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/**
* A lightweight alternative to the `Effect` data type, with a subset of the functionality.
*
* @since 3.4.0
* @experimental
*/
import * as Arr from "./Array.js"
import type { Channel } from "./Channel.js"
import * as Context from "./Context.js"
import type { Effect, EffectUnify, EffectUnifyIgnore } from "./Effect.js"
import * as Effectable from "./Effectable.js"
import * as Either from "./Either.js"
import * as Equal from "./Equal.js"
import type { LazyArg } from "./Function.js"
import { constTrue, constVoid, dual, identity } from "./Function.js"
import { globalValue } from "./GlobalValue.js"
import * as Hash from "./Hash.js"
import type { TypeLambda } from "./HKT.js"
import type { Inspectable } from "./Inspectable.js"
import { format, NodeInspectSymbol, toStringUnknown } from "./Inspectable.js"
import * as InternalContext from "./internal/context.js"
import * as doNotation from "./internal/doNotation.js"
import { StructuralPrototype } from "./internal/effectable.js"
import * as Option from "./Option.js"
import type { Pipeable } from "./Pipeable.js"
import { pipeArguments } from "./Pipeable.js"
import type { Predicate, Refinement } from "./Predicate.js"
import { hasProperty, isIterable, isTagged } from "./Predicate.js"
import type { Sink } from "./Sink.js"
import type { Stream } from "./Stream.js"
import type { Concurrency, Covariant, Equals, NoExcessProperties, NotFunction, Simplify } from "./Types.js"
import type * as Unify from "./Unify.js"
import { SingleShotGen, YieldWrap, yieldWrapGet } from "./Utils.js"
/**
* @since 3.4.0
* @experimental
* @category type ids
*/
export const TypeId: unique symbol = Symbol.for("effect/Micro")
/**
* @since 3.4.0
* @experimental
* @category type ids
*/
export type TypeId = typeof TypeId
/**
* @since 3.4.0
* @experimental
* @category MicroExit
*/
export const MicroExitTypeId: unique symbol = Symbol.for(
"effect/Micro/MicroExit"
)
/**
* @since 3.4.0
* @experimental
* @category MicroExit
*/
export type MicroExitTypeId = typeof TypeId
/**
* A lightweight alternative to the `Effect` data type, with a subset of the functionality.
*
* @since 3.4.0
* @experimental
* @category models
*/
export interface Micro<out A, out E = never, out R = never> extends Effect<A, E, R> {
readonly [TypeId]: Micro.Variance<A, E, R>
[Symbol.iterator](): MicroIterator<Micro<A, E, R>>
[Unify.typeSymbol]?: unknown
[Unify.unifySymbol]?: MicroUnify<this>
[Unify.ignoreSymbol]?: MicroUnifyIgnore
}
/**
* @category models
* @since 3.4.3
*/
export interface MicroUnify<A extends { [Unify.typeSymbol]?: any }> extends EffectUnify<A> {
Micro?: () => A[Unify.typeSymbol] extends Micro<infer A0, infer E0, infer R0> | infer _ ? Micro<A0, E0, R0> : never
}
/**
* @category models
* @since 3.4.3
*/
export interface MicroUnifyIgnore extends EffectUnifyIgnore {
Effect?: true
}
/**
* @category type lambdas
* @since 3.4.1
*/
export interface MicroTypeLambda extends TypeLambda {
readonly type: Micro<this["Target"], this["Out1"], this["Out2"]>
}
/**
* @since 3.4.0
* @experimental
*/
export declare namespace Micro {
/**
* @since 3.4.0
* @experimental
*/
export interface Variance<A, E, R> {
_A: Covariant<A>
_E: Covariant<E>
_R: Covariant<R>
}
/**
* @since 3.4.0
* @experimental
*/
export type Success<T> = T extends Micro<infer _A, infer _E, infer _R> ? _A : never
/**
* @since 3.4.0
* @experimental
*/
export type Error<T> = T extends Micro<infer _A, infer _E, infer _R> ? _E : never
/**
* @since 3.4.0
* @experimental
*/
export type Context<T> = T extends Micro<infer _A, infer _E, infer _R> ? _R : never
}
/**
* @since 3.4.0
* @experimental
* @category guards
*/
export const isMicro = (u: unknown): u is Micro<any, any, any> => typeof u === "object" && u !== null && TypeId in u
/**
* @since 3.4.0
* @experimental
* @category models
*/
export interface MicroIterator<T extends Micro<any, any, any>> {
next(...args: ReadonlyArray<any>): IteratorResult<YieldWrap<T>, Micro.Success<T>>
}
// ----------------------------------------------------------------------------
// MicroCause
// ----------------------------------------------------------------------------
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export const MicroCauseTypeId = Symbol.for("effect/Micro/MicroCause")
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export type MicroCauseTypeId = typeof MicroCauseTypeId
/**
* A `MicroCause` is a data type that represents the different ways a `Micro` can fail.
*
* **Details**
*
* `MicroCause` comes in three forms:
*
* - `Die`: Indicates an unforeseen defect that wasn't planned for in the system's logic.
* - `Fail`: Covers anticipated errors that are recognized and typically handled within the application.
* - `Interrupt`: Signifies an operation that has been purposefully stopped.
*
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export type MicroCause<E> =
| MicroCause.Die
| MicroCause.Fail<E>
| MicroCause.Interrupt
/**
* @since 3.6.6
* @experimental
* @category guards
*/
export const isMicroCause = (self: unknown): self is MicroCause<unknown> => hasProperty(self, MicroCauseTypeId)
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export declare namespace MicroCause {
/**
* @since 3.4.6
* @experimental
*/
export type Error<T> = T extends MicroCause.Fail<infer E> ? E : never
/**
* @since 3.4.0
* @experimental
*/
export interface Proto<Tag extends string, E> extends Pipeable, globalThis.Error {
readonly [MicroCauseTypeId]: {
_E: Covariant<E>
}
readonly _tag: Tag
readonly traces: ReadonlyArray<string>
}
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export interface Die extends Proto<"Die", never> {
readonly defect: unknown
}
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export interface Fail<E> extends Proto<"Fail", E> {
readonly error: E
}
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export interface Interrupt extends Proto<"Interrupt", never> {}
}
const microCauseVariance = {
_E: identity
}
abstract class MicroCauseImpl<Tag extends string, E> extends globalThis.Error implements MicroCause.Proto<Tag, E> {
readonly [MicroCauseTypeId]: {
_E: Covariant<E>
}
constructor(
readonly _tag: Tag,
originalError: unknown,
readonly traces: ReadonlyArray<string>
) {
const causeName = `MicroCause.${_tag}`
let name: string
let message: string
let stack: string
if (originalError instanceof globalThis.Error) {
name = `(${causeName}) ${originalError.name}`
message = originalError.message as string
const messageLines = message.split("\n").length
stack = originalError.stack
? `(${causeName}) ${
originalError.stack
.split("\n")
.slice(0, messageLines + 3)
.join("\n")
}`
: `${name}: ${message}`
} else {
name = causeName
message = toStringUnknown(originalError, 0)
stack = `${name}: ${message}`
}
if (traces.length > 0) {
stack += `\n ${traces.join("\n ")}`
}
super(message)
this[MicroCauseTypeId] = microCauseVariance
this.name = name
this.stack = stack
}
pipe() {
return pipeArguments(this, arguments)
}
toString() {
return this.stack
}
[NodeInspectSymbol]() {
return this.stack
}
}
class Fail<E> extends MicroCauseImpl<"Fail", E> implements MicroCause.Fail<E> {
constructor(
readonly error: E,
traces: ReadonlyArray<string> = []
) {
super("Fail", error, traces)
}
}
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export const causeFail = <E>(
error: E,
traces: ReadonlyArray<string> = []
): MicroCause<E> => new Fail(error, traces)
class Die extends MicroCauseImpl<"Die", never> implements MicroCause.Die {
constructor(
readonly defect: unknown,
traces: ReadonlyArray<string> = []
) {
super("Die", defect, traces)
}
}
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export const causeDie = (
defect: unknown,
traces: ReadonlyArray<string> = []
): MicroCause<never> => new Die(defect, traces)
class Interrupt extends MicroCauseImpl<"Interrupt", never> implements MicroCause.Interrupt {
constructor(traces: ReadonlyArray<string> = []) {
super("Interrupt", "interrupted", traces)
}
}
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export const causeInterrupt = (
traces: ReadonlyArray<string> = []
): MicroCause<never> => new Interrupt(traces)
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export const causeIsFail = <E>(
self: MicroCause<E>
): self is MicroCause.Fail<E> => self._tag === "Fail"
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export const causeIsDie = <E>(self: MicroCause<E>): self is MicroCause.Die => self._tag === "Die"
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export const causeIsInterrupt = <E>(
self: MicroCause<E>
): self is MicroCause.Interrupt => self._tag === "Interrupt"
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export const causeSquash = <E>(self: MicroCause<E>): unknown =>
self._tag === "Fail" ? self.error : self._tag === "Die" ? self.defect : self
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
export const causeWithTrace: {
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
(trace: string): <E>(self: MicroCause<E>) => MicroCause<E>
/**
* @since 3.4.6
* @experimental
* @category MicroCause
*/
<E>(self: MicroCause<E>, trace: string): MicroCause<E>
} = dual(2, <E>(self: MicroCause<E>, trace: string): MicroCause<E> => {
const traces = [...self.traces, trace]
switch (self._tag) {
case "Die":
return causeDie(self.defect, traces)
case "Interrupt":
return causeInterrupt(traces)
case "Fail":
return causeFail(self.error, traces)
}
})
// ----------------------------------------------------------------------------
// MicroFiber
// ----------------------------------------------------------------------------
/**
* @since 3.11.0
* @experimental
* @category MicroFiber
*/
export const MicroFiberTypeId = Symbol.for("effect/Micro/MicroFiber")
/**
* @since 3.11.0
* @experimental
* @category MicroFiber
*/
export type MicroFiberTypeId = typeof MicroFiberTypeId
/**
* @since 3.11.0
* @experimental
* @category MicroFiber
*/
export interface MicroFiber<out A, out E = never> {
readonly [MicroFiberTypeId]: MicroFiber.Variance<A, E>
readonly currentOpCount: number
readonly getRef: <I, A>(ref: Context.Reference<I, A>) => A
readonly context: Context.Context<never>
readonly addObserver: (cb: (exit: MicroExit<A, E>) => void) => () => void
readonly unsafeInterrupt: () => void
readonly unsafePoll: () => MicroExit<A, E> | undefined
}
/**
* @since 3.11.0
* @experimental
* @category MicroFiber
*/
export declare namespace MicroFiber {
/**
* @since 3.11.0
* @experimental
* @category MicroFiber
*/
export interface Variance<out A, out E = never> {
readonly _A: Covariant<A>
readonly _E: Covariant<E>
}
}
const fiberVariance = {
_A: identity,
_E: identity
}
class MicroFiberImpl<in out A = any, in out E = any> implements MicroFiber<A, E> {
readonly [MicroFiberTypeId]: MicroFiber.Variance<A, E>
readonly _stack: Array<Primitive> = []
readonly _observers: Array<(exit: MicroExit<A, E>) => void> = []
_exit: MicroExit<A, E> | undefined
public _children: Set<MicroFiberImpl<any, any>> | undefined
public currentOpCount = 0
constructor(
public context: Context.Context<never>,
public interruptible = true
) {
this[MicroFiberTypeId] = fiberVariance
}
getRef<I, A>(ref: Context.Reference<I, A>): A {
return InternalContext.unsafeGetReference(this.context, ref)
}
addObserver(cb: (exit: MicroExit<A, E>) => void): () => void {
if (this._exit) {
cb(this._exit)
return constVoid
}
this._observers.push(cb)
return () => {
const index = this._observers.indexOf(cb)
if (index >= 0) {
this._observers.splice(index, 1)
}
}
}
_interrupted = false
unsafeInterrupt(): void {
if (this._exit) {
return
}
this._interrupted = true
if (this.interruptible) {
this.evaluate(exitInterrupt as any)
}
}
unsafePoll(): MicroExit<A, E> | undefined {
return this._exit
}
evaluate(effect: Primitive): void {
if (this._exit) {
return
} else if (this._yielded !== undefined) {
const yielded = this._yielded as () => void
this._yielded = undefined
yielded()
}
const exit = this.runLoop(effect)
if (exit === Yield) {
return
}
// the interruptChildren middlware is added in Micro.fork, so it can be
// tree-shaken if not used
const interruptChildren = fiberMiddleware.interruptChildren && fiberMiddleware.interruptChildren(this)
if (interruptChildren !== undefined) {
return this.evaluate(flatMap(interruptChildren, () => exit) as any)
}
this._exit = exit
for (let i = 0; i < this._observers.length; i++) {
this._observers[i](exit)
}
this._observers.length = 0
}
runLoop(effect: Primitive): MicroExit<A, E> | Yield {
let yielding = false
let current: Primitive | Yield = effect
this.currentOpCount = 0
try {
while (true) {
this.currentOpCount++
if (!yielding && this.getRef(CurrentScheduler).shouldYield(this as any)) {
yielding = true
const prev = current
current = flatMap(yieldNow, () => prev as any) as any
}
current = (current as any)[evaluate](this)
if (current === Yield) {
const yielded = this._yielded!
