mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-11-01 07:33:12 +08:00
Chris Tate
85fdf4ce74
- A typed write or transform callback whose encoding parameter is a pointer union with an undefined arm receives the null pointer directly when an object-mode write passed no encoding, instead of converting the encoding value through a dyn box (scr_stream_chunk_encoding_undefined). - The stream completion callbacks carry SCR_CLOSURE_KIND_RECEIVER_FREE: their thunks never read `this`, so compiled callers skip the receiver bracket. - The completion thunks borrow the stream from the closure's box instead of retaining and releasing it on every call; the closure, alive for the call, holds the box. - settle_next, entry_convert and clear_buffer_each test their early-out conditions in inline wrappers before calling the full functions. A corpus program covers the encoding argument in object mode, byte mode and transforms.
43 lines
1.3 KiB
TypeScript
43 lines
1.3 KiB
TypeScript
// The encoding argument a typed write or transform callback receives:
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// undefined for an object-mode write without one, the given string with
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// one, and 'buffer' for byte-mode chunks.
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import { Transform, Writable } from "node:stream";
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const seen: string[] = [];
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const objects = new Writable({
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objectMode: true,
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write(chunk: { n: number }, encoding, cb) {
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seen.push(`object ${chunk.n} ${typeof encoding} ${String(encoding)}`);
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cb();
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},
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});
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objects.write({ n: 1 });
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objects.write({ n: 2 }, "utf8");
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objects.write({ n: 3 }, undefined);
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objects.end(() => {
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const bytes = new Writable({
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write(chunk: Buffer, encoding, cb) {
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seen.push(`bytes ${chunk.length} ${typeof encoding} ${String(encoding)}`);
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cb();
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},
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});
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bytes.write("abc");
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bytes.write(Buffer.from("de"));
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bytes.end(() => {
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const upper = new Transform({
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objectMode: true,
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transform(row: { n: number }, encoding, cb) {
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seen.push(`transform ${row.n} ${typeof encoding} ${String(encoding)}`);
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cb(null, { n: row.n * 10 });
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},
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});
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upper.on("data", (row: { n: number }) => seen.push(`data ${row.n}`));
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upper.on("end", () => {
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for (const line of seen) console.log(line);
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});
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upper.write({ n: 4 });
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upper.write({ n: 5 }, "latin1");
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upper.end();
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});
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});
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