Error.js (867B)
1 /* This Source Code Form is subject to the terms of the Mozilla Public 2 * License, v. 2.0. If a copy of the MPL was not distributed with this 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 4 5 /* ES6 20140718 draft 19.5.3.4. */ 6 function ErrorToString() { 7 /* Steps 1-2. */ 8 var obj = this; 9 if (!IsObject(obj)) { 10 ThrowTypeError(JSMSG_INCOMPATIBLE_PROTO, "Error", "toString", "value"); 11 } 12 13 /* Steps 3-5. */ 14 var name = obj.name; 15 name = name === undefined ? "Error" : ToString(name); 16 17 /* Steps 6-8. */ 18 var msg = obj.message; 19 msg = msg === undefined ? "" : ToString(msg); 20 21 /* Step 9. */ 22 if (name === "") { 23 return msg; 24 } 25 26 /* Step 10. */ 27 if (msg === "") { 28 return name; 29 } 30 31 /* Step 11. */ 32 return name + ": " + msg; 33 } 34 35 function ErrorToStringWithTrailingNewline() { 36 return FUN_APPLY(ErrorToString, this, []) + "\n"; 37 }