/**
 * This module provides utility functions and type class instances for working with the `bigint` type in TypeScript.
 * It includes functions for basic arithmetic operations, as well as type class instances for
 * `Equivalence`, `Order`, `Semigroup`, and `Monoid`.
 *
 * @since 1.0.0
 */
import * as equivalence from "@fp-ts/core/typeclass/Equivalence";
import * as monoid from "@fp-ts/core/typeclass/Monoid";
import * as order from "@fp-ts/core/typeclass/Order";
import * as semigroup from "@fp-ts/core/typeclass/Semigroup";
/**
 * Tests if a value is a `bigint`.
 *
 * @param input - The value to test.
 *
 * @example
 * import { isBigint } from "@fp-ts/core/Bigint"
 *
 * assert.deepStrictEqual(isBigint(1n), true)
 * assert.deepStrictEqual(isBigint(1), false)
 *
 * @category guards
 * @since 1.0.0
 */
export declare const isBigint: (u: unknown) => u is bigint;
/**
 * @category algebraic operations
 * @since 1.0.0
 */
export declare const sum: {
    (that: bigint): (self: bigint) => bigint;
    (self: bigint, that: bigint): bigint;
};
/**
 * @category algebraic operations
 * @since 1.0.0
 */
export declare const multiply: {
    (that: bigint): (self: bigint) => bigint;
    (self: bigint, that: bigint): bigint;
};
/**
 * @category algebraic operations
 * @since 1.0.0
 */
export declare const subtract: {
    (that: bigint): (self: bigint) => bigint;
    (self: bigint, that: bigint): bigint;
};
/**
 * @category algebraic operations
 * @since 1.0.0
 */
export declare const divide: {
    (that: bigint): (self: bigint) => bigint;
    (self: bigint, that: bigint): bigint;
};
/**
 * @since 1.0.0
 */
export declare const increment: (n: bigint) => bigint;
/**
 * @since 1.0.0
 */
export declare const decrement: (n: bigint) => bigint;
/**
 * @category instances
 * @since 1.0.0
 */
export declare const Equivalence: equivalence.Equivalence<bigint>;
/**
 * @category instances
 * @since 1.0.0
 */
export declare const Order: order.Order<bigint>;
/**
 * `bigint` semigroup under addition.
 *
 * @category instances
 * @since 1.0.0
 */
export declare const SemigroupSum: semigroup.Semigroup<bigint>;
/**
 * `bigint` semigroup under multiplication.
 *
 * @category instances
 * @since 1.0.0
 */
export declare const SemigroupMultiply: semigroup.Semigroup<bigint>;
/**
 * `bigint` monoid under addition.
 *
 * The `empty` value is `0n`.
 *
 * @category instances
 * @since 1.0.0
 */
export declare const MonoidSum: monoid.Monoid<bigint>;
/**
 * `bigint` monoid under multiplication.
 *
 * The `empty` value is `1n`.
 *
 * @category instances
 * @since 1.0.0
 */
export declare const MonoidMultiply: monoid.Monoid<bigint>;
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