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Chris Tate
c257368c5e
* Compile Effect generators statically * test: declare the dormant array write's expected fence
30 lines
1007 B
JavaScript
30 lines
1007 B
JavaScript
const data = Symbol.for("computed.data");
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const method = Symbol.for("computed.method");
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const absent = Symbol("absent");
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class Base {
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[data] = 7;
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[method](amount) { return this[data] + amount; }
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}
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class Child extends Base {
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[method](amount) { return this[data] * amount; }
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}
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function probe(value, key) {
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console.log(key in value, Object.hasOwn(value, key), Object.prototype.propertyIsEnumerable.call(value, key));
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}
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function read(value, key) { return value[key]; }
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function write(value, key, stored) { value[key] = stored; }
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function invoke(value, key, amount) { return value[key](amount); }
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const base = new Base();
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const child = new Child();
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probe(base, data);
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probe(base, method);
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probe(child, data);
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probe(child, method);
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probe(child, absent);
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console.log(read(base, data), invoke(base, method, 3), invoke(child, method, 3));
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write(child, data, 11);
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console.log(read(child, data), invoke(child, method, 3));
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write(child, absent, "added");
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console.log(read(child, absent));
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probe(child, absent);
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