffset(0)]
-                internal global::Std.BasicString.Short._.__Internal _;
+                internal global::Std.BasicString.Short._.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C _;
 
                 [FieldOffset(1)]
                 internal fixed sbyte __data_[11];
             }
 
-
-            public unsafe partial struct _
+            namespace _
             {
                 [StructLayout(LayoutKind.Explicit, Size = 1)]
-                public partial struct __Internal
+                public unsafe partial struct __Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C
                 {
                     [FieldOffset(0)]
                     internal byte __size_;
@@ -790,6 +789,7 @@ namespace Std
                 }
 
             }
+
         }
 
         namespace Raw

src/CppParser/Bindings/CSharp/x86_64-apple-darwin12.4.0/Std.cs

@@ -728,6 +728,23 @@ namespace Std
                 internal global::Std.BasicString.Rep._.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C _;
             }
 
+            namespace _
+            {
+                [StructLayout(LayoutKind.Explicit, Size = 24)]
+                public unsafe partial struct __Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C
+                {
+                    [FieldOffset(0)]
+                    internal global::Std.BasicString.Long.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C __l;
+
+                    [FieldOffset(0)]
+                    internal global::Std.BasicString.Short.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C __s;
+
+                    [FieldOffset(0)]
+                    internal global::Std.BasicString.Raw.__Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C __r;
+                }
+
+            }
+
         }
 
         namespace Long
@@ -759,6 +776,20 @@ namespace Std
                 internal fixed sbyte __data_[23];
             }
 
+            namespace _
+            {
+                [StructLayout(LayoutKind.Explicit, Size = 1)]
+                public unsafe partial struct __Internalc__N_std_N___1_S_basic_string__C___N_std_N___1_S_char_traits__C___N_std_N___1_S_allocator__C
+                {
+                    [FieldOffset(0)]
+                    internal byte __size_;
+
+                    [FieldOffset(0)]
+                    internal sbyte __lx;
+                }
+
+            }
+
         }
 
         namespace Raw

src/Generator/Generators/CSharp/CSharpSources.cs

@@ -271,19 +271,26 @@ namespace CppSharp.Generators.CSharp
                 GenerateClassInternals(specialization);
 
             foreach (var group in generated.SelectMany(s => s.Classes).GroupBy(c => c.Name))
-            {
-                WriteLine($"namespace {group.Key}");
-                WriteStartBraceIndent();
-                foreach (var nestedClass in group)
-                    GenerateClassInternals(nestedClass);
-                WriteCloseBraceIndent();
-                NewLine();
-            }
+                GenerateNestedInternals(group.Key, group);
 
             WriteCloseBraceIndent();
             PopBlock(NewLineKind.BeforeNextBlock);
         }
 
+        private void GenerateNestedInternals(string name, IEnumerable<Class> nestedClasses)
+        {
+            WriteLine($"namespace {name}");
+            WriteStartBraceIndent();
+            foreach (var nestedClass in nestedClasses)
+            {
+                GenerateClassInternals(nestedClass);
+                foreach (var nestedInNested in nestedClass.Classes)
+                    GenerateNestedInternals(nestedInNested.Name, new[] { nestedInNested });
+            }
+            WriteCloseBraceIndent();
+            NewLine();
+        }
+
         private IEnumerable<ClassTemplateSpecialization> GetGenerated(
             IList<ClassTemplateSpecialization> specializations)
         {