ceph/src/civetweb/src/third_party/duktape-1.8.0/polyfills/duktape-error-setter-writable.js

   1 /*
   2  *  Ensure Error .fileName, .lineNumber, and .stack are directly writable
   3  *  without having to use Object.defineProperty().  This matches Duktape
   4  *  1.4.0 behavior.
   5  *
   6  *  See: https://github.com/svaarala/duktape/pull/390.
   7  */
   8
   9 (function () {
  10     var err = new Error('test');
  11     err.fileName = 999;
  12     if (err.fileName === 999) { return; }  // already writable
  13
  14     Object.defineProperties(Error.prototype, {
  15         fileName: { set: new Function('v', 'Object.defineProperty(this, "fileName", { value: v, writable: true, enumerable: false, configurable: true });') },
  16         lineNumber: { set: new Function('v', 'Object.defineProperty(this, "lineNumber", { value: v, writable: true, enumerable: false, configurable: true });') },
  17         stack: { set: new Function('v', 'Object.defineProperty(this, "stack", { value: v, writable: true, enumerable: false, configurable: true });') },
  18     });
  19 })();