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Текущая директория: /opt/BitGoJS/node_modules/fp-ts/es6
Просмотр файла: IO.js
/**
* ```ts
* interface IO<A> {
* (): A
* }
* ```
*
* `IO<A>` represents a non-deterministic synchronous computation that can cause side effects, yields a value of
* type `A` and **never fails**.
*
* If you want to represent a synchronous computation that may fail, please see `IOEither`.
* If you want to represent a synchronous computation that may yield nothing, please see `IOOption`.
*
* @since 2.0.0
*/
import { getApplicativeMonoid } from './Applicative';
import { apFirst as apFirst_, apS as apS_, apSecond as apSecond_, getApplySemigroup } from './Apply';
import * as chainable from './Chain';
import { constant, dual, identity } from './function';
import { as as as_, asUnit as asUnit_, bindTo as bindTo_, flap as flap_, let as let__ } from './Functor';
import * as _ from './internal';
var _map = function (ma, f) { return function () { return f(ma()); }; };
var _ap = function (mab, ma) { return function () { return mab()(ma()); }; };
var _chainRec = function (a, f) { return function () {
var e = f(a)();
while (e._tag === 'Left') {
e = f(e.left)();
}
return e.right;
}; };
/**
* `map` can be used to turn functions `(a: A) => B` into functions `(fa: F<A>) => F<B>` whose argument and return types
* use the type constructor `F` to represent some computational context.
*
* @category mapping
* @since 2.0.0
*/
export var map = function (f) { return function (fa) { return _map(fa, f); }; };
/**
* @since 2.0.0
*/
export var ap = function (fa) { return function (fab) { return _ap(fab, fa); }; };
/**
* @category constructors
* @since 2.0.0
*/
export var of = constant;
/**
* @category sequencing
* @since 2.14.0
*/
export var flatMap = /*#__PURE__*/ dual(2, function (ma, f) {
return function () {
return f(ma())();
};
});
/**
* @category sequencing
* @since 2.0.0
*/
export var flatten = /*#__PURE__*/ flatMap(identity);
/**
* @category type lambdas
* @since 2.0.0
*/
export var URI = 'IO';
/**
* @category instances
* @since 2.7.0
*/
export var Functor = {
URI: URI,
map: _map
};
/**
* Maps the value to the specified constant value.
*
* @category mapping
* @since 2.16.0
*/
export var as = dual(2, as_(Functor));
/**
* Maps the value to the void constant value.
*
* @category mapping
* @since 2.16.0
*/
export var asUnit = asUnit_(Functor);
/**
* @category mapping
* @since 2.10.0
*/
export var flap = /*#__PURE__*/ flap_(Functor);
/**
* @category instances
* @since 2.10.0
*/
export var Pointed = {
URI: URI,
of: of
};
/**
* @category instances
* @since 2.10.0
*/
export var Apply = {
URI: URI,
map: _map,
ap: _ap
};
/**
* Combine two effectful actions, keeping only the result of the first.
*
* @since 2.0.0
*/
export var apFirst = /*#__PURE__*/ apFirst_(Apply);
/**
* Combine two effectful actions, keeping only the result of the second.
*
* @since 2.0.0
*/
export var apSecond = /*#__PURE__*/ apSecond_(Apply);
/**
* @category instances
* @since 2.7.0
*/
export var Applicative = {
URI: URI,
map: _map,
ap: _ap,
of: of
};
/**
* @category instances
* @since 2.10.0
*/
export var Chain = {
URI: URI,
map: _map,
ap: _ap,
chain: flatMap
};
/**
* @category instances
* @since 2.7.0
*/
export var Monad = {
URI: URI,
map: _map,
ap: _ap,
of: of,
chain: flatMap
};
/**
* Composes computations in sequence, using the return value of one computation to determine the next computation and
* keeping only the result of the first.
