Parsly

A small PEG based parser library.
An opinionated JavaScript port of Parslet.

Install

npm install --save parsly

Usage

// There is 2 ways to access Parsly APIs.
 
// Parser API:
import {Parser} from 'parsly'
import {alt, seq, match, str, any, custom, lazy} from 'parsly/parser'
 
// Transform API:
import {Transformer} from 'parsly'
import Transformer, {simple, sequence, subtree} from 'parsly/transformer'

Parser API

Atoms

• alt(...parsers)
• seq(...parsers)
• match(expr)
• str(string)
• any()
• custom(fn)
• lazy(fn)

Chain

• as(name)
• maybe()
• many()
• times(n)
• repeat(min, max)

Transform API

• Transform
• Node
• simple(node)
• sequence(node)
• subtree(node)

Transform class

• Transform(rules)
• Transform#rule(matchFn, transformFn)
• Transform#run(ast, context)