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Malte UblandClaude Opus 5.5
30e23af63f
A class field typed `Headers`, `Request`, or `Response` (or an array or nullable form of them) maps to checked-dynamic storage, and the class-field rule refused it (SC1090) although `unknown`, Map values, and closures already store the same native handles. Such fields now take the checked-dynamic slot, like the worker handles; reads keep the handle's identity and the static fetch member lowering. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
37 lines
1.4 KiB
TypeScript
37 lines
1.4 KiB
TypeScript
// Class fields typed as native fetch handles (Headers, Request, Response),
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// directly, optional, nullable, in arrays, and inside record fields, hold
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// the live handle: mutation through one reference is seen through another.
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class Holder {
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headers: Headers;
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list: Headers[] = [];
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maybe?: Response;
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req: Request | null = null;
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bag: { headers: Headers; status: number };
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constructor(headers: Headers) {
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this.headers = headers;
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this.bag = { headers, status: 1 };
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}
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}
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const holder = new Holder(new Headers({ a: "1" }));
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console.log(holder.headers.get("a"), holder.list.length, holder.maybe === undefined, holder.req);
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holder.list.push(new Headers({ b: "2" }));
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holder.maybe = new Response("x", { status: 201 });
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holder.req = new Request("http://localhost/p", { method: "POST" });
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console.log(holder.list[0]!.get("b"), holder.maybe.status, holder.req.method, holder.req.url);
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holder.headers.set("c", "3");
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console.log(holder.bag.headers.get("c"), holder.bag.headers === holder.headers);
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// Symbol-keyed fields hold the handles the same way.
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const NATIVE = Symbol("native");
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class Wrapper {
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[NATIVE]: Response;
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constructor(body: string) {
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this[NATIVE] = new Response(body, { status: 202 });
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}
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get status(): number {
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return this[NATIVE].status;
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}
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}
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const wrapped = new Wrapper("ok");
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console.log(wrapped.status, wrapped[NATIVE].headers.get("content-type"));
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