System.Linq.Expressions.BinaryExpression.ReduceVariable C# (CSharp) Метод

        private Expression ReduceVariable()
        {
            // v (op)= r
            // ... is reduced into ...
            // v = v (op) r
            ExpressionType op = GetBinaryOpFromAssignmentOp(NodeType);
            Expression r = Expression.MakeBinary(op, Left, Right, false, Method);
            LambdaExpression conversion = GetConversion();
            if (conversion != null)
            {
                r = Expression.Invoke(conversion, r);
            }
            return Expression.Assign(Left, r);
        }