if (MicroExitTypeId in yielded) {
this._yielded = undefined
return yielded
}
return Yield
}
}
} catch (error) {
if (!hasProperty(current, evaluate)) {
return exitDie(`MicroFiber.runLoop: Not a valid effect: ${String(current)}`)
}
return exitDie(error)
}
}
getCont<S extends successCont | failureCont>(
symbol: S
): Primitive & Record<S, (value: any, fiber: MicroFiberImpl) => Primitive> | undefined {
while (true) {
const op = this._stack.pop()
if (!op) return undefined
const cont = op[ensureCont] && op[ensureCont](this)
if (cont) return { [symbol]: cont } as any
if (op[symbol]) return op as any
}
}
// cancel the yielded operation, or for the yielded exit value
_yielded: MicroExit<any, any> | (() => void) | undefined = undefined
yieldWith(value: MicroExit<any, any> | (() => void)): Yield {
this._yielded = value
return Yield
}
children(): Set<MicroFiber<any, any>> {
return this._children ??= new Set()
}
}
const fiberMiddleware = globalValue("effect/Micro/fiberMiddleware", () => ({
interruptChildren: undefined as ((fiber: MicroFiberImpl) => Micro<void> | undefined) | undefined
}))
const fiberInterruptChildren = (fiber: MicroFiberImpl) => {
if (fiber._children === undefined || fiber._children.size === 0) {
return undefined
}
return fiberInterruptAll(fiber._children)
}
/**
* @since 3.11.0
* @experimental
* @category MicroFiber
*/
export const fiberAwait = <A, E>(self: MicroFiber<A, E>): Micro<MicroExit<A, E>> =>
async((resume) => sync(self.addObserver((exit) => resume(succeed(exit)))))
/**
* @since 3.11.2
* @experimental
* @category MicroFiber
*/
export const fiberJoin = <A, E>(self: MicroFiber<A, E>): Micro<A, E> => flatten(fiberAwait(self))
/**
* @since 3.11.0
* @experimental
* @category MicroFiber
*/
export const fiberInterrupt = <A, E>(self: MicroFiber<A, E>): Micro<void> =>
suspend(() => {
self.unsafeInterrupt()
return asVoid(fiberAwait(self))
})
/**
* @since 3.11.0
* @experimental
* @category MicroFiber
*/
export const fiberInterruptAll = <A extends Iterable<MicroFiber<any, any>>>(fibers: A): Micro<void> =>
suspend(() => {
for (const fiber of fibers) fiber.unsafeInterrupt()
const iter = fibers[Symbol.iterator]()
const wait: Micro<void> = suspend(() => {
let result = iter.next()
while (!result.done) {
if (result.value.unsafePoll()) {
result = iter.next()
continue
}
const fiber = result.value
return async((resume) => {
fiber.addObserver((_) => {
resume(wait)
})
})
}
return exitVoid
})
return wait
})
const identifier = Symbol.for("effect/Micro/identifier")
type identifier = typeof identifier
const args = Symbol.for("effect/Micro/args")
type args = typeof args
const evaluate = Symbol.for("effect/Micro/evaluate")
type evaluate = typeof evaluate
const successCont = Symbol.for("effect/Micro/successCont")
type successCont = typeof successCont
const failureCont = Symbol.for("effect/Micro/failureCont")
type failureCont = typeof failureCont
const ensureCont = Symbol.for("effect/Micro/ensureCont")
type ensureCont = typeof ensureCont
const Yield = Symbol.for("effect/Micro/Yield")
type Yield = typeof Yield
interface Primitive {
readonly [identifier]: string
readonly [successCont]: ((value: unknown, fiber: MicroFiberImpl) => Primitive | Yield) | undefined
readonly [failureCont]:
| ((cause: MicroCause<unknown>, fiber: MicroFiberImpl) => Primitive | Yield)
| undefined
readonly [ensureCont]:
| ((fiber: MicroFiberImpl) =>
| ((value: unknown, fiber: MicroFiberImpl) => Primitive | Yield)
| undefined)
| undefined
[evaluate](fiber: MicroFiberImpl): Primitive | Yield
}
const microVariance = {
_A: identity,
_E: identity,
_R: identity
}
const MicroProto = {
...Effectable.EffectPrototype,
_op: "Micro",
[TypeId]: microVariance,
pipe() {
return pipeArguments(this, arguments)
},
[Symbol.iterator]() {
return new SingleShotGen(new YieldWrap(this)) as any
},
toJSON(this: Primitive) {
return {
_id: "Micro",
op: this[identifier],
...(args in this ? { args: this[args] } : undefined)
}
},
toString() {
return format(this)
},
[NodeInspectSymbol]() {
return format(this)
}
}
function defaultEvaluate(_fiber: MicroFiberImpl): Primitive | Yield {
return exitDie(`Micro.evaluate: Not implemented`) as any
}
const makePrimitiveProto = <Op extends string>(options: {
readonly op: Op
readonly eval?: (fiber: MicroFiberImpl) => Primitive | Micro<any, any, any> | Yield
readonly contA?: (this: Primitive, value: any, fiber: MicroFiberImpl) => Primitive | Micro<any, any, any> | Yield
readonly contE?: (
this: Primitive,
cause: MicroCause<any>,
fiber: MicroFiberImpl
) => Primitive | Micro<any, any, any> | Yield
readonly ensure?: (this: Primitive, fiber: MicroFiberImpl) => void | ((value: any, fiber: MicroFiberImpl) => void)
}): Primitive => ({
...MicroProto,
[identifier]: options.op,
[evaluate]: options.eval ?? defaultEvaluate,
[successCont]: options.contA,
[failureCont]: options.contE,
[ensureCont]: options.ensure
} as any)
const makePrimitive = <Fn extends (...args: Array<any>) => any, Single extends boolean = true>(options: {
readonly op: string
readonly single?: Single
readonly eval?: (
this: Primitive & { readonly [args]: Single extends true ? Parameters<Fn>[0] : Parameters<Fn> },
fiber: MicroFiberImpl
) => Primitive | Micro<any, any, any> | Yield
readonly contA?: (
this: Primitive & { readonly [args]: Single extends true ? Parameters<Fn>[0] : Parameters<Fn> },
value: any,
fiber: MicroFiberImpl
) => Primitive | Micro<any, any, any> | Yield
readonly contE?: (
this: Primitive & { readonly [args]: Single extends true ? Parameters<Fn>[0] : Parameters<Fn> },
cause: MicroCause<any>,
fiber: MicroFiberImpl
) => Primitive | Micro<any, any, any> | Yield
readonly ensure?: (
this: Primitive & { readonly [args]: Single extends true ? Parameters<Fn>[0] : Parameters<Fn> },
fiber: MicroFiberImpl
) => void | ((value: any, fiber: MicroFiberImpl) => void)
}): Fn => {
const Proto = makePrimitiveProto(options as any)
return function() {
const self = Object.create(Proto)
self[args] = options.single === false ? arguments : arguments[0]
return self
} as Fn
}
const makeExit = <Fn extends (...args: Array<any>) => any, Prop extends string>(options: {
readonly op: "Success" | "Failure"
readonly prop: Prop
readonly eval: (
this:
& MicroExit<unknown, unknown>
& { [args]: Parameters<Fn>[0] },
fiber: MicroFiberImpl<unknown, unknown>
) => Primitive | Yield
}): Fn => {
const Proto = {
...makePrimitiveProto(options),
[MicroExitTypeId]: MicroExitTypeId,
_tag: options.op,
get [options.prop](): any {
return (this as any)[args]
},
toJSON(this: any) {
return {
_id: "MicroExit",
_tag: options.op,
[options.prop]: this[args]
}
},
[Equal.symbol](this: any, that: any): boolean {
return isMicroExit(that) && that._tag === options.op &&
Equal.equals(this[args], (that as any)[args])
},
[Hash.symbol](this: any): number {
return Hash.cached(this, Hash.combine(Hash.string(options.op))(Hash.hash(this[args])))
}
}
return function(value: unknown) {
const self = Object.create(Proto)
self[args] = value
self[successCont] = undefined
self[failureCont] = undefined
self[ensureCont] = undefined
return self
} as Fn
}
/**
* Creates a `Micro` effect that will succeed with the specified constant value.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const succeed: <A>(value: A) => Micro<A> = makeExit({
op: "Success",
prop: "value",
eval(fiber) {
const cont = fiber.getCont(successCont)
return cont ? cont[successCont](this[args], fiber) : fiber.yieldWith(this)
}
})
/**
* Creates a `Micro` effect that will fail with the specified `MicroCause`.
*
* @since 3.4.6
* @experimental
* @category constructors
*/
export const failCause: <E>(cause: MicroCause<E>) => Micro<never, E> = makeExit({
op: "Failure",
prop: "cause",
eval(fiber) {
let cont = fiber.getCont(failureCont)
while (causeIsInterrupt(this[args]) && cont && fiber.interruptible) {
cont = fiber.getCont(failureCont)
}
return cont ? cont[failureCont](this[args], fiber) : fiber.yieldWith(this)
}
})
/**
* Creates a `Micro` effect that fails with the given error.
*
* This results in a `Fail` variant of the `MicroCause` type, where the error is
* tracked at the type level.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const fail = <E>(error: E): Micro<never, E> => failCause(causeFail(error))
/**
* Creates a `Micro` effect that succeeds with a lazily evaluated value.
*
* If the evaluation of the value throws an error, the effect will fail with a
* `Die` variant of the `MicroCause` type.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const sync: <A>(evaluate: LazyArg<A>) => Micro<A> = makePrimitive({
op: "Sync",
eval(fiber): Primitive | Yield {
const value = this[args]()
const cont = fiber.getCont(successCont)
return cont ? cont[successCont](value, fiber) : fiber.yieldWith(exitSucceed(value))
}
})
/**
* Lazily creates a `Micro` effect from the given side-effect.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const suspend: <A, E, R>(evaluate: LazyArg<Micro<A, E, R>>) => Micro<A, E, R> = makePrimitive({
op: "Suspend",
eval(_fiber) {
return this[args]()
}
})
/**
* Pause the execution of the current `Micro` effect, and resume it on the next
* scheduler tick.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const yieldNowWith: (priority?: number) => Micro<void> = makePrimitive({
op: "Yield",
eval(fiber) {
let resumed = false
fiber.getRef(CurrentScheduler).scheduleTask(() => {
if (resumed) return
fiber.evaluate(exitVoid as any)
}, this[args] ?? 0)
return fiber.yieldWith(() => {
resumed = true
})
}
})
/**
* Pause the execution of the current `Micro` effect, and resume it on the next
* scheduler tick.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const yieldNow: Micro<void> = yieldNowWith(0)
/**
* Creates a `Micro` effect that will succeed with the value wrapped in `Some`.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const succeedSome = <A>(a: A): Micro<Option.Option<A>> => succeed(Option.some(a))
/**
* Creates a `Micro` effect that succeeds with `None`.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const succeedNone: Micro<Option.Option<never>> = succeed(Option.none())
/**
* Creates a `Micro` effect that will fail with the lazily evaluated `MicroCause`.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const failCauseSync = <E>(evaluate: LazyArg<MicroCause<E>>): Micro<never, E> =>
suspend(() => failCause(evaluate()))
/**
* Creates a `Micro` effect that will die with the specified error.
*
* This results in a `Die` variant of the `MicroCause` type, where the error is
* not tracked at the type level.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const die = (defect: unknown): Micro<never> => exitDie(defect)
/**
* Creates a `Micro` effect that will fail with the lazily evaluated error.
*
* This results in a `Fail` variant of the `MicroCause` type, where the error is
* tracked at the type level.
*
* @since 3.4.6
* @experimental
* @category constructors
*/
export const failSync = <E>(error: LazyArg<E>): Micro<never, E> => suspend(() => fail(error()))
/**
* Converts an `Option` into a `Micro` effect, that will fail with
* `NoSuchElementException` if the option is `None`. Otherwise, it will succeed with the
* value of the option.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const fromOption = <A>(option: Option.Option<A>): Micro<A, NoSuchElementException> =>
option._tag === "Some" ? succeed(option.value) : fail(new NoSuchElementException({}))
/**
* Converts an `Either` into a `Micro` effect, that will fail with the left side
* of the either if it is a `Left`. Otherwise, it will succeed with the right
* side of the either.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const fromEither = <R, L>(either: Either.Either<R, L>): Micro<R, L> =>
either._tag === "Right" ? succeed(either.right) : fail(either.left)
const void_: Micro<void> = succeed(void 0)
export {
/**
* A `Micro` effect that will succeed with `void` (`undefined`).
*
* @since 3.4.0
* @experimental
* @category constructors
*/
void_ as void
}
const try_ = <A, E>(options: {
try: LazyArg<A>
catch: (error: unknown) => E
}): Micro<A, E> =>
suspend(() => {
try {
return succeed(options.try())
} catch (err) {
return fail(options.catch(err))
}
})
export {
/**
* The `Micro` equivalent of a try / catch block, which allows you to map
* thrown errors to a specific error type.
*
* @example
* ```ts
* import { Micro } from "effect"
*
* Micro.try({
* try: () => { throw new Error("boom") },
* catch: (cause) => new Error("caught", { cause })
* })
* ```
*
* @since 3.4.0
* @experimental
* @category constructors
*/
try_ as try
}
/**
* Wrap a `Promise` into a `Micro` effect.
*
* Any errors will result in a `Die` variant of the `MicroCause` type, where the
* error is not tracked at the type level.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const promise = <A>(evaluate: (signal: AbortSignal) => PromiseLike<A>): Micro<A> =>
asyncOptions<A>(function(resume, signal) {
evaluate(signal!).then(
(a) => resume(succeed(a)),
(e) => resume(die(e))
)
}, evaluate.length !== 0)
/**
* Wrap a `Promise` into a `Micro` effect. Any errors will be caught and
* converted into a specific error type.
*
* @example
* ```ts
* import { Micro } from "effect"
*
* Micro.tryPromise({
* try: () => Promise.resolve("success"),
* catch: (cause) => new Error("caught", { cause })
* })
* ```
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const tryPromise = <A, E>(options: {
readonly try: (signal: AbortSignal) => PromiseLike<A>
readonly catch: (error: unknown) => E
}): Micro<A, E> =>
asyncOptions<A, E>(function(resume, signal) {
try {
options.try(signal!).then(
(a) => resume(succeed(a)),
(e) => resume(fail(options.catch(e)))
)
} catch (err) {
resume(fail(options.catch(err)))
}
}, options.try.length !== 0)
/**
* Create a `Micro` effect using the current `MicroFiber`.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const withMicroFiber: <A, E = never, R = never>(
evaluate: (fiber: MicroFiberImpl<A, E>) => Micro<A, E, R>
) => Micro<A, E, R> = makePrimitive({
op: "WithMicroFiber",
eval(fiber) {
return this[args](fiber)
}
})
/**
* Flush any yielded effects that are waiting to be executed.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const yieldFlush: Micro<void> = withMicroFiber((fiber) => {
fiber.getRef(CurrentScheduler).flush()
return exitVoid
})
const asyncOptions: <A, E = never, R = never>(
register: (
resume: (effect: Micro<A, E, R>) => void,
signal?: AbortSignal
) => void | Micro<void, never, R>,
withSignal: boolean
) => Micro<A, E, R> = makePrimitive({
op: "Async",
single: false,
eval(fiber) {
const register = this[args][0]
let resumed = false
let yielded: boolean | Primitive = false
const controller = this[args][1] ? new AbortController() : undefined
const onCancel = register((effect) => {
if (resumed) return
resumed = true
if (yielded) {
fiber.evaluate(effect as any)
} else {
yielded = effect as any
}
}, controller?.signal)
if (yielded !== false) return yielded
yielded = true
fiber._yielded = () => {
resumed = true
}
if (controller === undefined && onCancel === undefined) {
return Yield
}
fiber._stack.push(asyncFinalizer(() => {
resumed = true
controller?.abort()
return onCancel ?? exitVoid
}))
return Yield
}
})
const asyncFinalizer: (onInterrupt: () => Micro<void, any, any>) => Primitive = makePrimitive({
op: "AsyncFinalizer",
ensure(fiber) {
if (fiber.interruptible) {
fiber.interruptible = false
fiber._stack.push(setInterruptible(true))
}
},
contE(cause, _fiber) {
return causeIsInterrupt(cause)
? flatMap(this[args](), () => failCause(cause))
: failCause(cause)
}
})
/**
* Create a `Micro` effect from an asynchronous computation.
*
* You can return a cleanup effect that will be run when the effect is aborted.
* It is also passed an `AbortSignal` that is triggered when the effect is
* aborted.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const async = <A, E = never, R = never>(
register: (
resume: (effect: Micro<A, E, R>) => void,
signal: AbortSignal
) => void | Micro<void, never, R>
): Micro<A, E, R> => asyncOptions(register as any, register.length >= 2)
/**
* A `Micro` that will never succeed or fail. It wraps `setInterval` to prevent
* the Javascript runtime from exiting.
