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/*
* A String object has a special [[GetOwnProperty]] implementation which special
* cases array indexes in the range [0, strlen-1], and gives them the attributes:
*
* - [[Enumerable]]: true
* - [[Writable]]: false
* - [[Configurable]]: false
*
*/
/*===
0 string
1 string
2 string
===*/
var a = "foo"; /* no need to create explicit object, ToObject coercion suffices */
var i;
try {
for (i in a) {
/* since keys are enumerable, all indices should appear here */
print(i, typeof i);
}
} catch (e) {
print(e.name);
}
/* FIXME: check property descriptors */
/*===
o
z
3
===*/
a = new String("foo");
a[2] = 'z'; /* virtual property is not Writable, ignored */
print(a[2]);
a[3] = 'z'; /* virtual property does not exist, so does NOT prevent a write */
print(a[3]);
print(a.length); /* length is not affected because strings don't have a magic 'length' */