Shplait Lambda 3 Syntax And Evaluation

Summary

Representing `fun` forms and motivating the associated generalization of application forms. Distinguishing expressions from values, and treating functions as values. Parsing for Moe with `fun` expressions and the revised `Exp` datatype. Adds let expressions (or let bindings, or let-in expressions) to our The λ-calculus is an even simpler language than Moe. It's a Turing-complete language that was invented by Alonzo Church in the ... Our second step in understanding the letrec encoding is to separate the part of the factorial function's implementation that is not ...