*
* @since 3.4.0
* @experimental
* @category constructors
*/
export const never: Micro<never> = async<never>(function() {
const interval = setInterval(constVoid, 2147483646)
return sync(() => clearInterval(interval))
})
/**
* @since 3.4.0
* @experimental
* @category constructors
*/
export const gen = <Self, Eff extends YieldWrap<Micro<any, any, any>>, AEff>(
...args:
| [self: Self, body: (this: Self) => Generator<Eff, AEff, never>]
| [body: () => Generator<Eff, AEff, never>]
): Micro<
AEff,
[Eff] extends [never] ? never : [Eff] extends [YieldWrap<Micro<infer _A, infer E, infer _R>>] ? E : never,
[Eff] extends [never] ? never : [Eff] extends [YieldWrap<Micro<infer _A, infer _E, infer R>>] ? R : never
> => suspend(() => fromIterator(args.length === 1 ? args[0]() : args[1].call(args[0]) as any))
const fromIterator: (
iterator: Iterator<any, YieldWrap<Micro<any, any, any>>>
) => Micro<any, any, any> = makePrimitive({
op: "Iterator",
contA(value, fiber) {
const state = this[args].next(value)
if (state.done) return succeed(state.value)
fiber._stack.push(this)
return yieldWrapGet(state.value)
},
eval(this: any, fiber: MicroFiberImpl) {
return this[successCont](undefined, fiber)
}
})
// ----------------------------------------------------------------------------
// mapping & sequencing
// ----------------------------------------------------------------------------
/**
* Create a `Micro` effect that will replace the success value of the given
* effect.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
export const as: {
// ----------------------------------------------------------------------------
// mapping & sequencing
// ----------------------------------------------------------------------------
/**
* Create a `Micro` effect that will replace the success value of the given
* effect.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, B>(value: B): <E, R>(self: Micro<A, E, R>) => Micro<B, E, R>
// ----------------------------------------------------------------------------
// mapping & sequencing
// ----------------------------------------------------------------------------
/**
* Create a `Micro` effect that will replace the success value of the given
* effect.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, E, R, B>(self: Micro<A, E, R>, value: B): Micro<B, E, R>
} = dual(2, <A, E, R, B>(self: Micro<A, E, R>, value: B): Micro<B, E, R> => map(self, (_) => value))
/**
* Wrap the success value of this `Micro` effect in a `Some`.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
export const asSome = <A, E, R>(self: Micro<A, E, R>): Micro<Option.Option<A>, E, R> => map(self, Option.some)
/**
* Swap the error and success types of the `Micro` effect.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
export const flip = <A, E, R>(self: Micro<A, E, R>): Micro<E, A, R> =>
matchEffect(self, {
onFailure: succeed,
onSuccess: fail
})
/**
* A more flexible version of `flatMap` that combines `map` and `flatMap` into a
* single API.
*
* It also lets you directly pass a `Micro` effect, which will be executed after
* the current effect.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
export const andThen: {
/**
* A more flexible version of `flatMap` that combines `map` and `flatMap` into a
* single API.
*
* It also lets you directly pass a `Micro` effect, which will be executed after
* the current effect.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, X>(f: (a: A) => X): <E, R>(
self: Micro<A, E, R>
) => [X] extends [Micro<infer A1, infer E1, infer R1>] ? Micro<A1, E | E1, R | R1>
: Micro<X, E, R>
/**
* A more flexible version of `flatMap` that combines `map` and `flatMap` into a
* single API.
*
* It also lets you directly pass a `Micro` effect, which will be executed after
* the current effect.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<X>(f: NotFunction<X>): <A, E, R>(
self: Micro<A, E, R>
) => [X] extends [Micro<infer A1, infer E1, infer R1>] ? Micro<A1, E | E1, R | R1>
: Micro<X, E, R>
/**
* A more flexible version of `flatMap` that combines `map` and `flatMap` into a
* single API.
*
* It also lets you directly pass a `Micro` effect, which will be executed after
* the current effect.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, E, R, X>(self: Micro<A, E, R>, f: (a: A) => X): [X] extends [Micro<infer A1, infer E1, infer R1>] ? Micro<A1, E | E1, R | R1>
: Micro<X, E, R>
/**
* A more flexible version of `flatMap` that combines `map` and `flatMap` into a
* single API.
*
* It also lets you directly pass a `Micro` effect, which will be executed after
* the current effect.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, E, R, X>(self: Micro<A, E, R>, f: NotFunction<X>): [X] extends [Micro<infer A1, infer E1, infer R1>] ? Micro<A1, E | E1, R | R1>
: Micro<X, E, R>
} = dual(
2,
<A, E, R, B, E2, R2>(self: Micro<A, E, R>, f: any): Micro<B, E | E2, R | R2> =>
flatMap(self, (a) => {
const value = isMicro(f) ? f : typeof f === "function" ? f(a) : f
return isMicro(value) ? value : succeed(value)
})
)
/**
* Execute a side effect from the success value of the `Micro` effect.
*
* It is similar to the `andThen` api, but the success value is ignored.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
export const tap: {
/**
* Execute a side effect from the success value of the `Micro` effect.
*
* It is similar to the `andThen` api, but the success value is ignored.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, X>(f: (a: NoInfer<A>) => X): <E, R>(
self: Micro<A, E, R>
) => [X] extends [Micro<infer _A1, infer E1, infer R1>] ? Micro<A, E | E1, R | R1>
: Micro<A, E, R>
/**
* Execute a side effect from the success value of the `Micro` effect.
*
* It is similar to the `andThen` api, but the success value is ignored.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<X>(f: NotFunction<X>): <A, E, R>(
self: Micro<A, E, R>
) => [X] extends [Micro<infer _A1, infer E1, infer R1>] ? Micro<A, E | E1, R | R1>
: Micro<A, E, R>
/**
* Execute a side effect from the success value of the `Micro` effect.
*
* It is similar to the `andThen` api, but the success value is ignored.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, E, R, X>(self: Micro<A, E, R>, f: (a: NoInfer<A>) => X): [X] extends [Micro<infer _A1, infer E1, infer R1>] ? Micro<A, E | E1, R | R1>
: Micro<A, E, R>
/**
* Execute a side effect from the success value of the `Micro` effect.
*
* It is similar to the `andThen` api, but the success value is ignored.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, E, R, X>(self: Micro<A, E, R>, f: NotFunction<X>): [X] extends [Micro<infer _A1, infer E1, infer R1>] ? Micro<A, E | E1, R | R1>
: Micro<A, E, R>
} = dual(
2,
<A, E, R, B, E2, R2>(self: Micro<A, E, R>, f: (a: A) => Micro<B, E2, R2>): Micro<A, E | E2, R | R2> =>
flatMap(self, (a) => {
const value = isMicro(f) ? f : typeof f === "function" ? f(a) : f
return isMicro(value) ? as(value, a) : succeed(a)
})
)
/**
* Replace the success value of the `Micro` effect with `void`.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
export const asVoid = <A, E, R>(self: Micro<A, E, R>): Micro<void, E, R> => flatMap(self, (_) => exitVoid)
/**
* Access the `MicroExit` of the given `Micro` effect.
*
* @since 3.4.6
* @experimental
* @category mapping & sequencing
*/
export const exit = <A, E, R>(self: Micro<A, E, R>): Micro<MicroExit<A, E>, never, R> =>
matchCause(self, {
onFailure: exitFailCause,
onSuccess: exitSucceed
})
/**
* Replace the error type of the given `Micro` with the full `MicroCause` object.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
export const sandbox = <A, E, R>(self: Micro<A, E, R>): Micro<A, MicroCause<E>, R> => catchAllCause(self, fail)
/**
* Returns an effect that races all the specified effects,
* yielding the value of the first effect to succeed with a value. Losers of
* the race will be interrupted immediately
*
* @since 3.4.0
* @experimental
* @category sequencing
*/
export const raceAll = <Eff extends Micro<any, any, any>>(
all: Iterable<Eff>
): Micro<Micro.Success<Eff>, Micro.Error<Eff>, Micro.Context<Eff>> =>
withMicroFiber((parent) =>
async((resume) => {
const effects = Arr.fromIterable(all)
const len = effects.length
let doneCount = 0
let done = false
const fibers = new Set<MicroFiber<any, any>>()
const causes: Array<MicroCause<any>> = []
const onExit = (exit: MicroExit<any, any>) => {
doneCount++
if (exit._tag === "Failure") {
causes.push(exit.cause)
if (doneCount >= len) {
resume(failCause(causes[0]))
}
return
}
done = true
resume(fibers.size === 0 ? exit : flatMap(uninterruptible(fiberInterruptAll(fibers)), () => exit))
}
for (let i = 0; i < len; i++) {
if (done) break
const fiber = unsafeFork(parent, interruptible(effects[i]), true, true)
fibers.add(fiber)
fiber.addObserver((exit) => {
fibers.delete(fiber)
onExit(exit)
})
}
return fiberInterruptAll(fibers)
})
)
/**
* Returns an effect that races all the specified effects,
* yielding the value of the first effect to succeed or fail. Losers of
* the race will be interrupted immediately.
*
* @since 3.4.0
* @experimental
* @category sequencing
*/
export const raceAllFirst = <Eff extends Micro<any, any, any>>(
all: Iterable<Eff>
): Micro<Micro.Success<Eff>, Micro.Error<Eff>, Micro.Context<Eff>> =>
withMicroFiber((parent) =>
async((resume) => {
let done = false
const fibers = new Set<MicroFiber<any, any>>()
const onExit = (exit: MicroExit<any, any>) => {
done = true
resume(fibers.size === 0 ? exit : flatMap(fiberInterruptAll(fibers), () => exit))
}
for (const effect of all) {
if (done) break
const fiber = unsafeFork(parent, interruptible(effect), true, true)
fibers.add(fiber)
fiber.addObserver((exit) => {
fibers.delete(fiber)
onExit(exit)
})
}
return fiberInterruptAll(fibers)
})
)
/**
* Returns an effect that races two effects, yielding the value of the first
* effect to succeed. Losers of the race will be interrupted immediately.
*
* @since 3.4.0
* @experimental
* @category sequencing
*/
export const race: {
/**
* Returns an effect that races two effects, yielding the value of the first
* effect to succeed. Losers of the race will be interrupted immediately.
*
* @since 3.4.0
* @experimental
* @category sequencing
*/
<A2, E2, R2>(that: Micro<A2, E2, R2>): <A, E, R>(self: Micro<A, E, R>) => Micro<A | A2, E | E2, R | R2>
/**
* Returns an effect that races two effects, yielding the value of the first
* effect to succeed. Losers of the race will be interrupted immediately.
*
* @since 3.4.0
* @experimental
* @category sequencing
*/
<A, E, R, A2, E2, R2>(self: Micro<A, E, R>, that: Micro<A2, E2, R2>): Micro<A | A2, E | E2, R | R2>
} = dual(
2,
<A, E, R, A2, E2, R2>(self: Micro<A, E, R>, that: Micro<A2, E2, R2>): Micro<A | A2, E | E2, R | R2> =>
raceAll([self, that])
)
/**
* Returns an effect that races two effects, yielding the value of the first
* effect to succeed *or* fail. Losers of the race will be interrupted immediately.
*
* @since 3.4.0
* @experimental
* @category sequencing
*/
export const raceFirst: {
/**
* Returns an effect that races two effects, yielding the value of the first
* effect to succeed *or* fail. Losers of the race will be interrupted immediately.
*
* @since 3.4.0
* @experimental
* @category sequencing
*/
<A2, E2, R2>(that: Micro<A2, E2, R2>): <A, E, R>(self: Micro<A, E, R>) => Micro<A | A2, E | E2, R | R2>
/**
* Returns an effect that races two effects, yielding the value of the first
* effect to succeed *or* fail. Losers of the race will be interrupted immediately.
*
* @since 3.4.0
* @experimental
* @category sequencing
*/
<A, E, R, A2, E2, R2>(self: Micro<A, E, R>, that: Micro<A2, E2, R2>): Micro<A | A2, E | E2, R | R2>
} = dual(
2,
<A, E, R, A2, E2, R2>(self: Micro<A, E, R>, that: Micro<A2, E2, R2>): Micro<A | A2, E | E2, R | R2> =>
raceAllFirst([self, that])
)
/**
* Map the success value of this `Micro` effect to another `Micro` effect, then
* flatten the result.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
export const flatMap: {
/**
* Map the success value of this `Micro` effect to another `Micro` effect, then
* flatten the result.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, B, E2, R2>(f: (a: A) => Micro<B, E2, R2>): <E, R>(self: Micro<A, E, R>) => Micro<B, E | E2, R | R2>
/**
* Map the success value of this `Micro` effect to another `Micro` effect, then
* flatten the result.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, E, R, B, E2, R2>(self: Micro<A, E, R>, f: (a: A) => Micro<B, E2, R2>): Micro<B, E | E2, R | R2>
} = dual(
2,
<A, E, R, B, E2, R2>(
self: Micro<A, E, R>,
f: (a: A) => Micro<B, E2, R2>
): Micro<B, E | E2, R | R2> => {
const onSuccess = Object.create(OnSuccessProto)
onSuccess[args] = self
onSuccess[successCont] = f
return onSuccess
}
)
const OnSuccessProto = makePrimitiveProto({
op: "OnSuccess",
eval(this: any, fiber: MicroFiberImpl): Primitive {
fiber._stack.push(this)
return this[args]
}
})
// ----------------------------------------------------------------------------
// mapping & sequencing
// ----------------------------------------------------------------------------
/**
* Flattens any nested `Micro` effects, merging the error and requirement types.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
export const flatten = <A, E, R, E2, R2>(
self: Micro<Micro<A, E, R>, E2, R2>
): Micro<A, E | E2, R | R2> => flatMap(self, identity)
/**
* Transforms the success value of the `Micro` effect with the specified
* function.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
export const map: {
/**
* Transforms the success value of the `Micro` effect with the specified
* function.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, B>(f: (a: A) => B): <E, R>(self: Micro<A, E, R>) => Micro<B, E, R>
/**
* Transforms the success value of the `Micro` effect with the specified
* function.
*
* @since 3.4.0
* @experimental
* @category mapping & sequencing
*/
<A, E, R, B>(self: Micro<A, E, R>, f: (a: A) => B): Micro<B, E, R>
} = dual(
2,
<A, E, R, B>(self: Micro<A, E, R>, f: (a: A) => B): Micro<B, E, R> => flatMap(self, (a) => succeed(f(a)))
)
// ----------------------------------------------------------------------------
// MicroExit
// ----------------------------------------------------------------------------
/**
* The `MicroExit` type is used to represent the result of a `Micro` computation. It
* can either be successful, containing a value of type `A`, or it can fail,
* containing an error of type `E` wrapped in a `MicroCause`.
