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Chris Tate
0e764aad1b
* Support stored Map and Set iterators in static builds * Record collection iterator parity baselines
23 lines
784 B
TypeScript
23 lines
784 B
TypeScript
// Supported collection forms stay beside their remaining refusal boundaries.
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const m = new Map<string, number>();
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// Entry-seeded construction lowers for an array literal of pair literals
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// at the construction site and for [K, V][]-typed tuple-array values;
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// another Map can also seed construction.
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const seeded = new Map(m);
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// Stored keys()/values()/entries() iterators compile natively.
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const ks = m.keys();
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const vs = m.values();
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const es = m.entries();
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// Map spreads also compile.
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const spread = [...m];
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// set() returns the same Map, so chained mutations compile.
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m.set("a", 1).set("b", 2);
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// The forEach callback receives (value, key) — no third map parameter.
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m.forEach((v, k, theMap) => console.log(k, v));
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// The unsupported callback must produce a diagnostic.
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