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/** * This module provides utility functions and type class instances for working with the `boolean` type in TypeScript. * It includes functions for basic boolean operations, as well as type class instances for * `Equivalence` and `Order`. * * @since 2.0.0 */ import * as equivalence from "./Equivalence.js"; import { dual } from "./Function.js"; import * as order from "./Order.js"; import * as predicate from "./Predicate.js"; /** * Tests if a value is a `boolean`. * * @example * ```ts * import * as assert from "node:assert" * import { isBoolean } from "effect/Boolean" * * assert.deepStrictEqual(isBoolean(true), true) * assert.deepStrictEqual(isBoolean("true"), false) * ``` * * @category guards * @since 2.0.0 */ export const isBoolean = predicate.isBoolean; /** * This function returns the result of either of the given functions depending on the value of the boolean parameter. * It is useful when you have to run one of two functions depending on the boolean value. * * @example * ```ts * import * as assert from "node:assert" * import { Boolean } from "effect" * * assert.deepStrictEqual(Boolean.match(true, { onFalse: () => "It's false!", onTrue: () => "It's true!" }), "It's true!") * ``` * * @category pattern matching * @since 2.0.0 */ export const match = /*#__PURE__*/dual(2, (value, options) => value ? options.onTrue() : options.onFalse()); /** * @category instances * @since 2.0.0 */ export const Equivalence = equivalence.boolean; /** * @category instances * @since 2.0.0 */ export const Order = order.boolean; /** * Negates the given boolean: `!self` * * @example * ```ts * import * as assert from "node:assert" * import { not } from "effect/Boolean" * * assert.deepStrictEqual(not(true), false) * assert.deepStrictEqual(not(false), true) * ``` * * @category combinators * @since 2.0.0 */ export const not = self => !self; /** * Combines two boolean using AND: `self && that`. * * @example * ```ts * import * as assert from "node:assert" * import { and } from "effect/Boolean" * * assert.deepStrictEqual(and(true, true), true) * assert.deepStrictEqual(and(true, false), false) * assert.deepStrictEqual(and(false, true), false) * assert.deepStrictEqual(and(false, false), false) * ``` * * @category combinators * @since 2.0.0 */ export const and = /*#__PURE__*/dual(2, (self, that) => self && that); /** * Combines two boolean using NAND: `!(self && that)`. * * @example * ```ts * import * as assert from "node:assert" * import { nand } from "effect/Boolean" * * assert.deepStrictEqual(nand(true, true), false) * assert.deepStrictEqual(nand(true, false), true) * assert.deepStrictEqual(nand(false, true), true) * assert.deepStrictEqual(nand(false, false), true) * ``` * * @category combinators * @since 2.0.0 */ export const nand = /*#__PURE__*/dual(2, (self, that) => !(self && that)); /** * Combines two boolean using OR: `self || that`. * * @example * ```ts * import * as assert from "node:assert" * import { or } from "effect/Boolean" * * assert.deepStrictEqual(or(true, true), true) * assert.deepStrictEqual(or(true, false), true) * assert.deepStrictEqual(or(false, true), true) * assert.deepStrictEqual(or(false, false), false) * ``` * * @category combinators * @since 2.0.0 */ export const or = /*#__PURE__*/dual(2, (self, that) => self || that); /** * Combines two booleans using NOR: `!(self || that)`. * * @example * ```ts * import * as assert from "node:assert" * import { nor } from "effect/Boolean" * * assert.deepStrictEqual(nor(true, true), false) * assert.deepStrictEqual(nor(true, false), false) * assert.deepStrictEqual(nor(false, true), false) * assert.deepStrictEqual(nor(false, false), true) * ``` * * @category combinators * @since 2.0.0 */ export const nor = /*#__PURE__*/dual(2, (self, that) => !(self || that)); /** * Combines two booleans using XOR: `(!self && that) || (self && !that)`. * * @example * ```ts * import * as assert from "node:assert" * import { xor } from "effect/Boolean" * * assert.deepStrictEqual(xor(true, true), false) * assert.deepStrictEqual(xor(true, false), true) * assert.deepStrictEqual(xor(false, true), true) * assert.deepStrictEqual(xor(false, false), false) * ``` * * @category combinators * @since 2.0.0 */ export const xor = /*#__PURE__*/dual(2, (self, that) => !self && that || self && !that); /** * Combines two booleans using EQV (aka XNOR): `!xor(self, that)`. * * @example * ```ts * import * as assert from "node:assert" * import { eqv } from "effect/Boolean" * * assert.deepStrictEqual(eqv(true, true), true) * assert.deepStrictEqual(eqv(true, false), false) * assert.deepStrictEqual(eqv(false, true), false) * assert.deepStrictEqual(eqv(false, false), true) * ``` * * @category combinators * @since 2.0.0 */ export const eqv = /*#__PURE__*/dual(2, (self, that) => !xor(self, that)); /** * Combines two booleans using an implication: `(!self || that)`. * * @example * ```ts * import * as assert from "node:assert" * import { implies } from "effect/Boolean" * * assert.deepStrictEqual(implies(true, true), true) * assert.deepStrictEqual(implies(true, false), false) * assert.deepStrictEqual(implies(false, true), true) * assert.deepStrictEqual(implies(false, false), true) * ``` * * @category combinators * @since 2.0.0 */ export const implies = /*#__PURE__*/dual(2, (self, that) => self ? that : true); /** * This utility function is used to check if all the elements in a collection of boolean values are `true`. * * @example * ```ts * import * as assert from "node:assert" * import { every } from "effect/Boolean" * * assert.deepStrictEqual(every([true, true, true]), true) * assert.deepStrictEqual(every([true, false, true]), false) * ``` * * @since 2.0.0 */ export const every = collection => { for (const b of collection) { if (!b) { return false; } } return true; }; /** * This utility function is used to check if at least one of the elements in a collection of boolean values is `true`. * * @example * ```ts * import * as assert from "node:assert" * import { some } from "effect/Boolean" * * assert.deepStrictEqual(some([true, false, true]), true) * assert.deepStrictEqual(some([false, false, false]), false) * ``` * * @since 2.0.0 */ export const some = collection => { for (const b of collection) { if (b) { return true; } } return false; }; //# sourceMappingURL=Boolean.js.map