@babel/helper-explode-class/lib/index.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = _default;

var _helperBindifyDecorators = _interopRequireDefault(require("@babel/helper-bindify-decorators"));

var t = _interopRequireWildcard(require("@babel/types"));

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _default(classPath) {
  classPath.assertClass();
  const memoisedExpressions = [];

  function maybeMemoise(path) {
    if (!path.node || path.isPure()) return;
    const uid = classPath.scope.generateDeclaredUidIdentifier();
    memoisedExpressions.push(t.assignmentExpression("=", uid, path.node));
    path.replaceWith(uid);
  }

  function memoiseDecorators(paths) {
    if (!Array.isArray(paths) || !paths.length) return;
    paths = paths.reverse();
    (0, _helperBindifyDecorators.default)(paths);

    for (const path of paths) {
      maybeMemoise(path);
    }
  }

  maybeMemoise(classPath.get("superClass"));
  memoiseDecorators(classPath.get("decorators"), true);
  const methods = classPath.get("body.body");

  for (const methodPath of methods) {
    if (methodPath.is("computed")) {
      maybeMemoise(methodPath.get("key"));
    }

    if (methodPath.has("decorators")) {
      memoiseDecorators(classPath.get("decorators"));
    }
  }

  if (memoisedExpressions) {
    classPath.insertBefore(memoisedExpressions.map(expr => t.expressionStatement(expr)));
  }
}