Let's Write a JSON Parser From Scratch

A comprehensive guide to building a JSON parser from scratch, covering tokenization (breaking JSON strings into meaningful tokens like braces, strings, and numbers) and parsing (converting tokens into an Abstract Syntax Tree). The tutorial walks through implementing a tokenizer that handles JSON syntax including strings, numbers, booleans, and nested structures, followed by a parser that creates AST nodes. Includes complete Go code examples with detailed explanations of handling edge cases like escaped quotes, number validation, and proper error handling.