mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-02 08:35:07 +08:00
Chris Tate
b40a6f6079
- Keep generic bindings and short-circuit writes scoped to their native execution context. - Compile Map and Set copies, tuple callbacks and searches, and string-pattern replacement. - Exercise production frontend registries without Node and preserve mutation, identity, and evaluation order.
31 lines
1.3 KiB
JavaScript
31 lines
1.3 KiB
JavaScript
let effects = "";
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const object = JSON.parse('{"zero":0,"text":"ok","nothing":null,"flag":false}');
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function receiver() { effects += "O"; return object; }
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/** @param {string} value */
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function key(value) { effects += "K"; return value; }
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function value(next) { effects += "V"; return next; }
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console.log(receiver()[key("zero")] &&= value(1), effects);
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console.log(receiver()[key("zero")] ||= value(2), effects);
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console.log(receiver()[key("text")] ||= value("skip"), effects);
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console.log(receiver()[key("text")] &&= value("changed"), effects);
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console.log(object.nothing &&= value(3), effects);
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console.log(object.flag ||= value(true), effects);
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console.log(object.missing ||= value("new"), effects);
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console.log(JSON.stringify(object));
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// Accessor calls cross the checked native object boundary. Reading once
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// and preserving the raw RHS result are observable even when setters mutate.
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const accessors = JSON.parse("{}");
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let stored = 0;
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Object.defineProperty(accessors, "item", {
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get() { effects += "G"; return stored; },
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set(next) { effects += "S"; stored = next + 10; },
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enumerable: true,
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});
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effects = "";
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console.log(accessors.item &&= value(4), stored, effects);
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effects = "";
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console.log(accessors.item ||= value(5), stored, effects);
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effects = "";
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console.log(accessors.item &&= value(6), stored, effects);
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