import type { Option } from "../Option";
import type { NonEmptyArray } from "./model";
/**
 * Append an element to the front of an array, creating a new non empty array
 *
 * @category Constructors
 * @since 1.0.0
 */
export declare const cons_: <A>(head: A, tail: ReadonlyArray<A>) => NonEmptyArray<A>;
/**
 * Append an element to the front of an array, creating a new non empty array
 *
 * @category Constructors
 * @since 1.0.0
 */
export declare const cons: <A>(tail: ReadonlyArray<A>) => (head: A) => NonEmptyArray<A>;
/**
 * Append an element to the end of an array, creating a new non empty array
 *
 * @category Constructors
 * @since 1.0.0
 */
export declare const snoc_: <A>(init: ReadonlyArray<A>, end: A) => NonEmptyArray<A>;
/**
 * Append an element to the end of an array, creating a new non empty array
 *
 * @category Constructors
 * @since 1.0.0
 */
export declare const snoc: <A>(end: A) => (init: ReadonlyArray<A>) => NonEmptyArray<A>;
/**
 * Builds a `NonEmptyArray` from an array returning `none` if `as` is an empty array
 *
 * @category Constructors
 * @since 1.0.0
 */
export declare const fromArray: <A>(as: readonly A[]) => Option<NonEmptyArray<A>>;
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