*
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export type MicroExit<A, E = never> =
| MicroExit.Success<A, E>
| MicroExit.Failure<A, E>
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export declare namespace MicroExit {
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export interface Proto<out A, out E = never> extends Micro<A, E> {
readonly [MicroExitTypeId]: MicroExitTypeId
}
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export interface Success<out A, out E> extends Proto<A, E> {
readonly _tag: "Success"
readonly value: A
}
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export interface Failure<out A, out E> extends Proto<A, E> {
readonly _tag: "Failure"
readonly cause: MicroCause<E>
}
}
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const isMicroExit = (u: unknown): u is MicroExit<unknown, unknown> => hasProperty(u, MicroExitTypeId)
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const exitSucceed: <A>(a: A) => MicroExit<A, never> = succeed as any
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const exitFailCause: <E>(cause: MicroCause<E>) => MicroExit<never, E> = failCause as any
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const exitInterrupt: MicroExit<never> = exitFailCause(causeInterrupt())
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const exitFail = <E>(e: E): MicroExit<never, E> => exitFailCause(causeFail(e))
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const exitDie = (defect: unknown): MicroExit<never> => exitFailCause(causeDie(defect))
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const exitIsSuccess = <A, E>(
self: MicroExit<A, E>
): self is MicroExit.Success<A, E> => self._tag === "Success"
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const exitIsFailure = <A, E>(
self: MicroExit<A, E>
): self is MicroExit.Failure<A, E> => self._tag === "Failure"
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const exitIsInterrupt = <A, E>(
self: MicroExit<A, E>
): self is MicroExit.Failure<A, E> & {
readonly cause: MicroCause.Interrupt
} => exitIsFailure(self) && self.cause._tag === "Interrupt"
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const exitIsFail = <A, E>(
self: MicroExit<A, E>
): self is MicroExit.Failure<A, E> & {
readonly cause: MicroCause.Fail<E>
} => exitIsFailure(self) && self.cause._tag === "Fail"
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const exitIsDie = <A, E>(
self: MicroExit<A, E>
): self is MicroExit.Failure<A, E> & {
readonly cause: MicroCause.Die
} => exitIsFailure(self) && self.cause._tag === "Die"
/**
* @since 3.4.6
* @experimental
* @category MicroExit
*/
export const exitVoid: MicroExit<void> = exitSucceed(void 0)
/**
* @since 3.11.0
* @experimental
* @category MicroExit
*/
export const exitVoidAll = <I extends Iterable<MicroExit<any, any>>>(
exits: I
): MicroExit<void, I extends Iterable<MicroExit<infer _A, infer _E>> ? _E : never> => {
for (const exit of exits) {
if (exit._tag === "Failure") {
return exit
}
}
return exitVoid
}
// ----------------------------------------------------------------------------
// scheduler
// ----------------------------------------------------------------------------
/**
* @since 3.5.9
* @experimental
* @category scheduler
*/
export interface MicroScheduler {
readonly scheduleTask: (task: () => void, priority: number) => void
readonly shouldYield: (fiber: MicroFiber<unknown, unknown>) => boolean
readonly flush: () => void
}
const setImmediate = "setImmediate" in globalThis
? globalThis.setImmediate
: (f: () => void) => setTimeout(f, 0)
/**
* @since 3.5.9
* @experimental
* @category scheduler
*/
export class MicroSchedulerDefault implements MicroScheduler {
private tasks: Array<() => void> = []
private running = false
/**
* @since 3.5.9
*/
scheduleTask(task: () => void, _priority: number) {
this.tasks.push(task)
if (!this.running) {
this.running = true
setImmediate(this.afterScheduled)
}
}
/**
* @since 3.5.9
*/
afterScheduled = () => {
this.running = false
this.runTasks()
}
/**
* @since 3.5.9
*/
runTasks() {
const tasks = this.tasks
this.tasks = []
for (let i = 0, len = tasks.length; i < len; i++) {
tasks[i]()
}
}
/**
* @since 3.5.9
*/
shouldYield(fiber: MicroFiber<unknown, unknown>) {
return fiber.currentOpCount >= fiber.getRef(MaxOpsBeforeYield)
}
/**
* @since 3.5.9
*/
flush() {
while (this.tasks.length > 0) {
this.runTasks()
}
}
}
/**
* Access the given `Context.Tag` from the environment.
*
* @since 3.4.0
* @experimental
* @category environment
*/
export const service: {
/**
* Access the given `Context.Tag` from the environment.
*
* @since 3.4.0
* @experimental
* @category environment
*/
<I, S>(tag: Context.Reference<I, S>): Micro<S>
/**
* Access the given `Context.Tag` from the environment.
*
* @since 3.4.0
* @experimental
* @category environment
*/
<I, S>(tag: Context.Tag<I, S>): Micro<S, never, I>
} =
(<I, S>(tag: Context.Tag<I, S>): Micro<S, never, I> =>
withMicroFiber((fiber) => succeed(Context.unsafeGet(fiber.context, tag)))) as any
/**
* Access the given `Context.Tag` from the environment, without tracking the
* dependency at the type level.
*
* It will return an `Option` of the service, depending on whether it is
* available in the environment or not.
*
* @since 3.4.0
* @experimental
* @category environment
*/
export const serviceOption = <I, S>(
tag: Context.Tag<I, S>
): Micro<Option.Option<S>> => withMicroFiber((fiber) => succeed(Context.getOption(fiber.context, tag)))
/**
* Update the Context with the given mapping function.
*
* @since 3.11.0
* @experimental
* @category environment
*/
export const updateContext: {
/**
* Update the Context with the given mapping function.
*
* @since 3.11.0
* @experimental
* @category environment
*/
<R2, R>(f: (context: Context.Context<R2>) => Context.Context<NoInfer<R>>): <A, E>(self: Micro<A, E, R>) => Micro<A, E, R2>
/**
* Update the Context with the given mapping function.
*
* @since 3.11.0
* @experimental
* @category environment
*/
<A, E, R, R2>(
self: Micro<A, E, R>,
f: (context: Context.Context<R2>) => Context.Context<NoInfer<R>>
): Micro<A, E, R2>
} = dual(
2,
<A, E, R, R2>(
self: Micro<A, E, R>,
f: (context: Context.Context<R2>) => Context.Context<NoInfer<R>>
): Micro<A, E, R2> =>
withMicroFiber</**
* Update the Context with the given mapping function.
*
* @since 3.11.0
* @experimental
* @category environment
*/
A, /**
* Update the Context with the given mapping function.
*
* @since 3.11.0
* @experimental
* @category environment
*/
E, /**
* Update the Context with the given mapping function.
*
* @since 3.11.0
* @experimental
* @category environment
*/
R2>((fiber) => {
const prev = fiber.context as Context.Context<R2>
fiber.context = f(prev)
return onExit(
self as any,
() => {
fiber.context = prev
return void_
}
)
})
)
/**
* Update the service for the given `Context.Tag` in the environment.
*
* @since 3.11.0
* @experimental
* @category environment
*/
export const updateService: {
/**
* Update the service for the given `Context.Tag` in the environment.
*
* @since 3.11.0
* @experimental
* @category environment
*/
<I, A>(tag: Context.Reference<I, A>, f: (value: A) => A): <XA, E, R>(self: Micro<XA, E, R>) => Micro<XA, E, R>
/**
* Update the service for the given `Context.Tag` in the environment.
*
* @since 3.11.0
* @experimental
* @category environment
*/
<I, A>(tag: Context.Tag<I, A>, f: (value: A) => A): <XA, E, R>(self: Micro<XA, E, R>) => Micro<XA, E, R | I>
/**
* Update the service for the given `Context.Tag` in the environment.
*
* @since 3.11.0
* @experimental
* @category environment
*/
<XA, E, R, I, A>(self: Micro<XA, E, R>, tag: Context.Reference<I, A>, f: (value: A) => A): Micro<XA, E, R>
/**
* Update the service for the given `Context.Tag` in the environment.
*
* @since 3.11.0
* @experimental
* @category environment
*/
<XA, E, R, I, A>(self: Micro<XA, E, R>, tag: Context.Tag<I, A>, f: (value: A) => A): Micro<XA, E, R | I>
} = dual(
3,
<XA, E, R, I, A>(
self: Micro<XA, E, R>,
tag: Context.Reference<I, A>,
f: (value: A) => A
): Micro<XA, E, R> =>
withMicroFiber((fiber) => {
const prev = Context.unsafeGet(fiber.context, tag)
fiber.context = Context.add(fiber.context, tag, f(prev))
return onExit(
self,
() => {
fiber.context = Context.add(fiber.context, tag, prev)
return void_
}
)
})
)
/**
* Access the current `Context` from the environment.
*
* @since 3.4.0
* @experimental
* @category environment
*/
export const context = <R>(): Micro<Context.Context<R>> => getContext as any
const getContext = withMicroFiber((fiber) => succeed(fiber.context))
/**
* Merge the given `Context` with the current context.
*
* @since 3.4.0
* @experimental
* @category environment
*/
export const provideContext: {
/**
* Merge the given `Context` with the current context.
*
* @since 3.4.0
* @experimental
* @category environment
*/
<XR>(context: Context.Context<XR>): <A, E, R>(self: Micro<A, E, R>) => Micro<A, E, Exclude<R, XR>>
/**
* Merge the given `Context` with the current context.
*
* @since 3.4.0
* @experimental
* @category environment
*/
<A, E, R, XR>(self: Micro<A, E, R>, context: Context.Context<XR>): Micro<A, E, Exclude<R, XR>>
} = dual(
2,
<A, E, R, XR>(
self: Micro<A, E, R>,
provided: Context.Context<XR>
): Micro<A, E, Exclude<R, XR>> => updateContext(self, Context.merge(provided)) as any
)
/**
* Add the provided service to the current context.
*
* @since 3.4.0
* @experimental
* @category environment
*/
export const provideService: {
/**
* Add the provided service to the current context.
*
* @since 3.4.0
* @experimental
* @category environment
*/
<I, S>(tag: Context.Tag<I, S>, service: S): <A, E, R>(self: Micro<A, E, R>) => Micro<A, E, Exclude<R, I>>
/**
* Add the provided service to the current context.
*
* @since 3.4.0
* @experimental
* @category environment
*/
<A, E, R, I, S>(self: Micro<A, E, R>, tag: Context.Tag<I, S>, service: S): Micro<A, E, Exclude<R, I>>
} = dual(
3,
<A, E, R, I, S>(
self: Micro<A, E, R>,
tag: Context.Tag<I, S>,
service: S
): Micro<A, E, Exclude<R, I>> => updateContext(self, Context.add(tag, service)) as any
)
/**
* Create a service using the provided `Micro` effect, and add it to the
* current context.
*
* @since 3.4.6
* @experimental
* @category environment
*/
export const provideServiceEffect: {
/**
* Create a service using the provided `Micro` effect, and add it to the
* current context.
*
* @since 3.4.6
* @experimental
* @category environment
*/
<I, S, E2, R2>(tag: Context.Tag<I, S>, acquire: Micro<S, E2, R2>): <A, E, R>(self: Micro<A, E, R>) => Micro<A, E | E2, Exclude<R, I> | R2>
/**
* Create a service using the provided `Micro` effect, and add it to the
* current context.
*
* @since 3.4.6
* @experimental
* @category environment
*/
<A, E, R, I, S, E2, R2>(self: Micro<A, E, R>, tag: Context.Tag<I, S>, acquire: Micro<S, E2, R2>): Micro<A, E | E2, Exclude<R, I> | R2>
} = dual(
3,
<A, E, R, I, S, E2, R2>(
self: Micro<A, E, R>,
tag: Context.Tag<I, S>,
acquire: Micro<S, E2, R2>
): Micro<A, E | E2, Exclude<R, I> | R2> => flatMap(acquire, (service) => provideService(self, tag, service))
)
// ========================================================================
// References
// ========================================================================
/**
* @since 3.11.0
* @experimental
* @category references
*/
export class MaxOpsBeforeYield extends Context.Reference<MaxOpsBeforeYield>()<
"effect/Micro/currentMaxOpsBeforeYield",
number
>(
"effect/Micro/currentMaxOpsBeforeYield",
{ defaultValue: () => 2048 }
) {}
/**
* @since 3.11.0
* @experimental
* @category environment refs
*/
export class CurrentConcurrency extends Context.Reference<CurrentConcurrency>()<
"effect/Micro/currentConcurrency",
"unbounded" | number
>(
"effect/Micro/currentConcurrency",
{ defaultValue: () => "unbounded" }
) {}
/**
* @since 3.11.0
* @experimental
* @category environment refs
*/
export class CurrentScheduler extends Context.Reference<CurrentScheduler>()<
"effect/Micro/currentScheduler",
MicroScheduler
>(
"effect/Micro/currentScheduler",
{ defaultValue: () => new MicroSchedulerDefault() }
) {}
/**
* If you have a `Micro` that uses `concurrency: "inherit"`, you can use this
* api to control the concurrency of that `Micro` when it is run.
*
* @example
* ```ts
* import * as Micro from "effect/Micro"
*
* Micro.forEach([1, 2, 3], (n) => Micro.succeed(n), {
* concurrency: "inherit"
* }).pipe(
* Micro.withConcurrency(2) // use a concurrency of 2
* )
* ```
*
* @since 3.4.0
* @experimental
* @category environment refs
*/
export const withConcurrency: {
/**
* If you have a `Micro` that uses `concurrency: "inherit"`, you can use this
* api to control the concurrency of that `Micro` when it is run.
*
* @example
* ```ts
* import * as Micro from "effect/Micro"
*
* Micro.forEach([1, 2, 3], (n) => Micro.succeed(n), {
* concurrency: "inherit"
* }).pipe(
* Micro.withConcurrency(2) // use a concurrency of 2
* )
* ```
*
* @since 3.4.0
* @experimental
* @category environment refs
*/
(concurrency: "unbounded" | number): <A, E, R>(self: Micro<A, E, R>) => Micro<A, E, R>
/**
* If you have a `Micro` that uses `concurrency: "inherit"`, you can use this
* api to control the concurrency of that `Micro` when it is run.
*
* @example
* ```ts
* import * as Micro from "effect/Micro"
*
* Micro.forEach([1, 2, 3], (n) => Micro.succeed(n), {
* concurrency: "inherit"
* }).pipe(
* Micro.withConcurrency(2) // use a concurrency of 2
* )
* ```
*
* @since 3.4.0
* @experimental
* @category environment refs
*/
<A, E, R>(self: Micro<A, E, R>, concurrency: "unbounded" | number): Micro<A, E, R>
} = dual(
2,
<A, E, R>(
self: Micro<A, E, R>,
concurrency: "unbounded" | number
): Micro<A, E, R> => provideService(self, CurrentConcurrency, concurrency)
)
// ----------------------------------------------------------------------------
// zipping
// ----------------------------------------------------------------------------
/**
* Combine two `Micro` effects into a single effect that produces a tuple of
* their results.
*
* @since 3.4.0
* @experimental
* @category zipping
*/
export const zip: {
// ----------------------------------------------------------------------------
// zipping
// ----------------------------------------------------------------------------
/**
* Combine two `Micro` effects into a single effect that produces a tuple of
* their results.
*
* @since 3.4.0
* @experimental
* @category zipping
*/
<A2, E2, R2>(
that: Micro<A2, E2, R2>,
options?:
| { readonly concurrent?: boolean | undefined }
| undefined
): <A, E, R>(self: Micro<A, E, R>) => Micro<[A, A2], E2 | E, R2 | R>
// ----------------------------------------------------------------------------
// zipping
// ----------------------------------------------------------------------------
/**
* Combine two `Micro` effects into a single effect that produces a tuple of
* their results.
*
* @since 3.4.0
* @experimental
* @category zipping
*/
<A, E, R, A2, E2, R2>(
self: Micro<A, E, R>,
that: Micro<A2, E2, R2>,
options?: { readonly concurrent?: boolean | undefined }
): Micro<[A, A2], E | E2, R | R2>
} = dual((args) => isMicro(args[1]), <A, E, R, A2, E2, R2>(
self: Micro<A, E, R>,
that: Micro<A2, E2, R2>,
options?: { readonly concurrent?: boolean | undefined }
): Micro<[A, A2], E | E2, R | R2> => zipWith(self, that, (a, a2) => [a, a2], options))
/**
* The `Micro.zipWith` function combines two `Micro` effects and allows you to
* apply a function to the results of the combined effects, transforming them
* into a single value.
