Handling Constant TLA⁺ Expressions

This tutorial page covers the next three chapters in Crafting Interpreters:

1. Chapter 5: Representing Code
2. Chapter 6: Parsing Expressions
3. Chapter 7: Evaluating Expressions

Same as the book, we could build a parser for our entire minimal TLA⁺ language subset before moving on to interpreting it, but that would be boring! Instead we focus on a simple vertical slice of the language: expressions. And not just any expressions, constant expressions - expressions that do not contain variables or identifiers that we would have to resolve. Just primitive literal values stuck together, not too much more advanced than a simple calculator app. This will give us a skeleton on which to hang the rest of the language.