IronRuby.Builtins.RubyClass.GetAllocatorNewExpression C# (CSharp) Method

        private Expression GetAllocatorNewExpression(CallArguments/*!*/ args, Func<Expression>/*!*/ defaultExceptionMessage) {
            Type type = GetUnderlyingSystemType();

            if (type == typeof(object)) {
                type = typeof(RubyObject);
            }

            if (_structInfo != null) {
                return Methods.AllocateStructInstance.OpCall(AstUtils.Convert(args.TargetExpression, typeof(RubyClass)));
            }

            ConstructorInfo ctor;
            if (IsException()) {
                if ((ctor = GetConstructor(type, typeof(string))) != null) {
                    return Ast.New(ctor, defaultExceptionMessage());
                } else if ((ctor = GetConstructor(type, typeof(string), typeof(Exception))) != null) {
                    return Ast.New(ctor, defaultExceptionMessage(), AstUtils.Constant(null));
                }
            }

            if ((ctor = GetConstructor(type, typeof(RubyClass))) != null) {
                return Ast.New(ctor, AstUtils.Convert(args.TargetExpression, typeof(RubyClass)));
            }

            if ((ctor = GetConstructor(type, typeof(RubyContext))) != null) {
                return Ast.New(ctor, AstUtils.Convert(args.MetaContext.Expression, typeof(RubyContext)));
            }

            if ((ctor = GetConstructor(type)) != null) {
                return Ast.New(ctor);
            }

            if (type.IsValueType && type != typeof(int) && type != typeof(double)) {
                return Ast.New(type);
            }

            return null;
        }