import { G as GuardType } from './GuardType-C8IpVeqb.js';

type Case<In, Out, When extends (x: In) => boolean = (x: In) => boolean> = readonly [when: When, then: (x: GuardType<When, In> & In) => Out];
declare const conditionalPlus: typeof conditional & {
    defaultCase: typeof defaultCase;
};

/**
 * Executes a transformer function based on the first matching predicate,
 * functioning like a series of `if...else if...` statements. It sequentially
 * evaluates each case and, upon finding a truthy predicate, runs the
 * corresponding transformer, and returns, ignoring any further cases, even if
 * they would match.
 *
 * For simpler cases you should also consider using `when` instead.
 *
 * !IMPORTANT! - Unlike similar implementations in frameworks like Lodash and
 * Ramda, the Remeda implementation does **NOT** return a default/fallback
 * `undefined` value when none of the cases match; and instead will **throw** an
 * exception in those cases.
 * To add a default case use the `conditional.defaultCase` helper as the final
 * case of your implementation. By default it returns `undefined`, but could be
 * provided a transformer in order to return something else.
 *
 * Due to TypeScript's inability to infer the result of negating a type-
 * predicate we can't refine the types used in subsequent cases based on
 * previous conditions. Using a `switch (true)` statement or ternary operators
 * is recommended for more precise type control when such type narrowing is
 * needed.
 *
 * @param cases - A list of (up to 10) tuples, each defining a case. Each tuple
 * consists of a predicate (or a type-predicate) and a transformer function that
 * processes the data if its case matches.
 * @returns The output of the matched transformer. If no cases match, an
 * exception is thrown. The return type is a union of the return types of all
 * provided transformers.
 * @signature
 *   R.conditional(...cases)(data);
 * @example
 *   const nameOrId = 3 as string | number;
 *   R.pipe(
 *     nameOrId,
 *     R.conditional(
 *       [R.isString, (name) => `Hello ${name}`],
 *       [R.isNumber, (id) => `Hello ID: ${id}`],
 *       R.conditional.defaultCase(
 *         (something) => `Hello something (${JSON.stringify(something)})`,
 *       ),
 *     ),
 *   ); //=> 'Hello ID: 3'
 * @dataLast
 * @category Function
 */
declare function conditional<T, Fn0 extends (x: T) => boolean, Fn1 extends (x: T) => boolean, Fn2 extends (x: T) => boolean, Fn3 extends (x: T) => boolean, Fn4 extends (x: T) => boolean, Fn5 extends (x: T) => boolean, Fn6 extends (x: T) => boolean, Fn7 extends (x: T) => boolean, Fn8 extends (x: T) => boolean, Fn9 extends (x: T) => boolean, Return0, Return1 = never, Return2 = never, Return3 = never, Return4 = never, Return5 = never, Return6 = never, Return7 = never, Return8 = never, Return9 = never>(case0: Case<T, Return0, Fn0>, case1?: Case<T, Return1, Fn1>, case2?: Case<T, Return2, Fn2>, case3?: Case<T, Return3, Fn3>, case4?: Case<T, Return4, Fn4>, case5?: Case<T, Return5, Fn5>, case6?: Case<T, Return6, Fn6>, case7?: Case<T, Return7, Fn7>, case8?: Case<T, Return8, Fn8>, case9?: Case<T, Return9, Fn9>): (data: T) => Return0 | Return1 | Return2 | Return3 | Return4 | Return5 | Return6 | Return7 | Return8 | Return9;
/**
 * Executes a transformer function based on the first matching predicate,
 * functioning like a series of `if...else if...` statements. It sequentially
 * evaluates each case and, upon finding a truthy predicate, runs the
 * corresponding transformer, and returns, ignoring any further cases, even if
 * they would match.
 *
 * For simpler cases you should also consider using `when` instead.
 *
 * !IMPORTANT! - Unlike similar implementations in frameworks like Lodash and
 * Ramda, the Remeda implementation does **NOT** return a default/fallback
 * `undefined` value when none of the cases match; and instead will **throw** an
 * exception in those cases.
 * To add a default case use the `conditional.defaultCase` helper as the final
 * case of your implementation. By default it returns `undefined`, but could be
 * provided a transformer in order to return something else.
 *
 * Due to TypeScript's inability to infer the result of negating a type-
 * predicate we can't refine the types used in subsequent cases based on
 * previous conditions. Using a `switch (true)` statement or ternary operators
 * is recommended for more precise type control when such type narrowing is
 * needed.
 *
 * @param data - The input data to be evaluated against the provided cases.
 * @param cases - A list of (up to 10) tuples, each defining a case. Each tuple
 * consists of a predicate (or a type-predicate) and a transformer function that
 * processes the data if its case matches.
 * @returns The output of the matched transformer. If no cases match, an
 * exception is thrown. The return type is a union of the return types of all
 * provided transformers.
 * @signature
 *   R.conditional(data, ...cases);
 * @example
 *   const nameOrId = 3 as string | number;
 *   R.conditional(
 *     nameOrId,
 *     [R.isString, (name) => `Hello ${name}`],
 *     [R.isNumber, (id) => `Hello ID: ${id}`],
 *     R.conditional.defaultCase(
 *       (something) => `Hello something (${JSON.stringify(something)})`,
 *     ),
 *   ); //=> 'Hello ID: 3'
 * @dataFirst
 * @category Function
 */
declare function conditional<T, Fn0 extends (x: T) => boolean, Fn1 extends (x: T) => boolean, Fn2 extends (x: T) => boolean, Fn3 extends (x: T) => boolean, Fn4 extends (x: T) => boolean, Fn5 extends (x: T) => boolean, Fn6 extends (x: T) => boolean, Fn7 extends (x: T) => boolean, Fn8 extends (x: T) => boolean, Fn9 extends (x: T) => boolean, Return0, Return1 = never, Return2 = never, Return3 = never, Return4 = never, Return5 = never, Return6 = never, Return7 = never, Return8 = never, Return9 = never>(data: T, case0: Case<T, Return0, Fn0>, case1?: Case<T, Return1, Fn1>, case2?: Case<T, Return2, Fn2>, case3?: Case<T, Return3, Fn3>, case4?: Case<T, Return4, Fn4>, case5?: Case<T, Return5, Fn5>, case6?: Case<T, Return6, Fn6>, case7?: Case<T, Return7, Fn7>, case8?: Case<T, Return8, Fn8>, case9?: Case<T, Return9, Fn9>): Return0 | Return1 | Return2 | Return3 | Return4 | Return5 | Return6 | Return7 | Return8 | Return9;
/**
 * A simplified case that accepts all data. Put this as the last case to
 * prevent an exception from being thrown when none of the previous cases
 * match.
 * If this is not the last case it will short-circuit anything after it.
 *
 * @param then - You only need to provide the transformer, the predicate is
 * implicit. @default () => undefined, which is how Lodash and Ramda handle
 * the final fallback case.
 * @example
 *   const nameOrId = 3 as string | number;
 *   R.conditional(
 *     nameOrId,
 *     [R.isString, (name) => `Hello ${name}`],
 *     [R.isNumber, (id) => `Hello ID: ${id}`],
 *     R.conditional.defaultCase(
 *       (something) => `Hello something (${JSON.stringify(something)})`,
 *     ),
 *   ); //=> 'Hello ID: 3'
 */
declare function defaultCase(): Case<unknown, undefined>;
declare function defaultCase<In, Then extends (param: In) => unknown>(then: Then): Case<In, ReturnType<Then>>;

export { conditionalPlus as conditional };