*
* @since 3.4.3
* @experimental
* @category zipping
*/
export const zipWith: {
/**
* The `Micro.zipWith` function combines two `Micro` effects and allows you to
* apply a function to the results of the combined effects, transforming them
* into a single value.
*
* @since 3.4.3
* @experimental
* @category zipping
*/
<A2, E2, R2, A, B>(
that: Micro<A2, E2, R2>,
f: (a: A, b: A2) => B,
options?: { readonly concurrent?: boolean | undefined }
): <E, R>(self: Micro<A, E, R>) => Micro<B, E2 | E, R2 | R>
/**
* The `Micro.zipWith` function combines two `Micro` effects and allows you to
* apply a function to the results of the combined effects, transforming them
* into a single value.
*
* @since 3.4.3
* @experimental
* @category zipping
*/
<A, E, R, A2, E2, R2, B>(
self: Micro<A, E, R>,
that: Micro<A2, E2, R2>,
f: (a: A, b: A2) => B,
options?: { readonly concurrent?: boolean | undefined }
): Micro<B, E2 | E, R2 | R>
} = dual((args) => isMicro(args[1]), <A, E, R, A2, E2, R2, B>(
self: Micro<A, E, R>,
that: Micro<A2, E2, R2>,
f: (a: A, b: A2) => B,
options?: { readonly concurrent?: boolean | undefined }
): Micro<B, E2 | E, R2 | R> =>
options?.concurrent
// Use `all` exclusively for concurrent cases, as it introduces additional overhead due to the management of concurrency
? map(all([self, that], { concurrency: 2 }), ([a, a2]) => f(a, a2))
: flatMap(self, (a) => map(that, (a2) => f(a, a2))))
// ----------------------------------------------------------------------------
// filtering & conditionals
// ----------------------------------------------------------------------------
/**
* Filter the specified effect with the provided function, failing with specified
* `MicroCause` if the predicate fails.
*
* In addition to the filtering capabilities discussed earlier, you have the option to further
* refine and narrow down the type of the success channel by providing a
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
export const filterOrFailCause: {
// ----------------------------------------------------------------------------
// filtering & conditionals
// ----------------------------------------------------------------------------
/**
* Filter the specified effect with the provided function, failing with specified
* `MicroCause` if the predicate fails.
*
* In addition to the filtering capabilities discussed earlier, you have the option to further
* refine and narrow down the type of the success channel by providing a
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
<A, B extends A, E2>(
refinement: Refinement<A, B>,
orFailWith: (a: NoInfer<A>) => MicroCause<E2>
): <E, R>(self: Micro<A, E, R>) => Micro<B, E2 | E, R>
// ----------------------------------------------------------------------------
// filtering & conditionals
// ----------------------------------------------------------------------------
/**
* Filter the specified effect with the provided function, failing with specified
* `MicroCause` if the predicate fails.
*
* In addition to the filtering capabilities discussed earlier, you have the option to further
* refine and narrow down the type of the success channel by providing a
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
<A, E2>(
predicate: Predicate<NoInfer<A>>,
orFailWith: (a: NoInfer<A>) => MicroCause<E2>
): <E, R>(self: Micro<A, E, R>) => Micro<A, E2 | E, R>
// ----------------------------------------------------------------------------
// filtering & conditionals
// ----------------------------------------------------------------------------
/**
* Filter the specified effect with the provided function, failing with specified
* `MicroCause` if the predicate fails.
*
* In addition to the filtering capabilities discussed earlier, you have the option to further
* refine and narrow down the type of the success channel by providing a
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
<A, E, R, B extends A, E2>(
self: Micro<A, E, R>,
refinement: Refinement<A, B>,
orFailWith: (a: A) => MicroCause<E2>
): Micro<B, E | E2, R>
// ----------------------------------------------------------------------------
// filtering & conditionals
// ----------------------------------------------------------------------------
/**
* Filter the specified effect with the provided function, failing with specified
* `MicroCause` if the predicate fails.
*
* In addition to the filtering capabilities discussed earlier, you have the option to further
* refine and narrow down the type of the success channel by providing a
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
<A, E, R, E2>(
self: Micro<A, E, R>,
predicate: Predicate<A>,
orFailWith: (a: A) => MicroCause<E2>
): Micro<A, E | E2, R>
} = dual((args) => isMicro(args[0]), <A, E, R, B extends A, E2>(
self: Micro<A, E, R>,
refinement: Refinement<A, B>,
orFailWith: (a: A) => MicroCause<E2>
): Micro<B, E | E2, R> => flatMap(self, (a) => refinement(a) ? succeed(a) : failCause(orFailWith(a))))
/**
* Filter the specified effect with the provided function, failing with specified
* error if the predicate fails.
*
* In addition to the filtering capabilities discussed earlier, you have the option to further
* refine and narrow down the type of the success channel by providing a
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
export const filterOrFail: {
/**
* Filter the specified effect with the provided function, failing with specified
* error if the predicate fails.
*
* In addition to the filtering capabilities discussed earlier, you have the option to further
* refine and narrow down the type of the success channel by providing a
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
<A, B extends A, E2>(refinement: Refinement<A, B>, orFailWith: (a: NoInfer<A>) => E2): <E, R>(self: Micro<A, E, R>) => Micro<B, E2 | E, R>
/**
* Filter the specified effect with the provided function, failing with specified
* error if the predicate fails.
*
* In addition to the filtering capabilities discussed earlier, you have the option to further
* refine and narrow down the type of the success channel by providing a
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
<A, E2>(predicate: Predicate<NoInfer<A>>, orFailWith: (a: NoInfer<A>) => E2): <E, R>(self: Micro<A, E, R>) => Micro<A, E2 | E, R>
/**
* Filter the specified effect with the provided function, failing with specified
* error if the predicate fails.
*
* In addition to the filtering capabilities discussed earlier, you have the option to further
* refine and narrow down the type of the success channel by providing a
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
<A, E, R, B extends A, E2>(
self: Micro<A, E, R>,
refinement: Refinement<A, B>,
orFailWith: (a: A) => E2
): Micro<B, E | E2, R>
/**
* Filter the specified effect with the provided function, failing with specified
* error if the predicate fails.
*
* In addition to the filtering capabilities discussed earlier, you have the option to further
* refine and narrow down the type of the success channel by providing a
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
<A, E, R, E2>(self: Micro<A, E, R>, predicate: Predicate<A>, orFailWith: (a: A) => E2): Micro<A, E | E2, R>
} = dual((args) => isMicro(args[0]), <A, E, R, B extends A, E2>(
self: Micro<A, E, R>,
refinement: Refinement<A, B>,
orFailWith: (a: A) => E2
): Micro<B, E | E2, R> => flatMap(self, (a) => refinement(a) ? succeed(a) : fail(orFailWith(a))))
/**
* The moral equivalent of `if (p) exp`.
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
export const when: {
/**
* The moral equivalent of `if (p) exp`.
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
<E2 = never, R2 = never>(condition: LazyArg<boolean> | Micro<boolean, E2, R2>): <A, E, R>(self: Micro<A, E, R>) => Micro<Option.Option<A>, E | E2, R | R2>
/**
* The moral equivalent of `if (p) exp`.
*
* @since 3.4.0
* @experimental
* @category filtering & conditionals
*/
<A, E, R, E2 = never, R2 = never>(self: Micro<A, E, R>, condition: LazyArg<boolean> | Micro<boolean, E2, R2>): Micro<Option.Option<A>, E | E2, R | R2>
} = dual(
2,
<A, E, R, E2 = never, R2 = never>(
self: Micro<A, E, R>,
condition: LazyArg<boolean> | Micro<boolean, E2, R2>
): Micro<Option.Option<A>, E | E2, R | R2> =>
flatMap(isMicro(condition) ? condition : sync(condition), (pass) => pass ? asSome(self) : succeedNone)
)
// ----------------------------------------------------------------------------
// repetition
// ----------------------------------------------------------------------------
/**
* Repeat the given `Micro` using the provided options.
*
* The `while` predicate will be checked after each iteration, and can use the
* fall `MicroExit` of the effect to determine if the repetition should continue.
*
* @since 3.4.6
* @experimental
* @category repetition
*/
export const repeatExit: {
// ----------------------------------------------------------------------------
// repetition
// ----------------------------------------------------------------------------
/**
* Repeat the given `Micro` using the provided options.
*
* The `while` predicate will be checked after each iteration, and can use the
* fall `MicroExit` of the effect to determine if the repetition should continue.
*
* @since 3.4.6
* @experimental
* @category repetition
*/
<A, E>(
options: {
while: Predicate<MicroExit<A, E>>
times?: number | undefined
schedule?: MicroSchedule | undefined
}
): <R>(self: Micro<A, E, R>) => Micro<A, E, R>
// ----------------------------------------------------------------------------
// repetition
// ----------------------------------------------------------------------------
/**
* Repeat the given `Micro` using the provided options.
*
* The `while` predicate will be checked after each iteration, and can use the
* fall `MicroExit` of the effect to determine if the repetition should continue.
*
* @since 3.4.6
* @experimental
* @category repetition
*/
<A, E, R>(
self: Micro<A, E, R>,
options: {
while: Predicate<MicroExit<A, E>>
times?: number | undefined
schedule?: MicroSchedule | undefined
}
): Micro<A, E, R>
} = dual(2, <A, E, R>(self: Micro<A, E, R>, options: {
while: Predicate<MicroExit<A, E>>
times?: number | undefined
schedule?: MicroSchedule | undefined
}): Micro<A, E, R> =>
suspend(() => {
const startedAt = options.schedule ? Date.now() : 0
let attempt = 0
const loop: Micro<A, E, R> = flatMap(exit(self), (exit) => {
if (options.while !== undefined && !options.while(exit)) {
return exit
} else if (options.times !== undefined && attempt >= options.times) {
return exit
}
attempt++
let delayEffect = yieldNow
if (options.schedule !== undefined) {
const elapsed = Date.now() - startedAt
const duration = options.schedule(attempt, elapsed)
if (Option.isNone(duration)) {
return exit
}
delayEffect = sleep(duration.value)
}
return flatMap(delayEffect, () => loop)
})
return loop
}))
/**
* Repeat the given `Micro` effect using the provided options. Only successful
* results will be repeated.
*
* @since 3.4.0
* @experimental
* @category repetition
*/
export const repeat: {
/**
* Repeat the given `Micro` effect using the provided options. Only successful
* results will be repeated.
*
* @since 3.4.0
* @experimental
* @category repetition
*/
<A, E>(
options?: {
while?: Predicate<A> | undefined
times?: number | undefined
schedule?: MicroSchedule | undefined
} | undefined
): <R>(self: Micro<A, E, R>) => Micro<A, E, R>
/**
* Repeat the given `Micro` effect using the provided options. Only successful
* results will be repeated.
*
* @since 3.4.0
* @experimental
* @category repetition
*/
<A, E, R>(
self: Micro<A, E, R>,
options?: {
while?: Predicate<A> | undefined
times?: number | undefined
schedule?: MicroSchedule | undefined
} | undefined
): Micro<A, E, R>
} = dual((args) => isMicro(args[0]), <A, E, R>(
self: Micro<A, E, R>,
options?: {
while?: Predicate<A> | undefined
times?: number | undefined
schedule?: MicroSchedule | undefined
} | undefined
): Micro<A, E, R> =>
repeatExit(self, {
...options,
while: (exit) => exit._tag === "Success" && (options?.while === undefined || options.while(exit.value))
}))
/**
* Replicates the given effect `n` times.
*
* @since 3.11.0
* @experimental
* @category repetition
*/
export const replicate: {
/**
* Replicates the given effect `n` times.
*
* @since 3.11.0
* @experimental
* @category repetition
*/
(n: number): <A, E, R>(self: Micro<A, E, R>) => Array<Micro<A, E, R>>
/**
* Replicates the given effect `n` times.
*
* @since 3.11.0
* @experimental
* @category repetition
*/
<A, E, R>(self: Micro<A, E, R>, n: number): Array<Micro<A, E, R>>
} = dual(
2,
<A, E, R>(self: Micro<A, E, R>, n: number): Array<Micro<A, E, R>> => Array.from({ length: n }, () => self)
)
/**
* Performs this effect the specified number of times and collects the
* results.
*
* @since 3.11.0
* @category repetition
*/
export const replicateEffect: {
/**
* Performs this effect the specified number of times and collects the
* results.
*
* @since 3.11.0
* @category repetition
*/
(
n: number,
options?: {
readonly concurrency?: Concurrency | undefined
readonly discard?: false | undefined
}
): <A, E, R>(self: Micro<A, E, R>) => Micro<Array<A>, E, R>
/**
* Performs this effect the specified number of times and collects the
* results.
*
* @since 3.11.0
* @category repetition
*/
(
n: number,
options: {
readonly concurrency?: Concurrency | undefined
readonly discard: true
}
): <A, E, R>(self: Micro<A, E, R>) => Micro<void, E, R>
/**
* Performs this effect the specified number of times and collects the
* results.
*
* @since 3.11.0
* @category repetition
*/
<A, E, R>(
self: Micro<A, E, R>,
n: number,
options?: {
readonly concurrency?: Concurrency | undefined
readonly discard?: false | undefined
}
): Micro<Array<A>, E, R>
/**
* Performs this effect the specified number of times and collects the
* results.
*
* @since 3.11.0
* @category repetition
*/
<A, E, R>(
self: Micro<A, E, R>,
n: number,
options: {
readonly concurrency?: Concurrency | undefined
readonly discard: true
}
): Micro<void, E, R>
} = dual(
(args) => isMicro(args[0]),
<A, E, R>(
self: Micro<A, E, R>,
n: number,
options: {
readonly concurrency?: Concurrency | undefined
readonly discard: true
}
): Micro<void, E, R> => all(replicate(self, n), options)
)
/**
* Repeat the given `Micro` effect forever, only stopping if the effect fails.
*
* @since 3.4.0
* @experimental
* @category repetition
*/
export const forever = <A, E, R>(self: Micro<A, E, R>): Micro<never, E, R> => repeat(self) as any
// ----------------------------------------------------------------------------
// scheduling
// ----------------------------------------------------------------------------
/**
* The `MicroSchedule` type represents a function that can be used to calculate
* the delay between repeats.
