Lamb

A (very WIP) lambda expression evaluator and debugger.

I'd like to build the following:

parsing with parsec
- need to harden tests a bit more but existing tests pass
alpha/beta reduction to beta normal
substitutions for known abstractions (numbers can be written and are displayed as numbers rather than lambda terms)
persisted variables
display all steps in alpha/beta reductions until beta normal form is reached
online web-based lambda playground