babel-core/lib/babel/transformation/helpers/build-comprehension.js

Turn ES6 code into readable vanilla ES5 with source maps

"use strict";

var _interopRequireWildcard = function (obj) { return obj && obj.__esModule ? obj : { "default": obj }; };

module.exports = build;

var t = _interopRequireWildcard(require("../../types"));

function build(node, buildBody) {
  var self = node.blocks.shift();
  if (!self) return;

  var child = build(node, buildBody);
  if (!child) {
    // last item
    child = buildBody();

    // add a filter as this is our final stop
    if (node.filter) {
      child = t.ifStatement(node.filter, t.blockStatement([child]));
    }
  }

  return t.forOfStatement(t.variableDeclaration("let", [t.variableDeclarator(self.left)]), self.right, t.blockStatement([child]));
}