*
* @category combinators
* @since 2.15.0
*/
export var tap = /*#__PURE__*/ dual(2, chainable.tap(Chain));
/**
* @category zone of death
* @since 2.7.0
* @deprecated
*/
export var fromIO = identity;
/**
* @category instances
* @since 2.7.0
*/
export var MonadIO = {
URI: URI,
map: _map,
ap: _ap,
of: of,
chain: flatMap,
fromIO: fromIO
};
/**
* @category instances
* @since 2.7.0
*/
export var ChainRec = {
URI: URI,
map: _map,
ap: _ap,
chain: flatMap,
chainRec: _chainRec
};
/**
* @category instances
* @since 2.10.0
*/
export var FromIO = {
URI: URI,
fromIO: identity
};
// -------------------------------------------------------------------------------------
// do notation
// -------------------------------------------------------------------------------------
/**
* @category do notation
* @since 2.9.0
*/
export var Do = /*#__PURE__*/ of(_.emptyRecord);
/**
* @category do notation
* @since 2.8.0
*/
export var bindTo = /*#__PURE__*/ bindTo_(Functor);
var let_ = /*#__PURE__*/ let__(Functor);
export {
/**
* @category do notation
* @since 2.13.0
*/
let_ as let };
/**
* @category do notation
* @since 2.8.0
*/
export var bind = /*#__PURE__*/ chainable.bind(Chain);
/**
* @category do notation
* @since 2.8.0
*/
export var apS = /*#__PURE__*/ apS_(Apply);
/**
* @since 2.11.0
*/
export var ApT = /*#__PURE__*/ of(_.emptyReadonlyArray);
// -------------------------------------------------------------------------------------
// array utils
// -------------------------------------------------------------------------------------
/**
* Equivalent to `ReadonlyNonEmptyArray#traverseWithIndex(Applicative)`.
*
* @category traversing
* @since 2.11.0
*/
export var traverseReadonlyNonEmptyArrayWithIndex = function (f) {
return function (as) {
return function () {
var out = [f(0, _.head(as))()];
for (var i = 1; i < as.length; i++) {
out.push(f(i, as[i])());
}
return out;
};
};
};
/**
* Equivalent to `ReadonlyArray#traverseWithIndex(Applicative)`.
*
* @category traversing
* @since 2.11.0
*/
export var traverseReadonlyArrayWithIndex = function (f) {
var g = traverseReadonlyNonEmptyArrayWithIndex(f);
return function (as) { return (_.isNonEmpty(as) ? g(as) : ApT); };
};
/**
* Equivalent to `ReadonlyArray#traverseWithIndex(Applicative)`.
*
* @category traversing
* @since 2.9.0
*/
export var traverseArrayWithIndex = traverseReadonlyArrayWithIndex;
/**
* Equivalent to `ReadonlyArray#traverse(Applicative)`.
*
* @category traversing
* @since 2.9.0
*/
export var traverseArray = function (f) {
return traverseReadonlyArrayWithIndex(function (_, a) { return f(a); });
};
/**
* Equivalent to `ReadonlyArray#sequence(Applicative)`.
*
* @category traversing
* @since 2.9.0
*/
export var sequenceArray =
/*#__PURE__*/ traverseArray(identity);
// -------------------------------------------------------------------------------------
// legacy
// -------------------------------------------------------------------------------------
/**
* Alias of `flatMap`.
*
* @category legacy
* @since 2.0.0
*/
export var chain = flatMap;
/**
* Alias of `tap`.
*
* @category legacy
* @since 2.0.0
*/
export var chainFirst = tap;
// -------------------------------------------------------------------------------------
// deprecated
// -------------------------------------------------------------------------------------
/**
* This instance is deprecated, use small, specific instances instead.
* For example if a function needs a `Functor` instance, pass `IO.Functor` instead of `IO.io`
* (where `IO` is from `import IO from 'fp-ts/IO'`)
*
* @category zone of death
* @since 2.0.0
* @deprecated
*/
export var io = {
URI: URI,
map: _map,
of: of,
ap: _ap,
chain: flatMap,
fromIO: fromIO,
chainRec: _chainRec
};
/**
* Use [`getApplySemigroup`](./Apply.ts.html#getapplysemigroup) instead.
*
* @category zone of death
* @since 2.0.0
* @deprecated
*/
export var getSemigroup = /*#__PURE__*/ getApplySemigroup(Apply);
/**
* Use [`getApplicativeMonoid`](./Applicative.ts.html#getapplicativemonoid) instead.
*
* @category zone of death
* @since 2.0.0
* @deprecated
*/
export var getMonoid = /*#__PURE__*/ getApplicativeMonoid(Applicative);
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