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// BigInt literals as property keys.
{
let o = {
0n: "0",
1n: "1",
// 2**31
2147483647n: "2^31-1",
2147483648n: "2^31",
2147483649n: "2^31+1",
// 2**32
4294967295n: "2^32-1",
4294967296n: "2^32",
4294967297n: "2^32+1",
// 2n**63n
9223372036854775807n: "2^63-1",
9223372036854775808n: "2^63",
9223372036854775809n: "2^63+1",
// 2n**64n
18446744073709551615n: "2^64-1",
18446744073709551616n: "2^64",
18446744073709551617n: "2^64+1",
};
assertEq(o[0], "0");
assertEq(o[1], "1");
assertEq(o[2147483647], "2^31-1");
assertEq(o[2147483648], "2^31");
assertEq(o[2147483649], "2^31+1");
assertEq(o[4294967295], "2^32-1");
assertEq(o[4294967296], "2^32");
assertEq(o[4294967297], "2^32+1");
assertEq(o["9223372036854775807"], "2^63-1");
assertEq(o["9223372036854775808"], "2^63");
assertEq(o["9223372036854775809"], "2^63+1");
assertEq(o["18446744073709551615"], "2^64-1");
assertEq(o["18446744073709551616"], "2^64");
assertEq(o["18446744073709551617"], "2^64+1");
}
// With non-decimal different base.
{
let o = {
0b1n: "1",
0o2n: "2",
0x3n: "3",
};
assertEq(o[1], "1");
assertEq(o[2], "2");
assertEq(o[3], "3");
}
// With numeric separators.
{
let o = {
1_2_3n: "123",
};
assertEq(o[123], "123");
}
// BigInt literals as method property names.
{
let o = {
1n() {},
*2n() {},
async 3n() {},
async* 4n() {},
get 5n() {},
set 6n(x) {},
};
assertEqArray(Object.getOwnPropertyNames(o), [
"1", "2", "3", "4", "5", "6",
]);
assertEq(o[1].name, "1");
assertEq(o[2].name, "2");
assertEq(o[3].name, "3");
assertEq(o[4].name, "4");
assertEq(Object.getOwnPropertyDescriptor(o, 5).get.name, "get 5");
assertEq(Object.getOwnPropertyDescriptor(o, 6).set.name, "set 6");
}
// BigInt literals as class method property names.
{
class C {
1n() {}
*2n() {}
async 3n() {}
async* 4n() {}
get 5n() {}
set 6n(x) {}
}
let o = C.prototype;
assertEqArray(Object.getOwnPropertyNames(o), [
"1", "2", "3", "4", "5", "6",
"constructor",
]);
assertEq(o[1].name, "1");
assertEq(o[2].name, "2");
assertEq(o[3].name, "3");
assertEq(o[4].name, "4");
assertEq(Object.getOwnPropertyDescriptor(o, 5).get.name, "get 5");
assertEq(Object.getOwnPropertyDescriptor(o, 6).set.name, "set 6");
}
// BigInt literals as static class method property names.
{
class C {
static 1n() {}
static *2n() {}
static async 3n() {}
static async* 4n() {}
static get 5n() {}
static set 6n(x) {}
}
let o = C;
// NB: Sort names because lazily resolved "length" and "name" properties are
// inserted in the wrong order.
assertEqArray(Object.getOwnPropertyNames(o).sort(), [
"1", "2", "3", "4", "5", "6",
"length", "name", "prototype",
]);
assertEq(o[1].name, "1");
assertEq(o[2].name, "2");
assertEq(o[3].name, "3");
assertEq(o[4].name, "4");
assertEq(Object.getOwnPropertyDescriptor(o, 5).get.name, "get 5");
assertEq(Object.getOwnPropertyDescriptor(o, 6).set.name, "set 6");
}
// BigInt literals as class field property names.
{
let o = new class {
1n;
2n = "ok";
};
assertEq(o[1], undefined);
assertEq(o[2], "ok");
}
// In binding destructuring contexts.
{
let {0n: a} = ["ok"];
assertEq(a, "ok");
}
// In binding destructuring contexts with object rest pattern.
{
let {0n: a, ...b} = ["ok", "test"];
assertEq(a, "ok");
assertEqArray(Object.getOwnPropertyNames(b), ["1"]);
}
// In assignment destructuring contexts.
{
let a;
({0n: a} = ["ok"]);
assertEq(a, "ok");
}
// In assignment destructuring contexts with object rest pattern.
{
let a, b;
({0n: a, ...b} = ["ok", "test"]);
assertEq(a, "ok");
assertEqArray(Object.getOwnPropertyNames(b), ["1"]);
}
// BigInt literals as inferred names.
{
let o = {
0xan: function(){},
};
assertEq(o[10].name, "10");
}
if (typeof reportCompare === "function")
reportCompare(true, true);