babel-core/lib/babel/transformation/helpers/build-conditional-assignment-operator-transformer.js

Turn ES6 code into readable vanilla ES5 with source maps

"use strict";

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

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

var explode = _interopRequire(require("./explode-assignable-expression"));

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

module.exports = function (exports, opts) {
  var buildAssignment = function buildAssignment(left, right) {
    return t.assignmentExpression("=", left, right);
  };

  exports.ExpressionStatement = function (node, parent, scope, file) {
    // hit the `AssignmentExpression` one below
    if (file.isConsequenceExpressionStatement(node)) return;

    var expr = node.expression;
    if (!opts.is(expr, file)) return;

    var nodes = [];

    var exploded = explode(expr.left, nodes, file, scope);

    nodes.push(t.ifStatement(opts.build(exploded.uid, file), t.expressionStatement(buildAssignment(exploded.ref, expr.right))));

    return nodes;
  };

  exports.AssignmentExpression = function (node, parent, scope, file) {
    if (!opts.is(node, file)) return;

    var nodes = [];
    var exploded = explode(node.left, nodes, file, scope);

    nodes.push(t.logicalExpression("&&", opts.build(exploded.uid, file), buildAssignment(exploded.ref, node.right)));

    // todo: duplicate expression node
    nodes.push(exploded.ref);

    return nodes;
  };
};