Cookbook

Complete, self-contained examples that put the reference pages to work. Each recipe builds one working language end to end — lexer, parser, and evaluation — and calls out the Alpaca features it leans on.

• Expression Evaluator — a math evaluator with arithmetic, exponentiation, unary minus, parentheses, constants, and functions. Focus: operator precedence and the before/after conflict-resolution DSL.
• JSON Parser — objects, arrays, strings, numbers, booleans, and null. Focus: recursive rules, separator-delimited lists, backtick-quoted token names.
• Contextual Lexing — stateful tokenization: nesting depth, counters, lexer-to-parser hand-off, graceful errors. Focus: custom LexerCtx/ParserCtx, tracking fragments, ErrorHandling.
• BrainFuck Interpreter — the full BrainFuck> interpreter built incrementally through the rest of the docs, assembled in one place. Combines every feature above.

New to Alpaca? Start with Getting Started, which walks through the BrainFuck interpreter step by step.