Add IsAbstract property

gistfile1.txt

diff --git a/Clang/Ast/CXXRecordDecl.cs b/Clang/Ast/CXXRecordDecl.cs
index 6acc7b3..16f5453 100644
--- a/Clang/Ast/CXXRecordDecl.cs
+++ b/Clang/Ast/CXXRecordDecl.cs
@@ -19,6 +19,13 @@ namespace Clang.Ast
 		public extern bool IsDerivedFrom (CXXRecordDecl baseDecl);
 
 		[MethodImpl (MethodImplOptions.InternalCall)]
+		extern int GetAbstract ();
+
+		public bool IsAbstract {
+			get { return GetAbstract () != 0; }
+		}
+
+		[MethodImpl (MethodImplOptions.InternalCall)]
 		extern void GetBases (IntPtr baseCallback);
 
 		public IEnumerable<RecordType> Bases {
diff --git a/Clang/libclang-mono/ast.cpp b/Clang/libclang-mono/ast.cpp
index 274af1b..aad2154 100644
--- a/Clang/libclang-mono/ast.cpp
+++ b/Clang/libclang-mono/ast.cpp
@@ -468,7 +468,6 @@ LCM_AST_ICALL(Decl, GetAccess)(const MonoObject *decl)
 {
 	return $<Decl> (decl)->getAccess ();
 }
-
 void
 LCM_AST_ICALL(Decl, Dump)(const MonoObject *decl)
 {
@@ -909,6 +908,12 @@ LCM_AST_ICALL(TypedefNameDecl, GetUnderlyingType)(const MonoObject *decl)
 	return $<TypedefNameDecl> (decl)->getUnderlyingType ();
 }
 
+int
+LCM_AST_ICALL(CXXRecordDecl, GetAbstract)(const MonoObject *decl)
+{
+	return $<CXXRecordDecl> (decl)->isAbstract () ? 1 : 0;
+}
+
 void
 LCM_AST_ICALL(CXXRecordDecl, GetBases)(const MonoObject *decl,
 	void (*baseCallback)(const RecordType *))