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-rw-r--r--js/src/builtin/Error.js36
1 files changed, 36 insertions, 0 deletions
diff --git a/js/src/builtin/Error.js b/js/src/builtin/Error.js
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index 000000000..b0fd727eb
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+++ b/js/src/builtin/Error.js
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* ES6 20140718 draft 19.5.3.4. */
+function ErrorToString()
+{
+ /* Steps 1-2. */
+ var obj = this;
+ if (!IsObject(obj))
+ ThrowTypeError(JSMSG_INCOMPATIBLE_PROTO, "Error", "toString", "value");
+
+ /* Steps 3-5. */
+ var name = obj.name;
+ name = (name === undefined) ? "Error" : ToString(name);
+
+ /* Steps 6-8. */
+ var msg = obj.message;
+ msg = (msg === undefined) ? "" : ToString(msg);
+
+ /* Step 9. */
+ if (name === "")
+ return msg;
+
+ /* Step 10. */
+ if (msg === "")
+ return name;
+
+ /* Step 11. */
+ return name + ": " + msg;
+}
+
+function ErrorToStringWithTrailingNewline()
+{
+ return FUN_APPLY(ErrorToString, this, []) + "\n";
+}