*
* The function takes the current attempt number and the elapsed time since the
* first attempt, and returns the delay for the next attempt. If the function
* returns `None`, the repetition will stop.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
export type MicroSchedule = (attempt: number, elapsed: number) => Option.Option<number>
/**
* Create a `MicroSchedule` that will stop repeating after the specified number
* of attempts.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
export const scheduleRecurs = (n: number): MicroSchedule => (attempt) => attempt <= n ? Option.some(0) : Option.none()
/**
* Create a `MicroSchedule` that will generate a constant delay.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
export const scheduleSpaced = (millis: number): MicroSchedule => () => Option.some(millis)
/**
* Create a `MicroSchedule` that will generate a delay with an exponential backoff.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
export const scheduleExponential = (baseMillis: number, factor = 2): MicroSchedule => (attempt) =>
Option.some(Math.pow(factor, attempt) * baseMillis)
/**
* Returns a new `MicroSchedule` with an added calculated delay to each delay
* returned by this schedule.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
export const scheduleAddDelay: {
/**
* Returns a new `MicroSchedule` with an added calculated delay to each delay
* returned by this schedule.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
(f: () => number): (self: MicroSchedule) => MicroSchedule
/**
* Returns a new `MicroSchedule` with an added calculated delay to each delay
* returned by this schedule.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
(self: MicroSchedule, f: () => number): MicroSchedule
} = dual(
2,
(self: MicroSchedule, f: () => number): MicroSchedule => (attempt, elapsed) =>
Option.map(self(attempt, elapsed), (duration) => duration + f())
)
/**
* Transform a `MicroSchedule` to one that will have a delay that will never exceed
* the specified maximum.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
export const scheduleWithMaxDelay: {
/**
* Transform a `MicroSchedule` to one that will have a delay that will never exceed
* the specified maximum.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
(max: number): (self: MicroSchedule) => MicroSchedule
/**
* Transform a `MicroSchedule` to one that will have a delay that will never exceed
* the specified maximum.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
(self: MicroSchedule, max: number): MicroSchedule
} = dual(
2,
(self: MicroSchedule, max: number): MicroSchedule => (attempt, elapsed) =>
Option.map(self(attempt, elapsed), (duration) => Math.min(duration, max))
)
/**
* Transform a `MicroSchedule` to one that will stop repeating after the specified
* amount of time.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
export const scheduleWithMaxElapsed: {
/**
* Transform a `MicroSchedule` to one that will stop repeating after the specified
* amount of time.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
(max: number): (self: MicroSchedule) => MicroSchedule
/**
* Transform a `MicroSchedule` to one that will stop repeating after the specified
* amount of time.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
(self: MicroSchedule, max: number): MicroSchedule
} = dual(
2,
(self: MicroSchedule, max: number): MicroSchedule => (attempt, elapsed) =>
elapsed < max ? self(attempt, elapsed) : Option.none()
)
/**
* Combines two `MicroSchedule`s, by recurring if either schedule wants to
* recur, using the minimum of the two durations between recurrences.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
export const scheduleUnion: {
/**
* Combines two `MicroSchedule`s, by recurring if either schedule wants to
* recur, using the minimum of the two durations between recurrences.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
(that: MicroSchedule): (self: MicroSchedule) => MicroSchedule
/**
* Combines two `MicroSchedule`s, by recurring if either schedule wants to
* recur, using the minimum of the two durations between recurrences.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
(self: MicroSchedule, that: MicroSchedule): MicroSchedule
} = dual(
2,
(self: MicroSchedule, that: MicroSchedule): MicroSchedule => (attempt, elapsed) =>
Option.zipWith(self(attempt, elapsed), that(attempt, elapsed), (d1, d2) => Math.min(d1, d2))
)
/**
* Combines two `MicroSchedule`s, by recurring only if both schedules want to
* recur, using the maximum of the two durations between recurrences.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
export const scheduleIntersect: {
/**
* Combines two `MicroSchedule`s, by recurring only if both schedules want to
* recur, using the maximum of the two durations between recurrences.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
(that: MicroSchedule): (self: MicroSchedule) => MicroSchedule
/**
* Combines two `MicroSchedule`s, by recurring only if both schedules want to
* recur, using the maximum of the two durations between recurrences.
*
* @since 3.4.6
* @experimental
* @category scheduling
*/
(self: MicroSchedule, that: MicroSchedule): MicroSchedule
} = dual(
2,
(self: MicroSchedule, that: MicroSchedule): MicroSchedule => (attempt, elapsed) =>
Option.zipWith(self(attempt, elapsed), that(attempt, elapsed), (d1, d2) => Math.max(d1, d2))
)
// ----------------------------------------------------------------------------
// error handling
// ----------------------------------------------------------------------------
/**
* Catch the full `MicroCause` object of the given `Micro` effect, allowing you to
* recover from any kind of cause.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
export const catchAllCause: {
// ----------------------------------------------------------------------------
// error handling
// ----------------------------------------------------------------------------
/**
* Catch the full `MicroCause` object of the given `Micro` effect, allowing you to
* recover from any kind of cause.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<E, B, E2, R2>(f: (cause: NoInfer<MicroCause<E>>) => Micro<B, E2, R2>): <A, R>(self: Micro<A, E, R>) => Micro<A | B, E2, R | R2>
// ----------------------------------------------------------------------------
// error handling
// ----------------------------------------------------------------------------
/**
* Catch the full `MicroCause` object of the given `Micro` effect, allowing you to
* recover from any kind of cause.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<A, E, R, B, E2, R2>(
self: Micro<A, E, R>,
f: (cause: NoInfer<MicroCause<E>>) => Micro<B, E2, R2>
): Micro<A | B, E2, R | R2>
} = dual(
2,
<A, E, R, B, E2, R2>(
self: Micro<A, E, R>,
f: (cause: NoInfer<MicroCause<E>>) => Micro<B, E2, R2>
): Micro<A | B, E2, R | R2> => {
const onFailure = Object.create(OnFailureProto)
onFailure[args] = self
onFailure[failureCont] = f
return onFailure
}
)
const OnFailureProto = makePrimitiveProto({
op: "OnFailure",
eval(this: any, fiber: MicroFiberImpl): Primitive {
fiber._stack.push(this as any)
return this[args]
}
})
/**
* Selectively catch a `MicroCause` object of the given `Micro` effect,
* using the provided predicate to determine if the failure should be caught.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
export const catchCauseIf: {
/**
* Selectively catch a `MicroCause` object of the given `Micro` effect,
* using the provided predicate to determine if the failure should be caught.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<E, B, E2, R2, EB extends MicroCause<E>>(
refinement: Refinement<MicroCause<E>, EB>,
f: (cause: EB) => Micro<B, E2, R2>
): <A, R>(
self: Micro<A, E, R>
) => Micro<A | B, Exclude<E, MicroCause.Error<EB>> | E2, R | R2>
/**
* Selectively catch a `MicroCause` object of the given `Micro` effect,
* using the provided predicate to determine if the failure should be caught.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<E, B, E2, R2>(
predicate: Predicate<MicroCause<NoInfer<E>>>,
f: (cause: NoInfer<MicroCause<E>>) => Micro<B, E2, R2>
): <A, R>(self: Micro<A, E, R>) => Micro<A | B, E | E2, R | R2>
/**
* Selectively catch a `MicroCause` object of the given `Micro` effect,
* using the provided predicate to determine if the failure should be caught.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<A, E, R, B, E2, R2, EB extends MicroCause<E>>(
self: Micro<A, E, R>,
refinement: Refinement<MicroCause<E>, EB>,
f: (cause: EB) => Micro<B, E2, R2>
): Micro<A | B, Exclude<E, MicroCause.Error<EB>> | E2, R | R2>
/**
* Selectively catch a `MicroCause` object of the given `Micro` effect,
* using the provided predicate to determine if the failure should be caught.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<A, E, R, B, E2, R2>(
self: Micro<A, E, R>,
predicate: Predicate<MicroCause<NoInfer<E>>>,
f: (cause: NoInfer<MicroCause<E>>) => Micro<B, E2, R2>
): Micro<A | B, E | E2, R | R2>
} = dual(
3,
<A, E, R, B, E2, R2>(
self: Micro<A, E, R>,
predicate: Predicate<MicroCause<E>>,
f: (cause: MicroCause<E>) => Micro<B, E2, R2>
): Micro<A | B, E | E2, R | R2> =>
catchAllCause(self, (cause) => predicate(cause) ? f(cause) : failCause(cause) as any)
)
/**
* Catch the error of the given `Micro` effect, allowing you to recover from it.
*
* It only catches expected errors.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
export const catchAll: {
/**
* Catch the error of the given `Micro` effect, allowing you to recover from it.
*
* It only catches expected errors.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<E, B, E2, R2>(f: (e: NoInfer<E>) => Micro<B, E2, R2>): <A, R>(self: Micro<A, E, R>) => Micro<A | B, E2, R | R2>
/**
* Catch the error of the given `Micro` effect, allowing you to recover from it.
*
* It only catches expected errors.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<A, E, R, B, E2, R2>(self: Micro<A, E, R>, f: (e: NoInfer<E>) => Micro<B, E2, R2>): Micro<A | B, E2, R | R2>
} = dual(
2,
<A, E, R, B, E2, R2>(
self: Micro<A, E, R>,
f: (a: NoInfer<E>) => Micro<B, E2, R2>
): Micro<A | B, E2, R | R2> => catchCauseIf(self, causeIsFail, (cause) => f(cause.error))
)
/**
* Catch any unexpected errors of the given `Micro` effect, allowing you to recover from them.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
export const catchAllDefect: {
/**
* Catch any unexpected errors of the given `Micro` effect, allowing you to recover from them.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<E, B, E2, R2>(f: (defect: unknown) => Micro<B, E2, R2>): <A, R>(self: Micro<A, E, R>) => Micro<A | B, E | E2, R | R2>
/**
* Catch any unexpected errors of the given `Micro` effect, allowing you to recover from them.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<A, E, R, B, E2, R2>(self: Micro<A, E, R>, f: (defect: unknown) => Micro<B, E2, R2>): Micro<A | B, E | E2, R | R2>
} = dual(
2,
<A, E, R, B, E2, R2>(self: Micro<A, E, R>, f: (defect: unknown) => Micro<B, E2, R2>): Micro<A | B, E | E2, R | R2> =>
catchCauseIf(self, causeIsDie, (die) => f(die.defect))
)
/**
* Perform a side effect using the full `MicroCause` object of the given `Micro`.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
export const tapErrorCause: {
/**
* Perform a side effect using the full `MicroCause` object of the given `Micro`.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<E, B, E2, R2>(f: (cause: NoInfer<MicroCause<E>>) => Micro<B, E2, R2>): <A, R>(self: Micro<A, E, R>) => Micro<A, E | E2, R | R2>
/**
* Perform a side effect using the full `MicroCause` object of the given `Micro`.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<A, E, R, B, E2, R2>(
self: Micro<A, E, R>,
f: (cause: NoInfer<MicroCause<E>>) => Micro<B, E2, R2>
): Micro<A, E | E2, R | R2>
} = dual(
2,
<A, E, R, B, E2, R2>(
self: Micro<A, E, R>,
f: (cause: NoInfer<MicroCause<E>>) => Micro<B, E2, R2>
): Micro<A, E | E2, R | R2> => tapErrorCauseIf(self, constTrue, f)
)
/**
* Perform a side effect using if a `MicroCause` object matches the specified
* predicate.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const tapErrorCauseIf: {
/**
* Perform a side effect using if a `MicroCause` object matches the specified
* predicate.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<E, B, E2, R2, EB extends MicroCause<E>>(refinement: Refinement<MicroCause<E>, EB>, f: (a: EB) => Micro<B, E2, R2>): <A, R>(self: Micro<A, E, R>) => Micro<A, E | E2, R | R2>
/**
* Perform a side effect using if a `MicroCause` object matches the specified
* predicate.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<E, B, E2, R2>(
predicate: (cause: NoInfer<MicroCause<E>>) => boolean,
f: (a: NoInfer<MicroCause<E>>) => Micro<B, E2, R2>
): <A, R>(self: Micro<A, E, R>) => Micro<A, E | E2, R | R2>
/**
* Perform a side effect using if a `MicroCause` object matches the specified
* predicate.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<A, E, R, B, E2, R2, EB extends MicroCause<E>>(
self: Micro<A, E, R>,
refinement: Refinement<MicroCause<E>, EB>,
f: (a: EB) => Micro<B, E2, R2>
): Micro<A, E | E2, R | R2>
/**
* Perform a side effect using if a `MicroCause` object matches the specified
* predicate.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<A, E, R, B, E2, R2>(
self: Micro<A, E, R>,
predicate: (cause: NoInfer<MicroCause<E>>) => boolean,
f: (a: NoInfer<MicroCause<E>>) => Micro<B, E2, R2>
): Micro<A, E | E2, R | R2>
} = dual(
3,
<A, E, R, B, E2, R2, EB extends MicroCause<E>>(
self: Micro<A, E, R>,
refinement: Refinement<MicroCause<E>, EB>,
f: (a: EB) => Micro<B, E2, R2>
): Micro<A, E | E2, R | R2> => catchCauseIf(self, refinement, (cause) => andThen(f(cause), failCause(cause)))
)
/**
* Perform a side effect from expected errors of the given `Micro`.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
export const tapError: {
/**
* Perform a side effect from expected errors of the given `Micro`.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<E, B, E2, R2>(f: (e: NoInfer<E>) => Micro<B, E2, R2>): <A, R>(self: Micro<A, E, R>) => Micro<A, E | E2, R | R2>
/**
* Perform a side effect from expected errors of the given `Micro`.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<A, E, R, B, E2, R2>(self: Micro<A, E, R>, f: (e: NoInfer<E>) => Micro<B, E2, R2>): Micro<A, E | E2, R | R2>
} = dual(
2,
<A, E, R, B, E2, R2>(self: Micro<A, E, R>, f: (e: NoInfer<E>) => Micro<B, E2, R2>): Micro<A, E | E2, R | R2> =>
tapErrorCauseIf(self, causeIsFail, (fail) => f(fail.error))
)
/**
* Perform a side effect from unexpected errors of the given `Micro`.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
export const tapDefect: {
/**
* Perform a side effect from unexpected errors of the given `Micro`.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<E, B, E2, R2>(f: (defect: unknown) => Micro<B, E2, R2>): <A, R>(self: Micro<A, E, R>) => Micro<A, E | E2, R | R2>
/**
* Perform a side effect from unexpected errors of the given `Micro`.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<A, E, R, B, E2, R2>(self: Micro<A, E, R>, f: (defect: unknown) => Micro<B, E2, R2>): Micro<A, E | E2, R | R2>
} = dual(
2,
<A, E, R, B, E2, R2>(self: Micro<A, E, R>, f: (defect: unknown) => Micro<B, E2, R2>): Micro<A, E | E2, R | R2> =>
tapErrorCauseIf(self, causeIsDie, (die) => f(die.defect))
)
/**
* Catch any expected errors that match the specified predicate.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const catchIf: {
/**
* Catch any expected errors that match the specified predicate.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<E, EB extends E, A2, E2, R2>(refinement: Refinement<NoInfer<E>, EB>, f: (e: EB) => Micro<A2, E2, R2>): <A, R>(self: Micro<A, E, R>) => Micro<A2 | A, E2 | Exclude<E, EB>, R2 | R>
/**
* Catch any expected errors that match the specified predicate.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<E, A2, E2, R2>(predicate: Predicate<NoInfer<E>>, f: (e: NoInfer<E>) => Micro<A2, E2, R2>): <A, R>(self: Micro<A, E, R>) => Micro<A2 | A, E | E2, R2 | R>
/**
* Catch any expected errors that match the specified predicate.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<A, E, R, EB extends E, A2, E2, R2>(
self: Micro<A, E, R>,
refinement: Refinement<E, EB>,
f: (e: EB) => Micro<A2, E2, R2>
): Micro<A | A2, E2 | Exclude<E, EB>, R | R2>
/**
* Catch any expected errors that match the specified predicate.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<A, E, R, A2, E2, R2>(
self: Micro<A, E, R>,
predicate: Predicate<E>,
f: (e: E) => Micro<A2, E2, R2>
): Micro<A | A2, E | E2, R | R2>
} = dual(
3,
<A, E, R, A2, E2, R2>(
self: Micro<A, E, R>,
predicate: Predicate<E>,
f: (e: E) => Micro<A2, E2, R2>
): Micro<A | A2, E | E2, R | R2> =>
catchCauseIf(
self,
(f): f is MicroCause.Fail<E> => causeIsFail(f) && predicate(f.error),
(fail) => f(fail.error)
)
)
/**
* Recovers from the specified tagged error.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const catchTag: {
/**
* Recovers from the specified tagged error.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<K extends E extends { _tag: string } ? E["_tag"] : never, E, A1, E1, R1>(k: K, f: (e: Extract<E, { _tag: K }>) => Micro<A1, E1, R1>): <A, R>(self: Micro<A, E, R>) => Micro<A1 | A, E1 | Exclude<E, { _tag: K }>, R1 | R>
/**
* Recovers from the specified tagged error.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<A, E, R, K extends E extends { _tag: string } ? E["_tag"] : never, R1, E1, A1>(
self: Micro<A, E, R>,
k: K,
f: (e: Extract<E, { _tag: K }>) => Micro<A1, E1, R1>
): Micro<A | A1, E1 | Exclude<E, { _tag: K }>, R | R1>
} = dual(3, <A, E, R, K extends E extends { _tag: string } ? E["_tag"] : never, R1, E1, A1>(
self: Micro<A, E, R>,
k: K,
f: (e: Extract<E, { _tag: K }>) => Micro<A1, E1, R1>
): Micro<A | A1, E1 | Exclude<E, { _tag: K }>, R | R1> =>
catchIf(self, isTagged(k) as Refinement<E, Extract<E, { _tag: K }>>, f) as any)
/**
* Transform the full `MicroCause` object of the given `Micro` effect.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
export const mapErrorCause: {
/**
* Transform the full `MicroCause` object of the given `Micro` effect.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<E, E2>(f: (e: MicroCause<E>) => MicroCause<E2>): <A, R>(self: Micro<A, E, R>) => Micro<A, E2, R>
/**
* Transform the full `MicroCause` object of the given `Micro` effect.
