5732492970

pending completion

Build # 5732492970

Build Type

push

github

Committed by

slikts

Commit Message

chore: update pre-push hook

Run Details

39 of 40 branches covered (97.5%)

Branch coverage included in aggregate %.

94 of 95 relevant lines covered (98.95%)

125.48 hits per line

Source File
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100.0

/src/Tuple.ts

import { getNode, registry } from './graph.ts';

const TupleConstructor = class Tuple<A extends readonly unknown[]> extends Array {
  constructor(values: A) {
    super();
    this.push(...values);
    Object.freeze(this);
  }
};

export function Tuple<A extends unknown[]>(...path: A): Readonly<A> {
  if (new.target) {
    throw new TypeError('Tuple is not a constructor');
  }

  if (path.length === 0) {
    // Shortcut for 0-tuples
    return tuple0 as any;
  }

  const node = getNode(path);
  const derefed = node.tuple?.deref();
  if (derefed) {
    return derefed as A;
  }
  const tuple = new TupleConstructor<A>(path);
  node.tuple = new WeakRef(tuple);
  registry.register(tuple, path);

  return tuple as A;
}

// Allow `instanceof` checks with the helper function as if it were a constructor
Object.defineProperty(Tuple, Symbol.hasInstance, {
  value: (instance: unknown) => instance instanceof TupleConstructor,
  writable: false,
  configurable: false,
});

// 0-tuple singleton
const tuple0 = new TupleConstructor([]);

1	import { getNode, registry } from './graph.ts';
2
3	const TupleConstructor = class Tuple<A extends readonly unknown[]> extends Array {	1✔
4	constructor(values: A) {
5	super();	13✔
6	this.push(...values);	13✔
7	Object.freeze(this);	13✔
8	}
9	};
10
11	export function Tuple<A extends unknown[]>(...path: A): Readonly<A> {
12	if (new.target) {	25✔
13	throw new TypeError('Tuple is not a constructor');	1✔
14	}
15
16	if (path.length === 0) {	24✔
17	// Shortcut for 0-tuples
18	return tuple0 as any;	6✔
19	}
20
21	const node = getNode(path);	18✔
22	const derefed = node.tuple?.deref();	18✔
23	if (derefed) {	18✔
24	return derefed as A;	6✔
25	}
26	const tuple = new TupleConstructor<A>(path);	12✔
27	node.tuple = new WeakRef(tuple);	12✔
28	registry.register(tuple, path);	12✔
29
30	return tuple as A;	12✔
31	}
32
33	// Allow `instanceof` checks with the helper function as if it were a constructor
34	Object.defineProperty(Tuple, Symbol.hasInstance, {	1✔
35	value: (instance: unknown) => instance instanceof TupleConstructor,	1✔
36	writable: false,
37	configurable: false,
38	});
39
40	// 0-tuple singleton
41	const tuple0 = new TupleConstructor([]);	1✔

slikts / tuplerone / 5732492970

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