Imagine you're assigned as a developer to this project and you have to make the first step in refactoring of this Parser class. There are many issues in this class, even though it compiles and works.

Please, submit a pull request with the changes you would recommend to do here. Try to spend 15 minutes maximum for the entire work. If you need more time, you're doing something wrong. Remember, you have to do just the first step in refactoring. Don't fix everything.

Thanks!