// Copyright (C) 2016 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-regexp.prototype.compile
es6id: B.2.5.1
description: Behavior when `lastIndex` property of "this" value is non-writable
info: |
[...]
3. If Type(pattern) is Object and pattern has a [[RegExpMatcher]] internal
slot, then
a. If flags is not undefined, throw a TypeError exception.
b. Let P be the value of pattern's [[OriginalSource]] internal slot.
c. Let F be the value of pattern's [[OriginalFlags]] internal slot.
4. Else,
[...]
5. Return ? RegExpInitialize(O, P, F).
21.2.3.2.2 Runtime Semantics: RegExpInitialize
[...]
12. Perform ? Set(obj, "lastIndex", 0, true).
---*/
var subject = /initial/;
Object.defineProperty(subject, 'lastIndex', { value: 45, writable: false });
assert.throws(TypeError, function() {
subject.compile(/updated/gi);
});
assert.sameValue(
subject.toString(),
new RegExp('updated', 'gi').toString(),
'[[OriginalSource]] internal slot'
);
assert.sameValue(subject.lastIndex, 45);