Turtle Compiler

Ok, so I need to finish the Dragon book before I get too far into this.

Micro Pass Compiler

I need several syntaxes that are related. A compiler node operates on one syntax and outputs one syntax (often the same).

This makes it easy to test compiler nodes - run the compiler without the node and run the tests against the output, then re-run the compiler with the node and make sure all the tests still pass. Also it makes it easy to benchmark, same operation.