Building Your Own Programming Language

Learn the essential parts of programming language design! Through creating a new programming language, you’ll learn how to break down a program into its necessary elements: first into tokens through lexical analysis, and then into a traversable abstract syntax tree composed of those tokens. You’ll also write an interpreter, and learn how to transpile your language to JavaScript to make it runnable.

• Introduction
• Compilers & Interpreters Overview
• Course Project
• Lexing: Lexical Analysis
• Identity Helpers & Lexer
• Lexing White Space & Parenthesis
• Lexing Numbers & Letters
• Lexing Characters & Strings
• Internal Representations & ASTs
• Steps to Build an AST
• Parsing Exercise
• Parsing Solution
• REPLs
• Adding the Standard Library
• Evaluating Expressions
• Looking Up Identifiers
• Adding to the Standard Library
• Building the REPL CLI
• Running Files from the CLI
• Generation & Babel generate
• Transformation: Visitor Pattern
• Implementing Traverse
• Testing Traverse
• Transform Practice
• Transpiling to JavaScript
• Transforming to Variable Declarations
• Variable Evaluation
• Transpiling Variable Declarations to JavaScript
• Parser Generators
• Wrapping Up