@choo-choo/parser-peg

PEG (peggy / PEG.js dialect) grammar parser for Choo Choo railroad diagrams.

Parses a PEG grammar source string and returns an ordered list of rules, each with an IR tree ready to render.

Install

npm install @choo-choo/core @choo-choo/parser-peg

Example

import { render } from "@choo-choo/core";
import { pegParser } from "@choo-choo/parser-peg";

const source = `
digit = "0" / "1"
pair  = digit digit
`;

const parsed = pegParser.parse(source);
const pair = parsed.rules.find((r) => r.name === "pair")!;
const svg = render(pair.diagram);

Learn more

• Documentation
• GitHub

License

MIT