mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-19 05:29:46 +08:00
Chris Tate
08115a1d3d
- Share symbol-keyed global caches across statically compiled modules. - Preserve assignment results and evaluation order for native fields, accessors, and nullish defaults. - Read omitted options correctly in specialized JavaScript package calls.
27 lines
1.0 KiB
TypeScript
27 lines
1.0 KiB
TypeScript
let trace = "";
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class Counter {
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stored = 1;
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get value(): number { trace += "get;"; return this.stored; }
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set value(value: number) { trace += "set;"; this.stored = value; }
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}
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let current = new Counter();
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const first = current;
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function receiver(): Counter { trace += "receiver;"; return current; }
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function replacement(): number { trace += "rhs;"; current = new Counter(); return 4; }
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console.log(receiver().value += replacement(), first.stored, current.stored, trace);
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trace = "";
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console.log(receiver().value = replacement(), current.stored, trace);
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const record = { a: 1, nested: { value: 2 }, text: "a" };
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console.log(record.a = 7, record.nested.value *= 3, record.text += "b");
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console.log(JSON.stringify(record));
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const key = Symbol("value");
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class Keyed {
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[key] = 2;
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}
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const keyed = new Keyed();
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console.log(keyed[key] += 5, keyed[key]);
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let sideEffects = 0;
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function fail(): number { sideEffects++; throw new Error("failed rhs"); }
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try { console.log(record.a += fail()); }
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catch (e) { if (e instanceof Error) console.log(e.message, record.a, sideEffects); }
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