ts-data-forge/dist/functional/ternary-result/impl/ternary-result-fold.d.mts

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import { type UnwrapErr, type UnwrapOk, type UnwrapWarn } from './types.mjs';
/**
 * Applies the provided mapper based on the current variant.
 *
 * @example
 *
 * ```ts
 * const okFold = TernaryResult.fold(
 *   TernaryResult.ok(2),
 *   (value) => value * 2,
 *   (warn: string) => warn.length,
 *   (error: string) => error.toUpperCase(),
 * );
 *
 * const warnFold = TernaryResult.fold(
 *   TernaryResult.warn(2, 'spike'),
 *   (value: number) => value,
 *   (warn: string) => warn.toUpperCase(),
 *   (error: string) => error,
 * );
 *
 * assert.deepStrictEqual(okFold, TernaryResult.ok(4));
 *
 * assert.deepStrictEqual(warnFold, TernaryResult.warn(2, 'SPIKE'));
 * ```
 */
export declare function fold<R extends UnknownTernaryResult, S2, W2, E2>(result: R, mapOk: (value: UnwrapOk<R>) => S2, mapWarn: (value: UnwrapWarn<R>) => W2, mapErr: (error: UnwrapErr<R>) => E2): TernaryResult<S2, E2, W2>;
export declare function fold<S, W, E, S2, W2, E2>(mapOk: (value: S) => S2, mapWarn: (value: W) => W2, mapErr: (error: E) => E2): (result: TernaryResult<S, E, W>) => TernaryResult<S2, E2, W2>;
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