mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-11-01 07:33:12 +08:00
Chris Tate
6b6445ab90
- The ratified rename rider (world-unification §7 lane 5): "DOM" collided with the browser DOM and, post-lane-1, the structure is no longer a document tree. Comments and doc prose now say "the checked-dynamic tree" for the noun and "dyn" adjectivally; runtime symbol names (scr_dyn_*), the error.domClone libCall, and the real web DOMException family are unchanged. - The few user-facing strings carrying the nickname move with it (the structuredClone cyclic message, the dc subscriber/publish fences, two emitter ICE texts); diagnostics snapshots regenerated (96 pass). One private compiler constant (DOM_PROTO_METHOD_NAMES -> DYN_PROTO_METHOD_NAMES) rides along. - Mechanical sweep, 142 files, comments/prose only — no behavior change.
51 lines
1.9 KiB
JavaScript
51 lines
1.9 KiB
JavaScript
// Variadic JS functions and function-instance properties: zero-param
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// bodies reading `arguments` (the mustCall wrapper's shape), spelled
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// ...args rest params, JS arity through boxed calls, computed record
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// keys with runtime values, dyn strict equality, dyn member ++, and
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// Object.defineProperties onto a function value (the property table
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// lives on the closure, so every reference sees it).
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'use strict';
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// (Array.isArray(arguments) answers true here where Node says false —
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// the checked-dynamic tree carries a real array; SEMANTICS.md — so it stays unprobed.)
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function collect() {
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return `n=${arguments.length} first=${arguments[0]}`;
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}
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const c = collect;
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console.log(c());
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console.log(c('a'));
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console.log(c(1, 2, 3));
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function tail(head, ...rest) {
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return `${head} then ${rest.length}: ${rest.join(',')}`;
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}
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const t = tail;
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console.log(t('x'));
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console.log(t('x', 1));
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console.log(t('x', 1, 2, 3));
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// Computed keys evaluate at runtime, in source order; later duplicate
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// keys win; `in` answers presence, ++ writes through the checked-dynamic tree.
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function build(field, n) {
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const rec = { [field]: n, actual: 0, [field + '2']: n * 2 };
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rec.actual++;
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rec.actual += 4;
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return rec;
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}
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const r = build('exact', 3);
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console.log('exact' in r, 'minimum' in r, r.exact, r.exact2, r.actual);
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console.log(r.actual === 5, r.exact !== r.exact2);
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// defineProperties over a function value: name/length become readable
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// own properties (flags are accepted and ignored — SEMANTICS.md).
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function target() { return arguments.length; }
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const wrapped = target;
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Object.defineProperties(wrapped, {
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name: { value: 'renamed', writable: false, enumerable: false, configurable: true },
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extra: { value: 41, writable: true, enumerable: true, configurable: true },
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});
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console.log('name', wrapped.name, 'extra', wrapped.extra);
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console.log('still callable', wrapped(9, 8));
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console.log('done');
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