src/utils/ast/ASTParser.js

import ASTState from './ASTState';

/**
 * `ASTParser` is a fork of `Astring`. The original author is David Bonnet and `Astring` is released under an MIT
 * license. This version is only available by the MPLv2.0 license. Please see the original source.
 * @see  https://github.com/davidbonnet/astring.git
 *
 * Eventually once ASTParser is feature complete for Babylon & ESTree AST and further modularized it will be released
 * as a separate NPM module supporting plugins.
 *
 * Please note that not all of the Babylon AST nodes are currently supported. `astParser` is currently only used by
 * `typhonjs-escomplex` for realizing computed method names and associated Halstead operands and operators.
 *
 */
export default class ASTParser
{
   /**
    * ASTParser returns an instance of ParserData containing a string representing the rendered code of the provided AST
    * `node`. In addition Halstead operators and operands are available via ParserData.
    *
    * @param {object}      node - An ESTree or Babylon AST node.
    *
    * @param {object}      options - Optional parameters for source code formatting.
    * @property {string}   indent - A string to use for indentation (defaults to `\t`)
    * @property {string}   lineEnd - A string to use for line endings (defaults to `\n`)
    * @property {number}   startingIndentLevel - indent level to start from (default to `0`)
    *
    * @returns {ASTData}
    */
   static parse(node, options)
   {
      const state = new ASTState(options);

      // Travel through the AST node and generate the code.
      state.generator[node.type](node, state);

      return state.output;
   }
}