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Malte UblandClaude Opus 5.5
700f59c1b2
T10 and T12 of the zero-cost compatibility plan, plus the maintainer decisions: - Programs that name Temporal type-check against TS 7's temporal lib (added only for them) and lower to Node 24's answers: typeof is "undefined", globalThis.Temporal is undefined, other uses throw ReferenceError at the root read. - node:v8 is importable; getHeapStatistics answers allocator-derived figures in Node's shape; other members fence with the by-design reason. vm's refusal says why. - node:stream/web exports the web stream globals themselves. - node:dns/promises and dns.promises: lookup and lookupService as promises, in the link-gated scr_dns_promises.c unit. - eval and the Function constructor throw Node's EvalError under --disallow-code-generation-from-strings; the corpus harness runs the Node oracle with that flag for `// @disallow-code-generation`. - graceful-fs is served as node:fs. Every new lowering replaces a refusal, and the new runtime code links only when used, so other programs compile to identical bytes (zero-cost gate). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
37 lines
963 B
JavaScript
37 lines
963 B
JavaScript
// @disallow-code-generation
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// The probe packages ship (zod 4's allowsEval): an aliased Function
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// constructor inside try/catch decides between a generated fast path and
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// an interpreted fallback. Arguments convert to strings before the
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// refusal, calling an object's toString.
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const F = Function;
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function allowsEval() {
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try {
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new F("");
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return true;
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} catch (e) {
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console.log("probe:", e.constructor === EvalError, e.message);
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return false;
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}
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}
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const parse = allowsEval()
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? new F("input", "return input.trim()")
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: (input) => input.trim();
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console.log(JSON.stringify(parse(" value ")));
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try {
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new Function({ toString() { console.log("toString called"); return "x"; } }, "return x");
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} catch (e) {
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console.log(String(e));
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}
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try {
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eval({ toString() { console.log("never called"); return "1"; } });
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} catch (e) {
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console.log(String(e));
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}
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const indirect = eval;
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try {
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indirect("1");
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} catch (e) {
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console.log(e.name);
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}
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