decaffeinate-parser

decaffeinate-parser

This project uses the official CoffeeScript parser to parse CoffeeScript source code, then maps the AST generated by the parser to one more suitable for the decaffeinate project based on the AST generated by CoffeeScriptRedux.

This project might be useful to anyone who wants to work with a CoffeeScript AST and prefers the AST generated by CoffeeScriptRedux, but wants to avoid the source compatibility issues introduced by using that project. Note that it is not 100% compatible with CoffeeScriptRedux:

• Single-line functions, if statements, etc. have blocks for bodies.
• Ranges of programs with indented blocks are correct.
• super is supported in classes.
• extends is usable as a binary operator and in class declarations.
• // (floor division) is supported.

Install

$ npm install --save-dev decaffeinate-parser

Usage

This example gets the names of the parameters in the add function:

import { parse } from 'decaffeinate-parser';
const program = parse('add = (a, b) -> a + b');
const assignment = program.body.statements[0];
const fn = assignment.expression;
console.log(fn.parameters.map(param => param.data)); // [ 'a', 'b' ]