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https://github.com/vercel-labs/scriptc.git
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Chris Tate
4d3ee3fffd
- Array patterns over strings split by code points via the string-iterator machinery: positions, holes, defaults, rest, nesting, and for-of heads - Destructured stdlib-global members bind their builtin identity tokens with Node-agreeing === identity; aliases register the twin - Surfaced-global members like Math.max fence eagerly by name — a token would quietly degrade them - Object patterns over strings bind length; wrapper-method extraction names the detached method # Conflicts: # packages/compiler/test/ts7/baselines/order-parity.json
31 lines
1.2 KiB
JavaScript
31 lines
1.2 KiB
JavaScript
'use strict';
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// Destructuring a STDLIB GLOBAL in a JavaScript file binds member
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// IDENTITY TOKENS (the identifier chokepoint's rule one member deep):
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// one global, one member, one interned string, so identity and
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// truthiness agree with Node across every spelling, while what a token
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// cannot do meets per-site rules lazily at each use. This program pins
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// the AGREEING operations — identity across destructures, identity with
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// the property spelling, truthiness — under the Node oracle.
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const { crypto: wc } = globalThis;
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console.log(!!wc);
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console.log(wc === globalThis.crypto);
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const { subtle } = globalThis.crypto;
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const { subtle: again } = globalThis.crypto;
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console.log(subtle === again);
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console.log(!!subtle);
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// A member destructured from the aliased binding IS the same member.
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const { subtle: viaAlias } = wc;
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console.log(viaAlias === subtle);
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const { Console } = console;
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console.log(!!Console);
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// A globalThis member with a REAL surface destructures as the global
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// itself (the stdlibGlobalAliasDecl twin): receiver uses route through
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// the same lowerings as the bare spelling.
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const { Math: M } = globalThis;
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console.log(M.max(1, 2));
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console.log(M === globalThis.Math);
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