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// |jit-test| --fast-warmup; --no-threads
// Generators and async functions that need an arguments object.
function* gSum() {
let s = 0;
for (let i = 0; i < arguments.length; i++) {
s += arguments[i];
yield s;
}
return s;
}
// arguments live across a suspend in a nested loop.
function* gNested(n) {
let s = 0;
for (let i = 0; i < arguments.length; i++) {
for (let j = 0; j < n; j++) {
s += arguments[i] + j;
yield s;
}
}
return s;
}
// arguments delegated through yield*.
function* delegInner(a) {
for (let i = 0; i < a.length; i++) {
yield a[i];
}
return "end";
}
function* gYieldStar() {
yield* delegInner(arguments);
return arguments.length;
}
// Mapped arguments in sloppy mode mutating a formal.
function* gMapped(a, b) {
let capture = () => arguments;
let s = 0;
for (let i = 0; i < 3; i++) {
a += 1;
s += capture()[0] + capture().length;
yield s;
}
return s;
}
// The restored object must be the one the fresh-call prologue created.
function* gIdentity(a) {
const saved = arguments;
yield "x";
return saved === arguments;
}
function drive(g) {
let out = [], r;
while (!(r = g.next()).done) {
out.push(String(r.value));
}
out.push(String(r.value));
return out.join(",");
}
const cases = [
["sum", () => gSum(1, 2, 3, 4), "1,3,6,10,10"],
["nested", () => gNested(2, 10, 20), "2,5,15,26,46,67,67"],
["yieldStar", () => gYieldStar(5, 6, 7), "5,6,7,3"],
["mapped", () => gMapped(10, 20), "13,27,42,42"],
["identity", () => gIdentity(1), "x,true"],
];
for (let i = 0; i < 200; i++) {
for (const [name, mk, expected] of cases) {
assertEq(drive(mk()), expected, name);
}
}
// Async function using arguments across an await.
async function aSum() {
let s = 0;
for (let i = 0; i < arguments.length; i++) {
s += await arguments[i];
}
return s;
}
let asyncFailure = null;
(async function () {
for (let i = 0; i < 200; i++) {
assertEq(await aSum(1, 2, 3, 4), 10);
}
})().catch(e => { asyncFailure = e; });
drainJobQueue();
assertEq(asyncFailure, null);