279 lines
6.6 KiB
JavaScript
279 lines
6.6 KiB
JavaScript
import { getMonoid as getFM } from './function';
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import { getMonoid as getEM } from './Endomorphism';
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import * as _ from './internal';
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import * as Se from './Semigroup';
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// -------------------------------------------------------------------------------------
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// constructors
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// -------------------------------------------------------------------------------------
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/**
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* Get a monoid where `concat` will return the minimum, based on the provided bounded order.
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*
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* The `empty` value is the `top` value.
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*
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* @example
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* import * as N from 'fp-ts/number'
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* import * as M from 'fp-ts/Monoid'
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*
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* const M1 = M.min(N.Bounded)
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*
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* assert.deepStrictEqual(M1.concat(1, 2), 1)
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*
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* @category constructors
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* @since 2.10.0
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*/
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export var min = function (B) { return ({
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concat: Se.min(B).concat,
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empty: B.top
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}); };
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/**
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* Get a monoid where `concat` will return the maximum, based on the provided bounded order.
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*
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* The `empty` value is the `bottom` value.
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*
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* @example
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* import * as N from 'fp-ts/number'
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* import * as M from 'fp-ts/Monoid'
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*
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* const M1 = M.max(N.Bounded)
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*
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* assert.deepStrictEqual(M1.concat(1, 2), 2)
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*
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* @category constructors
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* @since 2.10.0
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*/
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export var max = function (B) { return ({
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concat: Se.max(B).concat,
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empty: B.bottom
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}); };
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// -------------------------------------------------------------------------------------
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// combinators
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// -------------------------------------------------------------------------------------
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/**
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* The dual of a `Monoid`, obtained by swapping the arguments of `concat`.
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*
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* @example
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* import { reverse } from 'fp-ts/Monoid'
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* import * as S from 'fp-ts/string'
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*
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* assert.deepStrictEqual(reverse(S.Monoid).concat('a', 'b'), 'ba')
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*
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* @since 2.10.0
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*/
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export var reverse = function (M) { return ({
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concat: Se.reverse(M).concat,
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empty: M.empty
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}); };
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/**
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* Given a struct of monoids returns a monoid for the struct.
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*
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* @example
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* import { struct } from 'fp-ts/Monoid'
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* import * as N from 'fp-ts/number'
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*
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* interface Point {
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* readonly x: number
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* readonly y: number
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* }
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*
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* const M = struct<Point>({
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* x: N.MonoidSum,
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* y: N.MonoidSum
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* })
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*
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* assert.deepStrictEqual(M.concat({ x: 1, y: 2 }, { x: 3, y: 4 }), { x: 4, y: 6 })
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*
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* @since 2.10.0
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*/
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export var struct = function (monoids) {
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var empty = {};
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for (var k in monoids) {
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if (_.has.call(monoids, k)) {
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empty[k] = monoids[k].empty;
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}
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}
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return {
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concat: Se.struct(monoids).concat,
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empty: empty
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};
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};
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/**
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* Given a tuple of monoids returns a monoid for the tuple.
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*
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* @example
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* import { tuple } from 'fp-ts/Monoid'
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* import * as B from 'fp-ts/boolean'
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* import * as N from 'fp-ts/number'
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* import * as S from 'fp-ts/string'
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*
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* const M1 = tuple(S.Monoid, N.MonoidSum)
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* assert.deepStrictEqual(M1.concat(['a', 1], ['b', 2]), ['ab', 3])
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*
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* const M2 = tuple(S.Monoid, N.MonoidSum, B.MonoidAll)
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* assert.deepStrictEqual(M2.concat(['a', 1, true], ['b', 2, false]), ['ab', 3, false])
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*
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* @since 2.10.0
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*/
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export var tuple = function () {
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var monoids = [];
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for (var _i = 0; _i < arguments.length; _i++) {
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monoids[_i] = arguments[_i];
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}
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return ({
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concat: Se.tuple.apply(Se, monoids).concat,
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empty: monoids.map(function (m) { return m.empty; })
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});
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};
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// -------------------------------------------------------------------------------------
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// utils
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// -------------------------------------------------------------------------------------
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/**
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* Given a sequence of `as`, concat them and return the total.
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*
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* If `as` is empty, return the monoid `empty` value.
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*
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* @example
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* import { concatAll } from 'fp-ts/Monoid'
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* import * as N from 'fp-ts/number'
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*
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* assert.deepStrictEqual(concatAll(N.MonoidSum)([1, 2, 3]), 6)
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* assert.deepStrictEqual(concatAll(N.MonoidSum)([]), 0)
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*
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* @since 2.10.0
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*/
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export var concatAll = function (M) { return Se.concatAll(M)(M.empty); };
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// -------------------------------------------------------------------------------------
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// deprecated
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// -------------------------------------------------------------------------------------
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/**
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* Use [`Monoid`](./void.ts.html#monoid) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var monoidVoid = {
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concat: Se.semigroupVoid.concat,
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empty: undefined
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};
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/**
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* Use [`tuple`](#tuple) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var getTupleMonoid = tuple;
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/**
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* Use [`struct`](#struct) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var getStructMonoid = struct;
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/**
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* Use [`reverse`](#reverse) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var getDualMonoid = reverse;
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/**
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* Use [`max`](#max) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var getJoinMonoid = max;
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/**
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* Use [`min`](#min) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var getMeetMonoid = min;
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/**
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* Use [`concatAll`](#concatall) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var fold = concatAll;
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/**
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* Use [`MonoidAll`](./boolean.ts.html#monoidall) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var monoidAll = {
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concat: Se.semigroupAll.concat,
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empty: true
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};
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/**
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* Use [`MonoidAny`](./boolean.ts.html#monoidany) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var monoidAny = {
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concat: Se.semigroupAny.concat,
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empty: false
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};
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/**
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* Use [`getMonoid`](./function.ts.html#getmonoid) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var getFunctionMonoid = getFM;
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/**
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* Use [`getEndomorphismMonoid`](./function.ts.html#getendomorphismmonoid) instead.
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*
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* **Note**. The execution order in [`getEndomorphismMonoid`](./function.ts.html#getendomorphismmonoid) is reversed.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var getEndomorphismMonoid = function () { return reverse(getEM()); };
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/**
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* Use [`Monoid`](./string.ts.html#monoid) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var monoidString = {
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concat: Se.semigroupString.concat,
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empty: ''
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};
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/**
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* Use [`MonoidSum`](./number.ts.html#monoidsum) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var monoidSum = {
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concat: Se.semigroupSum.concat,
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empty: 0
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};
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/**
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* Use [`MonoidProduct`](./number.ts.html#monoidproduct) instead.
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*
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* @category zone of death
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* @since 2.0.0
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* @deprecated
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*/
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export var monoidProduct = {
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concat: Se.semigroupProduct.concat,
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empty: 1
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};
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