ts-data-forge/dist/functional/ternary-result/impl/ternary-result-zip.mjs

[](https://www.npmjs.com/package/ts-data-forge) [](https://www.npmjs.com/package/ts-data-forge) [![License](https://img.shields.

import { isErr } from './ternary-result-is-err.mjs';
import { isWarn } from './ternary-result-is-warn.mjs';
import { ok } from './ternary-result-ok.mjs';
import { warn } from './ternary-result-warn.mjs';

/**
 * Combines two `TernaryResult`s, prioritising Err over Warn over Ok.
 *
 * @example
 *
 * ```ts
 * const okPair = TernaryResult.zip(TernaryResult.ok('left'), TernaryResult.ok(1));
 *
 * const warnPair = TernaryResult.zip(
 *   TernaryResult.warn('left', 'warn'),
 *   TernaryResult.ok(1),
 * );
 *
 * const errPair = TernaryResult.zip(
 *   TernaryResult.ok('left'),
 *   TernaryResult.err('err'),
 * );
 *
 * assert.deepStrictEqual(okPair, TernaryResult.ok(['left', 1] as const));
 *
 * assert.deepStrictEqual(
 *   warnPair,
 *   TernaryResult.warn(['left', 1] as const, 'warn'),
 * );
 *
 * assert.deepStrictEqual(errPair, TernaryResult.err('err'));
 * ```
 */
const zip = (resultA, resultB) => {
    if (isErr(resultA)) {
        return resultA;
    }
    if (isErr(resultB)) {
        return resultB;
    }
    const pair = [resultA.value, resultB.value];
    if (isWarn(resultA)) {
        return warn(pair, resultA.warning);
    }
    if (isWarn(resultB)) {
        return warn(pair, resultB.warning);
    }
    return ok(pair);
};

export { zip };
//# sourceMappingURL=ternary-result-zip.mjs.map