If you would like a heartwarming tale of an engineers first compiler, this is the article for you.

There is either nothing to learn here, or a spectacular insight into compilation, depending on where you are in your career.

Compilers are fun. It’s an invaluable experience having written one. There is no magic left in a computer once you’ve written a compiler.

If you have written a compiler, this article is amusing. You get to see a programmers eyes open.

If you have not written a compiler, you get some insight about how they work- but perhaps you get more insight about how you work.

Also, the author should constant fold his arithmetic example. It slows down compile time, but makes the program faster.