jbang

    0.1.1 • Public • Published

    J!

    NOTE: work in progress!

    J! is a parser generator for domain specific languages.

    J! is different from many parser generators in that the syntax is expressive enough to support parsing strings as well as objects, arrays or any other value type. The result of this capability is that each step of the compiler can be expressed as dsl.

    OMeta’s key insight is the realization that all of the passes in a traditional compiler are essentially pattern matching operations

    ~ Experimenting with Programming Languages, Alessandro Warth 2009

    How to use

    npm i jbang
    import { jbang } from "jbang"
    import { Digit } from "jbang/parsers/tokenizer"
     
    // This generates a parser which can be used as a 
    export const calc = jbang`
      Add = x:Number '+' y:Number -> ${({ x, y }) => x + y}
      Number = i:${Digit} -> ${({ i }) => parseInt(i)}
      Main
        = Add
        | Number
    `
     
    // Parses a calculator dsl which procuces mathematical results
    const { value } = calc`1+2`
    assert(value === 3)
     

    Documentation

    This is a work in progress

    Resources

    This project is based on a previous project I made called Meta# which was a C# implementation of the ideas written in the OMeta paper by Alessandro Warth.

    Install

    npm i jbang

    DownloadsWeekly Downloads

    4

    Version

    0.1.1

    License

    MIT

    Unpacked Size

    233 kB

    Total Files

    131

    Last publish

    Collaborators

    • justinmchase