mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-16 05:00:59 +08:00
Chris Tate
a16ee028ee
- Evolving-any receivers holding checked-dynamic values take keyed writes with ToPropertyKey-exact key spelling; dyn-keyed reads gain the same key stringification - Array destructuring over dyn sources packs via the spread walk with V8's exact non-iterable TypeError wordings - The dyn keyed-write miss error appends the primitive's rendering, matching Node # Conflicts: # packages/compiler/src/frontend/lowering/lower-exprs.ts # packages/compiler/src/ir/validate.ts
52 lines
1.5 KiB
JavaScript
52 lines
1.5 KiB
JavaScript
// Array destructuring over checked-dynamic sources (dyn.iterPack): decl,
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// assignment, and callback-param forms; holes, past-the-end undefined,
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// defaults firing exactly on undefined (null passes through), nested
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// patterns, string sources by code point — and V8's destructuring
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// TypeError wordings: the identifier spelling for named sources, the
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// kind wording ("number 5 is not iterable (cannot read property
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// Symbol(Symbol.iterator))") for parameters and expressions.
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'use strict';
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const rows = JSON.parse('[["m1","c1"],["m2","c2"]]');
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rows.forEach(([msg, code]) => console.log('fe', msg, code));
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const first = rows[0];
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const [m, c] = first;
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console.log('decl', m, c);
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const [, tail] = rows[1];
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console.log('hole', tail);
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const [a, b] = JSON.parse('["only"]');
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console.log('past', a, b);
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const [d = 'dflt'] = JSON.parse('[]');
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console.log('default', d);
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const [n = 'dflt'] = JSON.parse('[null]');
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console.log('null-through', n);
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const [[x, y]] = JSON.parse('[[1,2]]');
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console.log('nested', x, y);
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const [c1, c2] = JSON.parse('"hé"');
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console.log('str', c1, c2);
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let p, q;
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[p, q] = rows[1];
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console.log('assign', p, q);
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const bad = JSON.parse('5');
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try {
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const [z] = bad;
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} catch (err) {
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console.log('caught:', err.message);
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}
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try {
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const [z] = JSON.parse('{"a":1}');
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} catch (err) {
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console.log('caught:', err.message);
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}
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const g = ([z]) => z;
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try {
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g(JSON.parse('null'));
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} catch (err) {
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console.log('caught:', err.message);
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}
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try {
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g(JSON.parse('true'));
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} catch (err) {
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console.log('caught:', err.message);
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}
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console.log('done');
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