/**
 * A `Lens` is an optic used to zoom inside a product.
 *
 * `Lens`es have two type parameters generally called `S` and `A`: `Lens<S, A>` where `S` represents the product and `A`
 * an element inside of `S`.
 *
 * Laws:
 *
 * 1. get(set(a)(s)) = a
 * 2. set(get(s))(s) = s
 * 3. set(a)(set(a)(s)) = set(a)(s)
 */
import type { Either } from "@effect-ts/core/Either";
import type { Predicate, Refinement } from "@effect-ts/core/Function";
import type { Option } from "@effect-ts/core/Option";
import type { URI } from "@effect-ts/core/Prelude";
import * as P from "@effect-ts/core/Prelude";
import type { HashMap } from "@effect-ts/system/Collections/Immutable/HashMap";
import * as _ from "../Internal/index.js";
import { Lens } from "../Internal/index.js";
import type { Optional } from "../Optional/index.js";
import type { Prism } from "../Prism/index.js";
import type { Traversal } from "../Traversal/index.js";
export { Lens };
export declare const id: <S>() => Lens<S, S>;
/**
 * View a `Lens` as a `Optional`
 */
export declare const asOptional: <S, A>(sa: Lens<S, A>) => Optional<S, A>;
/**
 * View a `Lens` as a `Traversal`
 */
export declare const asTraversal: <S, A>(sa: Lens<S, A>) => Traversal<S, A>;
/**
 * Compose a `Lens` with a `Lens`
 */
export declare const compose: <A, B>(ab: Lens<A, B>) => <S>(sa: Lens<S, A>) => Lens<S, B>;
/**
 * Compose a `Lens` with a `Prism`
 */
export declare const composePrism: <A, B>(ab: Prism<A, B>) => <S>(sa: Lens<S, A>) => Optional<S, B>;
/**
 * Compose a `Lens` with an `Optional`
 */
export declare const composeOptional: <A, B>(ab: _.Optional<A, B>) => <S>(sa: _.Lens<S, A>) => _.Optional<S, B>;
export declare const modify: <A>(f: (a: A) => A) => <S>(sa: _.Lens<S, A>) => (s: S) => S;
/**
 * Return a `Optional` from a `Lens` focused on a nullable value
 */
export declare const fromNullable: <S, A>(sa: _.Lens<S, A>) => _.Optional<S, NonNullable<A>>;
export declare function filter<A, B extends A>(refinement: Refinement<A, B>): <S>(sa: Lens<S, A>) => Optional<S, B>;
export declare function filter<A>(predicate: Predicate<A>): <S>(sa: Lens<S, A>) => Optional<S, A>;
/**
 * Return a `Lens` from a `Lens` and a prop
 */
export declare const prop: <A, P extends keyof A>(prop: P) => <S>(sa: Lens<S, A>) => Lens<S, A[P]>;
/**
 * Return a `Lens` from a `Lens` and a list of props
 */
export declare const props: <A, P extends keyof A>(...props: [P, P, ...Array<P>]) => <S>(sa: Lens<S, A>) => Lens<S, {
    [K in P]: A[K];
}>;
/**
 * Return a `Lens` from a `Lens` and a component
 */
export declare const component: <A extends ReadonlyArray<unknown>, P extends keyof A>(prop: P) => <S>(sa: Lens<S, A>) => Lens<S, A[P]>;
/**
 * Return a `Optional` from a `Lens` focused on a `ReadonlyArray`
 */
export declare const index: (i: number) => <S, A>(sa: _.Lens<S, readonly A[]>) => _.Optional<S, A>;
/**
 * Return a `Optional` from a `Lens` focused on a `ReadonlyRecord` and a key
 */
export declare const keyInRecord: (key: string) => <S, A>(sa: _.Lens<S, Readonly<Record<string, A>>>) => _.Optional<S, A>;
/**
 * Return a `Lens` from a `Lens` focused on a `ReadonlyRecord` and a required key
 */
export declare const atKeyInRecord: (key: string) => <S, A>(sa: _.Lens<S, Readonly<Record<string, A>>>) => _.Lens<S, Option<A>>;
/**
 * Return a `Optional` from a `Lens` focused on a `HashMap` and a key
 */
export declare const keyInHashMap: <K = never>(key: K) => <S, A>(sa: _.Lens<S, Readonly<HashMap<K, A>>>) => _.Optional<S, A>;
/**
 * Return a `Lens` from a `Lens` focused on a `HashMap` and a required key
 */
export declare const atKeyInHashMap: <K>(key: K) => <S, A>(sa: _.Lens<S, Readonly<HashMap<K, A>>>) => _.Lens<S, Option<A>>;
/**
 * Return a `Optional` from a `Lens` focused on the `Some` of a `Option` type
 */
export declare const some: <S, A>(soa: Lens<S, Option<A>>) => Optional<S, A>;
/**
 * Return a `Optional` from a `Lens` focused on the `Right` of a `Either` type
 */
export declare const right: <S, E, A>(sea: Lens<S, Either<E, A>>) => Optional<S, A>;
/**
 * Return a `Optional` from a `Lens` focused on the `Left` of a `Either` type
 */
export declare const left: <S, E, A>(sea: Lens<S, Either<E, A>>) => Optional<S, E>;
/**
 * Pipeable set
 */
export declare const set: <A>(a: A) => <S>(lens: _.Lens<S, A>) => (s: S) => S;
/**
 * Pipeable get
 */
export declare const get: <S, A>(lens: _.Lens<S, A>) => (s: S) => A;
/**
 * Return a `Traversal` from a `Lens` focused on a `ForEach`
 */
export declare function forEach<T extends P.URIS, C = P.Auto>(T: P.ForEach<T, C>): <TK, TQ, TW, TX, TI, TS, TR, TE, S, A>(sta: Lens<S, P.Kind<T, C, TK, TQ, TW, TX, TI, TS, TR, TE, A>>) => Traversal<S, A>;
export declare const find: <A>(predicate: Predicate<A>) => <S>(sa: Lens<S, ReadonlyArray<A>>) => Optional<S, A>;
export declare const imap: <A, B>(f: (a: A) => B, g: (b: B) => A) => <E>(sa: Lens<E, A>) => Lens<E, B>;
export declare const LensURI = "monocle/Lens";
export declare type LensURI = typeof LensURI;
declare module "@effect-ts/core/Prelude/HKT" {
    interface URItoKind<FC, TC, K, Q, W, X, I, S, R, E, A> {
        [LensURI]: Lens<I, A>;
    }
}
export declare const Category: P.Category<[URI<"monocle/Lens", {}>], P.Auto>;
export declare const Invariant: P.Invariant<[URI<"monocle/Lens", {}>], P.Auto>;
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