import type { CustomEqualCreatorOptions } from './src/internalTypes';

export * from './src/internalTypes';

/**
 * Whether the values passed are strictly equal or both NaN.
 */
export declare const sameValueZeroEqual: <A, B>(a: A, b: B) => boolean;

/**
 * Whether the items passed are deeply-equal in value.
 */
export declare const deepEqual: <A, B>(a: A, b: B) => boolean;
/**
 * Whether the items passed are deeply-equal in value based on strict comparison.
 */
export declare const strictDeepEqual: <A, B>(a: A, b: B) => boolean;
/**
 * Whether the items passed are deeply-equal in value, including circular references.
 */
export declare const circularDeepEqual: <A, B>(a: A, b: B) => boolean;
/**
 * Whether the items passed are deeply-equal in value, including circular references,
 * based on strict comparison.
 */
export declare const strictCircularDeepEqual: <A, B>(a: A, b: B) => boolean;
/**
 * Whether the items passed are shallowly-equal in value.
 */
export declare const shallowEqual: <A, B>(a: A, b: B) => boolean;
/**
 * Whether the items passed are shallowly-equal in value based on strict comparison
 */
export declare const strictShallowEqual: <A, B>(a: A, b: B) => boolean;
/**
 * Whether the items passed are shallowly-equal in value, including circular references.
 */
export declare const circularShallowEqual: <A, B>(a: A, b: B) => boolean;
/**
 * Whether the items passed are shallowly-equal in value, including circular references,
 * based on strict comparison.
 */
export declare const strictCircularShallowEqual: <A, B>(a: A, b: B) => boolean;
/**
 * Create a custom equality comparison method.
 *
 * This can be done to create very targeted comparisons in extreme hot-path scenarios
 * where the standard methods are not performant enough, but can also be used to provide
 * support for legacy environments that cannot polyfill for modern features expected by
 * `fast-equals`, such as `WeakMap` or `RegExp.prototype.flags`.
 */
export declare function createCustomEqual<Meta = undefined>(
  options?: CustomEqualCreatorOptions<Meta>,
): <A, B>(a: A, b: B) => boolean;