mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-28 06:53:42 +08:00
Malte UblandClaude Opus 5.5
1090c05dfe
chalk's callable builder (a function whose prototype chain is set with
Object.setPrototypeOf, with style getters from Object.defineProperties)
already ran on the checked-dynamic model. What failed was the code
around it. Each fix is general and sits on a path that used to end in a
refusal or a runtime fence, or is confined to JavaScript files:
- package.json "imports" inside a --npm-static package resolve to the
shipped JS with the "node" condition hoisted, like the tsgo fs shadow;
- JavaScript object literals that the file reshapes at run time (keyed
writes with runtime keys, delete, Object.defineProperty/ies) map to
the checked-dynamic type, with the literals nested in them;
- a JavaScript class whose only member is a constructor that returns a
value and never reads `this` answers that value from `new` (the return
used to be discarded silently);
- `const { env } = process` binds the data member in JavaScript;
- `o && x` / `o || x` with an always-truthy object, array or function
left operand;
- Number.parseInt/parseFloat over checked-dynamic values apply ToString;
- Function.prototype as a value is one compiler-emitted function;
- calls of String.prototype-only names (bold, italics, ...) on untyped
receivers call the receiver's own or inherited member; a string
receiver throws the refusal at run time.
Programs without these patterns compile to identical bytes: the runtime
benchmark workloads, the self-hosted compiler (LLVM and executable) and
the TypeScript corpus IR were compared against the baseline.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
13 lines
498 B
JavaScript
13 lines
498 B
JavaScript
// Data members of the process object taken off by destructuring.
|
|
import process from "node:process";
|
|
|
|
const { env, argv, platform } = process;
|
|
console.log(env.SCRIPTC_TEST_ENV, "SCRIPTC_TEST_ENV" in env, "SCRIPTC_NOT_SET_ANYWHERE" in env);
|
|
console.log(Array.isArray(argv), typeof argv[0], platform === process.platform);
|
|
|
|
function readFlags() {
|
|
const { env: environment, pid } = process;
|
|
return [typeof environment.SCRIPTC_TEST_ENV, pid === process.pid];
|
|
}
|
|
console.log(readFlags().join(" "));
|