@babel/helpers/lib/helpers/using.js

Collection of helper functions used by Babel transforms.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = _using;
function _using(stack, value, isAwait) {
  if (value === null || value === void 0) return value;
  if (Object(value) !== value) {
    throw new TypeError("using declarations can only be used with objects, functions, null, or undefined.");
  }
  if (isAwait) {
    var dispose = value[Symbol.asyncDispose || Symbol.for("Symbol.asyncDispose")];
  }
  if (dispose === null || dispose === void 0) {
    dispose = value[Symbol.dispose || Symbol.for("Symbol.dispose")];
  }
  if (typeof dispose !== "function") {
    throw new TypeError(`Property [Symbol.dispose] is not a function.`);
  }
  stack.push({
    v: value,
    d: dispose,
    a: isAwait
  });
  return value;
}

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