*
* @since 3.4.6
* @experimental
* @category error handling
*/
<A, E, R, E2>(self: Micro<A, E, R>, f: (e: MicroCause<E>) => MicroCause<E2>): Micro<A, E2, R>
} = dual(
2,
<A, E, R, E2>(self: Micro<A, E, R>, f: (e: MicroCause<E>) => MicroCause<E2>): Micro<A, E2, R> =>
catchAllCause(self, (cause) => failCause(f(cause)))
)
/**
* Transform any expected errors of the given `Micro` effect.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const mapError: {
/**
* Transform any expected errors of the given `Micro` effect.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<E, E2>(f: (e: E) => E2): <A, R>(self: Micro<A, E, R>) => Micro<A, E2, R>
/**
* Transform any expected errors of the given `Micro` effect.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<A, E, R, E2>(self: Micro<A, E, R>, f: (e: E) => E2): Micro<A, E2, R>
} = dual(
2,
<A, E, R, E2>(self: Micro<A, E, R>, f: (e: E) => E2): Micro<A, E2, R> => catchAll(self, (error) => fail(f(error)))
)
/**
* Elevate any expected errors of the given `Micro` effect to unexpected errors,
* resulting in an error type of `never`.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const orDie = <A, E, R>(self: Micro<A, E, R>): Micro<A, never, R> => catchAll(self, die)
/**
* Recover from all errors by succeeding with the given value.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const orElseSucceed: {
/**
* Recover from all errors by succeeding with the given value.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<B>(f: LazyArg<B>): <A, E, R>(self: Micro<A, E, R>) => Micro<A | B, never, R>
/**
* Recover from all errors by succeeding with the given value.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<A, E, R, B>(self: Micro<A, E, R>, f: LazyArg<B>): Micro<A | B, never, R>
} = dual(
2,
<A, E, R, B>(self: Micro<A, E, R>, f: LazyArg<B>): Micro<A | B, never, R> => catchAll(self, (_) => sync(f))
)
/**
* Ignore any expected errors of the given `Micro` effect, returning `void`.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const ignore = <A, E, R>(self: Micro<A, E, R>): Micro<void, never, R> =>
matchEffect(self, { onFailure: (_) => void_, onSuccess: (_) => void_ })
/**
* Ignore any expected errors of the given `Micro` effect, returning `void`.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const ignoreLogged = <A, E, R>(self: Micro<A, E, R>): Micro<void, never, R> =>
matchEffect(self, {
// eslint-disable-next-line no-console
onFailure: (error) => sync(() => console.error(error)),
onSuccess: (_) => void_
})
/**
* Replace the success value of the given `Micro` effect with an `Option`,
* wrapping the success value in `Some` and returning `None` if the effect fails
* with an expected error.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const option = <A, E, R>(self: Micro<A, E, R>): Micro<Option.Option<A>, never, R> =>
match(self, { onFailure: Option.none, onSuccess: Option.some })
/**
* Replace the success value of the given `Micro` effect with an `Either`,
* wrapping the success value in `Right` and wrapping any expected errors with
* a `Left`.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const either = <A, E, R>(self: Micro<A, E, R>): Micro<Either.Either<A, E>, never, R> =>
match(self, { onFailure: Either.left, onSuccess: Either.right })
/**
* Retry the given `Micro` effect using the provided options.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const retry: {
/**
* Retry the given `Micro` effect using the provided options.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<A, E>(
options?: {
while?: Predicate<E> | undefined
times?: number | undefined
schedule?: MicroSchedule | undefined
} | undefined
): <R>(self: Micro<A, E, R>) => Micro<A, E, R>
/**
* Retry the given `Micro` effect using the provided options.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<A, E, R>(
self: Micro<A, E, R>,
options?: {
while?: Predicate<E> | undefined
times?: number | undefined
schedule?: MicroSchedule | undefined
} | undefined
): Micro<A, E, R>
} = dual((args) => isMicro(args[0]), <A, E, R>(
self: Micro<A, E, R>,
options?: {
while?: Predicate<E> | undefined
times?: number | undefined
schedule?: MicroSchedule | undefined
} | undefined
): Micro<A, E, R> =>
repeatExit(self, {
...options,
while: (exit) =>
exit._tag === "Failure" && exit.cause._tag === "Fail" &&
(options?.while === undefined || options.while(exit.cause.error))
}))
/**
* Add a stack trace to any failures that occur in the effect. The trace will be
* added to the `traces` field of the `MicroCause` object.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
export const withTrace: {
/**
* Add a stack trace to any failures that occur in the effect. The trace will be
* added to the `traces` field of the `MicroCause` object.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
(name: string): <A, E, R>(self: Micro<A, E, R>) => Micro<A, E, R>
/**
* Add a stack trace to any failures that occur in the effect. The trace will be
* added to the `traces` field of the `MicroCause` object.
*
* @since 3.4.0
* @experimental
* @category error handling
*/
<A, E, R>(self: Micro<A, E, R>, name: string): Micro<A, E, R>
} = function() {
const prevLimit = globalThis.Error.stackTraceLimit
globalThis.Error.stackTraceLimit = 2
const error = new globalThis.Error()
globalThis.Error.stackTraceLimit = prevLimit
function generate(name: string, cause: MicroCause<any>) {
const stack = error.stack
if (!stack) {
return cause
}
const line = stack.split("\n")[2]?.trim().replace(/^at /, "")
if (!line) {
return cause
}
const lineMatch = line.match(/\((.*)\)$/)
return causeWithTrace(cause, `at ${name} (${lineMatch ? lineMatch[1] : line})`)
}
const f = (name: string) => (self: Micro<any, any, any>) => onError(self, (cause) => failCause(generate(name, cause)))
if (arguments.length === 2) {
return f(arguments[1])(arguments[0])
}
return f(arguments[0])
} as any
// ----------------------------------------------------------------------------
// pattern matching
// ----------------------------------------------------------------------------
/**
* @since 3.4.6
* @experimental
* @category pattern matching
*/
export const matchCauseEffect: {
// ----------------------------------------------------------------------------
// pattern matching
// ----------------------------------------------------------------------------
/**
* @since 3.4.6
* @experimental
* @category pattern matching
*/
<E, A2, E2, R2, A, A3, E3, R3>(
options: {
readonly onFailure: (cause: MicroCause<E>) => Micro<A2, E2, R2>
readonly onSuccess: (a: A) => Micro<A3, E3, R3>
}
): <R>(self: Micro<A, E, R>) => Micro<A2 | A3, E2 | E3, R2 | R3 | R>
// ----------------------------------------------------------------------------
// pattern matching
// ----------------------------------------------------------------------------
/**
* @since 3.4.6
* @experimental
* @category pattern matching
*/
<A, E, R, A2, E2, R2, A3, E3, R3>(
self: Micro<A, E, R>,
options: {
readonly onFailure: (cause: MicroCause<E>) => Micro<A2, E2, R2>
readonly onSuccess: (a: A) => Micro<A3, E3, R3>
}
): Micro<A2 | A3, E2 | E3, R2 | R3 | R>
} = dual(
2,
<A, E, R, A2, E2, R2, A3, E3, R3>(
self: Micro<A, E, R>,
options: {
readonly onFailure: (cause: MicroCause<E>) => Micro<A2, E2, R2>
readonly onSuccess: (a: A) => Micro<A3, E3, R3>
}
): Micro<A2 | A3, E2 | E3, R2 | R3 | R> => {
const primitive = Object.create(OnSuccessAndFailureProto)
primitive[args] = self
primitive[successCont] = options.onSuccess
primitive[failureCont] = options.onFailure
return primitive
}
)
const OnSuccessAndFailureProto = makePrimitiveProto({
op: "OnSuccessAndFailure",
eval(this: any, fiber: MicroFiberImpl): Primitive {
fiber._stack.push(this)
return this[args]
}
})
/**
* @since 3.4.6
* @experimental
* @category pattern matching
*/
export const matchCause: {
/**
* @since 3.4.6
* @experimental
* @category pattern matching
*/
<E, A2, A, A3>(
options: {
readonly onFailure: (cause: MicroCause<E>) => A2
readonly onSuccess: (a: A) => A3
}
): <R>(self: Micro<A, E, R>) => Micro<A2 | A3, never, R>
/**
* @since 3.4.6
* @experimental
* @category pattern matching
*/
<A, E, R, A2, A3>(
self: Micro<A, E, R>,
options: {
readonly onFailure: (cause: MicroCause<E>) => A2
readonly onSuccess: (a: A) => A3
}
): Micro<A2 | A3, never, R>
} = dual(
2,
<A, E, R, A2, A3>(
self: Micro<A, E, R>,
options: {
readonly onFailure: (cause: MicroCause<E>) => A2
readonly onSuccess: (a: A) => A3
}
): Micro<A2 | A3, never, R> =>
matchCauseEffect(self, {
onFailure: (cause) => sync(() => options.onFailure(cause)),
onSuccess: (value) => sync(() => options.onSuccess(value))
})
)
/**
* @since 3.4.6
* @experimental
* @category pattern matching
*/
export const matchEffect: {
/**
* @since 3.4.6
* @experimental
* @category pattern matching
*/
<E, A2, E2, R2, A, A3, E3, R3>(
options: {
readonly onFailure: (e: E) => Micro<A2, E2, R2>
readonly onSuccess: (a: A) => Micro<A3, E3, R3>
}
): <R>(self: Micro<A, E, R>) => Micro<A2 | A3, E2 | E3, R2 | R3 | R>
/**
* @since 3.4.6
* @experimental
* @category pattern matching
*/
<A, E, R, A2, E2, R2, A3, E3, R3>(
self: Micro<A, E, R>,
options: {
readonly onFailure: (e: E) => Micro<A2, E2, R2>
readonly onSuccess: (a: A) => Micro<A3, E3, R3>
}
): Micro<A2 | A3, E2 | E3, R2 | R3 | R>
} = dual(
2,
<A, E, R, A2, E2, R2, A3, E3, R3>(
self: Micro<A, E, R>,
options: {
readonly onFailure: (e: E) => Micro<A2, E2, R2>
readonly onSuccess: (a: A) => Micro<A3, E3, R3>
}
): Micro<A2 | A3, E2 | E3, R2 | R3 | R> =>
matchCauseEffect(self, {
onFailure: (cause) => cause._tag === "Fail" ? options.onFailure(cause.error) : failCause(cause),
onSuccess: options.onSuccess
})
)
/**
* @since 3.4.0
* @experimental
* @category pattern matching
*/
export const match: {
/**
* @since 3.4.0
* @experimental
* @category pattern matching
*/
<E, A2, A, A3>(
options: {
readonly onFailure: (error: E) => A2
readonly onSuccess: (value: A) => A3
}
): <R>(self: Micro<A, E, R>) => Micro<A2 | A3, never, R>
/**
* @since 3.4.0
* @experimental
* @category pattern matching
*/
<A, E, R, A2, A3>(
self: Micro<A, E, R>,
options: {
readonly onFailure: (error: E) => A2
readonly onSuccess: (value: A) => A3
}
): Micro<A2 | A3, never, R>
} = dual(
2,
<A, E, R, A2, A3>(
self: Micro<A, E, R>,
options: {
readonly onFailure: (error: E) => A2
readonly onSuccess: (value: A) => A3
}
): Micro<A2 | A3, never, R> =>
matchEffect(self, {
onFailure: (error) => sync(() => options.onFailure(error)),
onSuccess: (value) => sync(() => options.onSuccess(value))
})
)
// ----------------------------------------------------------------------------
// delays & timeouts
// ----------------------------------------------------------------------------
/**
* Create a `Micro` effect that will sleep for the specified duration.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
export const sleep = (millis: number): Micro<void> =>
async((resume) => {
const timeout = setTimeout(() => {
resume(void_)
}, millis)
return sync(() => {
clearTimeout(timeout)
})
})
/**
* Returns an effect that will delay the execution of this effect by the
* specified duration.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
export const delay: {
/**
* Returns an effect that will delay the execution of this effect by the
* specified duration.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
(millis: number): <A, E, R>(self: Micro<A, E, R>) => Micro<A, E, R>
/**
* Returns an effect that will delay the execution of this effect by the
* specified duration.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
<A, E, R>(self: Micro<A, E, R>, millis: number): Micro<A, E, R>
} = dual(
2,
<A, E, R>(self: Micro<A, E, R>, millis: number): Micro<A, E, R> => andThen(sleep(millis), self)
)
/**
* Returns an effect that will timeout this effect, that will execute the
* fallback effect if the timeout elapses before the effect has produced a value.
*
* If the timeout elapses, the running effect will be safely interrupted.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
export const timeoutOrElse: {
/**
* Returns an effect that will timeout this effect, that will execute the
* fallback effect if the timeout elapses before the effect has produced a value.
*
* If the timeout elapses, the running effect will be safely interrupted.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
<A2, E2, R2>(
options: {
readonly duration: number
readonly onTimeout: LazyArg<Micro<A2, E2, R2>>
}
): <A, E, R>(self: Micro<A, E, R>) => Micro<A | A2, E | E2, R | R2>
/**
* Returns an effect that will timeout this effect, that will execute the
* fallback effect if the timeout elapses before the effect has produced a value.
