Comment by fjfaase

It surprises that they are still teaching parsing techniques that are based on limitation from 40 years ago, when memory was limited and you had to parse a file one character at the time. Why not start with a back-tracking recursive descent parser on a file stored in memory? Can be made efficient with some simple caching. In an introduction course there is no need to aim for maximum performance if parsing a 10k lines program takes less than a second.