mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-23 06:10:02 +08:00
Chris Tate
1f10e83720
- Preserve callback identity, receiver binding, and class references across unions and collections. - Track record field presence independently of undefined values and improve native runtime behavior. - Expand differential coverage and streamline CI bootstrap and compiler rebuild checks.
43 lines
1.4 KiB
TypeScript
43 lines
1.4 KiB
TypeScript
class Entry {
|
|
value = 1;
|
|
}
|
|
class Detailed extends Entry {
|
|
extra = 9;
|
|
}
|
|
function combine(first: Entry[], rest: Detailed[]): Entry[] {
|
|
return first.concat(rest, new Detailed(), [new Detailed()]);
|
|
}
|
|
const detail = new Detailed();
|
|
const combined = combine([new Entry()], [detail]);
|
|
combined[1].value = 4;
|
|
console.log(combined.length, detail.value, combined[1] === detail);
|
|
const values: (number | string)[] = ["start"];
|
|
const numbers = [1, , 3] as number[];
|
|
const absent: number[] = [];
|
|
numbers.length = 5;
|
|
numbers[3] = absent[0];
|
|
const result = values.concat(numbers, "end", [6]);
|
|
console.log(result.length, result.join("|"));
|
|
for (let i = 0; i < result.length; i++) console.log(i, i in result, result[i] === undefined);
|
|
console.log(numbers.length, 1 in numbers, 3 in numbers, 4 in numbers);
|
|
const later: number[] = [2];
|
|
const log: string[] = [];
|
|
function first(): (number | string)[] {
|
|
log.push("receiver");
|
|
return values;
|
|
}
|
|
function mutate(): string {
|
|
log.push("argument");
|
|
later.push(3);
|
|
values.push("changed");
|
|
return "last";
|
|
}
|
|
console.log(first().concat(later, mutate()).join("|"), log.join("|"));
|
|
const narrow: (number | boolean)[] = [false, 4];
|
|
const wide: (number | boolean | string)[] = ["wide"];
|
|
console.log(wide.concat(narrow).join("|"));
|
|
const nested: Entry[][] = [[new Entry()]];
|
|
const inner: Entry[] = [detail];
|
|
const tail: Entry[][] = [inner];
|
|
console.log(nested.concat(tail).length, nested.concat(tail)[1] === inner);
|