Function variadic

src/patterns.ts:148–163

(pattern: pattern)

}

const variadic = <pattern extends {}>(pattern: pattern): Variadic<pattern> =>
  Object.assign(pattern, {
    [Symbol.iterator](): Iterator<pattern, void, undefined> {
      let i = 0;
      const variadicPattern = Object.assign(pattern, {
        [symbols.isVariadic]: true,
      });
      const values: IteratorResult<pattern, void>[] = [
        { value: variadicPattern, done: false },
        { done: true, value: undefined },
      ];
      return {
        next: () => values[i++] ?? values.at(-1)!,
      };
    },
  });

function arrayChainable<pattern extends Matcher<any, any, any, any, any>>(
  pattern: pattern