mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-22 05:59:31 +08:00
Chris Tate
385f0fb80c
- Move CommonJS export detection and package rewrites onto shared native syntax with explicit dependency resolution. - Preserve complete bundled-helper matching, significant line breaks, and deep source traversal without the TypeScript 5 parser. - Compile optional string indexing and exercise the production CommonJS passes in native executables.
77 lines
2.2 KiB
TypeScript
77 lines
2.2 KiB
TypeScript
function show(value: string | undefined): void {
|
|
console.log(value === undefined ? "missing" : JSON.stringify(value));
|
|
}
|
|
|
|
function at(text: string, index: number): string | undefined {
|
|
return text[index];
|
|
}
|
|
|
|
const samples = ["", "abc", "a\0b", "é工作"];
|
|
const indices = [-Infinity, -2, -1, -0, 0, 0.1, 0.9, 1, 1.1, 2, 3, 4, 100, 1e100, Infinity, NaN];
|
|
for (const text of samples) {
|
|
console.log("sample", JSON.stringify(text));
|
|
for (const index of indices) show(at(text, index));
|
|
}
|
|
|
|
// Surrogate-splitting values retain the runtime's documented U+FFFD
|
|
// boundary. These probes test UTF-16 bounds without splitting a pair.
|
|
show(at("😀x", 2));
|
|
show(at("😀x", 3));
|
|
show(at("😀x", 0.5));
|
|
|
|
let text = "before";
|
|
let events = "";
|
|
function receiver(): string {
|
|
events += "receiver;";
|
|
return text;
|
|
}
|
|
function key(index: number): number {
|
|
events += "key;";
|
|
text = "after";
|
|
return index;
|
|
}
|
|
show(receiver()[key(0)]);
|
|
console.log(events, text);
|
|
text = "before";
|
|
events = "";
|
|
show(text[key(0)]);
|
|
console.log(events, text);
|
|
events = "";
|
|
show(receiver()[key(NaN)]);
|
|
console.log(events);
|
|
|
|
function throwingReceiver(): string { events += "throw receiver;"; throw new Error("receiver"); }
|
|
function throwingKey(): number { events += "throw key;"; throw new Error("key"); }
|
|
events = "";
|
|
try { show(throwingReceiver()[key(0)]); }
|
|
catch (error) { console.log((error as Error).message, events); }
|
|
events = "";
|
|
try { show(receiver()[throwingKey()]); }
|
|
catch (error) { console.log((error as Error).message, events); }
|
|
|
|
function fallback(): string { events += "fallback;"; return "none"; }
|
|
events = "";
|
|
console.log(at("yes", 0) ?? fallback());
|
|
console.log(at("yes", -1) ?? fallback());
|
|
console.log(events);
|
|
|
|
function captured(text: string): () => string | undefined {
|
|
let index = 0;
|
|
return () => text[index++];
|
|
}
|
|
const next = captured("xy");
|
|
show(next()); show(next()); show(next());
|
|
|
|
class Source {
|
|
reads = 0;
|
|
get text(): string { this.reads++; return "get"; }
|
|
}
|
|
const source = new Source();
|
|
show(source.text[1]);
|
|
show(source.text[100]);
|
|
console.log("reads", source.reads);
|
|
|
|
const retained = [at("abc", 1), at("abc", 100), at("abc", -1)];
|
|
for (const value of retained) show(value);
|
|
console.log("done");
|