Sign Up for Free

RunKit +

Try any Node.js package right in your browser

This is a playground to test code. It runs a full Node.js environment and already has all of npm’s 400,000 packages pre-installed, including lavriapg with all npm packages installed. Try it out:

var lavriapg = require("lavriapg")

This service is provided by RunKit and is not affiliated with npm, Inc or the package authors.

lavriapg v0.2.0

lalr(1) parser generator written in TypeScript

LavRia

TypeScript LALR(1) Parser Generator

install

requirement: npm

$ mkdir pg
$ cd pg
$ npm init
$ npm install lavriapg --save

sample

$ echo 1+1 | node ./node_modules/lavriapg/dist/sample.js

usage

edit language and run the following code:

// TypeScript
import {language_parser, ParserGenerator} from "lavriapg";
import {readFileSync} from "fs";

const input = readFileSync("/dev/stdin", "utf8") as string;
const language = language_parser.parse(readFileSync("./node_modules/lavriapg/language", "utf8") as string); // set the language file path
const parser = new ParserGenerator(language).getParser();
console.log(parser.parse(input));
// JavaScript(CommonJS)
const pg = require("lavriapg");
const fs = require("fs");
const input = fs.readFileSync("/dev/stdin", "utf8");
const language = pg.language_parser.parse(fs.readFileSync("./node_modules/lavriapg/language", "utf8")); // set the language file path
const parser = new pg.ParserGenerator(language).getParser();
console.log(parser.parse(input));

this program parses input (from stdin) that has the lex and grammar rules defined by language and shows its AST.

language is language file and it expresses itself.

Metadata

RunKit is a free, in-browser JavaScript dev environment for prototyping Node.js code, with every npm package installed. Sign up to share your code.
Sign Up for Free