*
* If the timeout elapses, the running effect will be safely interrupted.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
<A, E, R, A2, E2, R2>(
self: Micro<A, E, R>,
options: {
readonly duration: number
readonly onTimeout: LazyArg<Micro<A2, E2, R2>>
}
): Micro<A | A2, E | E2, R | R2>
} = dual(
2,
<A, E, R, A2, E2, R2>(self: Micro<A, E, R>, options: {
readonly duration: number
readonly onTimeout: LazyArg<Micro<A2, E2, R2>>
}): Micro<A | A2, E | E2, R | R2> =>
raceFirst(self, andThen(interruptible(sleep(options.duration)), options.onTimeout))
)
/**
* Returns an effect that will timeout this effect, that will fail with a
* `TimeoutException` if the timeout elapses before the effect has produced a
* value.
*
* If the timeout elapses, the running effect will be safely interrupted.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
export const timeout: {
/**
* Returns an effect that will timeout this effect, that will fail with a
* `TimeoutException` if the timeout elapses before the effect has produced a
* value.
*
* If the timeout elapses, the running effect will be safely interrupted.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
(millis: number): <A, E, R>(self: Micro<A, E, R>) => Micro<A, E | TimeoutException, R>
/**
* Returns an effect that will timeout this effect, that will fail with a
* `TimeoutException` if the timeout elapses before the effect has produced a
* value.
*
* If the timeout elapses, the running effect will be safely interrupted.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
<A, E, R>(self: Micro<A, E, R>, millis: number): Micro<A, E | TimeoutException, R>
} = dual(
2,
<A, E, R>(self: Micro<A, E, R>, millis: number): Micro<A, E | TimeoutException, R> =>
timeoutOrElse(self, { duration: millis, onTimeout: () => fail(new TimeoutException()) })
)
/**
* Returns an effect that will timeout this effect, succeeding with a `None`
* if the timeout elapses before the effect has produced a value; and `Some` of
* the produced value otherwise.
*
* If the timeout elapses, the running effect will be safely interrupted.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
export const timeoutOption: {
/**
* Returns an effect that will timeout this effect, succeeding with a `None`
* if the timeout elapses before the effect has produced a value; and `Some` of
* the produced value otherwise.
*
* If the timeout elapses, the running effect will be safely interrupted.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
(millis: number): <A, E, R>(self: Micro<A, E, R>) => Micro<Option.Option<A>, E, R>
/**
* Returns an effect that will timeout this effect, succeeding with a `None`
* if the timeout elapses before the effect has produced a value; and `Some` of
* the produced value otherwise.
*
* If the timeout elapses, the running effect will be safely interrupted.
*
* @since 3.4.0
* @experimental
* @category delays & timeouts
*/
<A, E, R>(self: Micro<A, E, R>, millis: number): Micro<Option.Option<A>, E, R>
} = dual(
2,
<A, E, R>(self: Micro<A, E, R>, millis: number): Micro<Option.Option<A>, E, R> =>
raceFirst(
asSome(self),
as(interruptible(sleep(millis)), Option.none())
)
)
// ----------------------------------------------------------------------------
// resources & finalization
// ----------------------------------------------------------------------------
/**
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export const MicroScopeTypeId: unique symbol = Symbol.for("effect/Micro/MicroScope")
/**
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export type MicroScopeTypeId = typeof MicroScopeTypeId
/**
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export interface MicroScope {
readonly [MicroScopeTypeId]: MicroScopeTypeId
readonly addFinalizer: (finalizer: (exit: MicroExit<unknown, unknown>) => Micro<void>) => Micro<void>
readonly fork: Micro<MicroScope.Closeable>
}
/**
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export declare namespace MicroScope {
/**
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export interface Closeable extends MicroScope {
readonly close: (exit: MicroExit<any, any>) => Micro<void>
}
}
/**
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export const MicroScope: Context.Tag<MicroScope, MicroScope> = Context.GenericTag<MicroScope>("effect/Micro/MicroScope")
class MicroScopeImpl implements MicroScope.Closeable {
readonly [MicroScopeTypeId]: MicroScopeTypeId
state: {
readonly _tag: "Open"
readonly finalizers: Set<(exit: MicroExit<any, any>) => Micro<void>>
} | {
readonly _tag: "Closed"
readonly exit: MicroExit<any, any>
} = { _tag: "Open", finalizers: new Set() }
constructor() {
this[MicroScopeTypeId] = MicroScopeTypeId
}
unsafeAddFinalizer(finalizer: (exit: MicroExit<any, any>) => Micro<void>): void {
if (this.state._tag === "Open") {
this.state.finalizers.add(finalizer)
}
}
addFinalizer(finalizer: (exit: MicroExit<any, any>) => Micro<void>): Micro<void> {
return suspend(() => {
if (this.state._tag === "Open") {
this.state.finalizers.add(finalizer)
return void_
}
return finalizer(this.state.exit)
})
}
unsafeRemoveFinalizer(finalizer: (exit: MicroExit<any, any>) => Micro<void>): void {
if (this.state._tag === "Open") {
this.state.finalizers.delete(finalizer)
}
}
close(microExit: MicroExit<any, any>): Micro<void> {
return suspend(() => {
if (this.state._tag === "Open") {
const finalizers = Array.from(this.state.finalizers).reverse()
this.state = { _tag: "Closed", exit: microExit }
return flatMap(
forEach(finalizers, (finalizer) => exit(finalizer(microExit))),
exitVoidAll
)
}
return void_
})
}
get fork() {
return sync(() => {
const newScope = new MicroScopeImpl()
if (this.state._tag === "Closed") {
newScope.state = this.state
return newScope
}
function fin(exit: MicroExit<any, any>) {
return newScope.close(exit)
}
this.state.finalizers.add(fin)
newScope.unsafeAddFinalizer((_) => sync(() => this.unsafeRemoveFinalizer(fin)))
return newScope
})
}
}
/**
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export const scopeMake: Micro<MicroScope.Closeable> = sync(() => new MicroScopeImpl())
/**
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export const scopeUnsafeMake = (): MicroScope.Closeable => new MicroScopeImpl()
/**
* Access the current `MicroScope`.
*
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export const scope: Micro<MicroScope, never, MicroScope> = service(MicroScope)
/**
* Provide a `MicroScope` to an effect.
*
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export const provideScope: {
/**
* Provide a `MicroScope` to an effect.
*
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
(scope: MicroScope): <A, E, R>(self: Micro<A, E, R>) => Micro<A, E, Exclude<R, MicroScope>>
/**
* Provide a `MicroScope` to an effect.
*
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
<A, E, R>(self: Micro<A, E, R>, scope: MicroScope): Micro<A, E, Exclude<R, MicroScope>>
} = dual(
2,
<A, E, R>(self: Micro<A, E, R>, scope: MicroScope): Micro<A, E, Exclude<R, MicroScope>> =>
provideService(self, MicroScope, scope)
)
/**
* Provide a `MicroScope` to the given effect, closing it after the effect has
* finished executing.
*
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export const scoped = <A, E, R>(self: Micro<A, E, R>): Micro<A, E, Exclude<R, MicroScope>> =>
suspend(() => {
const scope = new MicroScopeImpl()
return onExit(provideService(self, MicroScope, scope), (exit) => scope.close(exit))
})
/**
* Create a resource with a cleanup `Micro` effect, ensuring the cleanup is
* executed when the `MicroScope` is closed.
*
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export const acquireRelease = <A, E, R>(
acquire: Micro<A, E, R>,
release: (a: A, exit: MicroExit<unknown, unknown>) => Micro<void>
): Micro<A, E, R | MicroScope> =>
uninterruptible(flatMap(
scope,
(scope) => tap(acquire, (a) => scope.addFinalizer((exit) => release(a, exit)))
))
/**
* Add a finalizer to the current `MicroScope`.
*
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export const addFinalizer = (
finalizer: (exit: MicroExit<unknown, unknown>) => Micro<void>
): Micro<void, never, MicroScope> => flatMap(scope, (scope) => scope.addFinalizer(finalizer))
/**
* When the `Micro` effect is completed, run the given finalizer effect with the
* `MicroExit` of the executed effect.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
export const onExit: {
/**
* When the `Micro` effect is completed, run the given finalizer effect with the
* `MicroExit` of the executed effect.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
<A, E, XE, XR>(f: (exit: MicroExit<A, E>) => Micro<void, XE, XR>): <R>(self: Micro<A, E, R>) => Micro<A, E | XE, R | XR>
/**
* When the `Micro` effect is completed, run the given finalizer effect with the
* `MicroExit` of the executed effect.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
<A, E, R, XE, XR>(self: Micro<A, E, R>, f: (exit: MicroExit<A, E>) => Micro<void, XE, XR>): Micro<A, E | XE, R | XR>
} = dual(
2,
<A, E, R, XE, XR>(
self: Micro<A, E, R>,
f: (exit: MicroExit<A, E>) => Micro<void, XE, XR>
): Micro<A, E | XE, R | XR> =>
uninterruptibleMask((restore) =>
matchCauseEffect(restore(self), {
onFailure: (cause) => flatMap(f(exitFailCause(cause)), () => failCause(cause)),
onSuccess: (a) => flatMap(f(exitSucceed(a)), () => succeed(a))
})
)
)
/**
* Regardless of the result of the this `Micro` effect, run the finalizer effect.
*
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export const ensuring: {
/**
* Regardless of the result of the this `Micro` effect, run the finalizer effect.
*
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
<XE, XR>(finalizer: Micro<void, XE, XR>): <A, E, R>(self: Micro<A, E, R>) => Micro<A, E | XE, R | XR>
/**
* Regardless of the result of the this `Micro` effect, run the finalizer effect.
*
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
<A, E, R, XE, XR>(self: Micro<A, E, R>, finalizer: Micro<void, XE, XR>): Micro<A, E | XE, R | XR>
} = dual(
2,
<A, E, R, XE, XR>(
self: Micro<A, E, R>,
finalizer: Micro<void, XE, XR>
): Micro<A, E | XE, R | XR> => onExit(self, (_) => finalizer)
)
/**
* When the `Micro` effect is completed, run the given finalizer effect if it
* matches the specified predicate.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
export const onExitIf: {
/**
* When the `Micro` effect is completed, run the given finalizer effect if it
* matches the specified predicate.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
<A, E, XE, XR, B extends MicroExit<A, E>>(
refinement: Refinement<MicroExit<A, E>, B>,
f: (exit: B) => Micro<void, XE, XR>
): <R>(self: Micro<A, E, R>) => Micro<A, E | XE, R | XR>
/**
* When the `Micro` effect is completed, run the given finalizer effect if it
* matches the specified predicate.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
<A, E, XE, XR>(
predicate: Predicate<MicroExit<NoInfer<A>, NoInfer<E>>>,
f: (exit: MicroExit<NoInfer<A>, NoInfer<E>>) => Micro<void, XE, XR>
): <R>(self: Micro<A, E, R>) => Micro<A, E | XE, R | XR>
/**
* When the `Micro` effect is completed, run the given finalizer effect if it
* matches the specified predicate.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
<A, E, R, XE, XR, B extends MicroExit<A, E>>(
self: Micro<A, E, R>,
refinement: Refinement<MicroExit<A, E>, B>,
f: (exit: B) => Micro<void, XE, XR>
): Micro<A, E | XE, R | XR>
/**
* When the `Micro` effect is completed, run the given finalizer effect if it
* matches the specified predicate.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
<A, E, R, XE, XR>(
self: Micro<A, E, R>,
predicate: Predicate<MicroExit<NoInfer<A>, NoInfer<E>>>,
f: (exit: MicroExit<NoInfer<A>, NoInfer<E>>) => Micro<void, XE, XR>
): Micro<A, E | XE, R | XR>
} = dual(
3,
<A, E, R, XE, XR, B extends MicroExit<A, E>>(
self: Micro<A, E, R>,
refinement: Refinement<MicroExit<A, E>, B>,
f: (exit: B) => Micro<void, XE, XR>
): Micro<A, E | XE, R | XR> => onExit(self, (exit) => (refinement(exit) ? f(exit) : exitVoid))
)
/**
* When the `Micro` effect fails, run the given finalizer effect with the
* `MicroCause` of the executed effect.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
export const onError: {
/**
* When the `Micro` effect fails, run the given finalizer effect with the
* `MicroCause` of the executed effect.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
<A, E, XE, XR>(f: (cause: MicroCause<NoInfer<E>>) => Micro<void, XE, XR>): <R>(self: Micro<A, E, R>) => Micro<A, E | XE, R | XR>
/**
* When the `Micro` effect fails, run the given finalizer effect with the
* `MicroCause` of the executed effect.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
<A, E, R, XE, XR>(
self: Micro<A, E, R>,
f: (cause: MicroCause<NoInfer<E>>) => Micro<void, XE, XR>
): Micro<A, E | XE, R | XR>
} = dual(
2,
<A, E, R, XE, XR>(
self: Micro<A, E, R>,
f: (cause: MicroCause<NoInfer<E>>) => Micro<void, XE, XR>
): Micro<A, E | XE, R | XR> => onExitIf(self, exitIsFailure, (exit) => f(exit.cause))
)
/**
* If this `Micro` effect is aborted, run the finalizer effect.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
export const onInterrupt: {
/**
* If this `Micro` effect is aborted, run the finalizer effect.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
<XE, XR>(finalizer: Micro<void, XE, XR>): <A, E, R>(self: Micro<A, E, R>) => Micro<A, E | XE, R | XR>
/**
* If this `Micro` effect is aborted, run the finalizer effect.
*
* @since 3.4.6
* @experimental
* @category resources & finalization
*/
<A, E, R, XE, XR>(self: Micro<A, E, R>, finalizer: Micro<void, XE, XR>): Micro<A, E | XE, R | XR>
} = dual(
2,
<A, E, R, XE, XR>(self: Micro<A, E, R>, finalizer: Micro<void, XE, XR>): Micro<A, E | XE, R | XR> =>
onExitIf(self, exitIsInterrupt, (_) => finalizer)
)
/**
* Acquire a resource, use it, and then release the resource when the `use`
* effect has completed.
*
* @since 3.4.0
* @experimental
* @category resources & finalization
*/
export const acquireUseRelease = <Resource, E, R, A, E2, R2, E3, R3>(
acquire: Micro<Resource, E, R>,
use: (a: Resource) => Micro<A, E2, R2>,
release: (a: Resource, exit: MicroExit<A, E2>) => Micro<void, E3, R3>
): Micro<A, E | E2 | E3, R | R2 | R3> =>
uninterruptibleMask((restore) =>
flatMap(
acquire,
(a) =>
flatMap(
exit(restore(use(a))),
(exit) => andThen(release(a, exit), exit)
)
)
)
// ----------------------------------------------------------------------------
// interruption
// ----------------------------------------------------------------------------
/**
* Abort the current `Micro` effect.
*
* @since 3.4.6
* @experimental
* @category interruption
*/
export const interrupt: Micro<never> = failCause(causeInterrupt())
/**
* Flag the effect as uninterruptible, which means that when the effect is
* interrupted, it will be allowed to continue running until completion.
*
* @since 3.4.0
* @experimental
* @category flags
*/
export const uninterruptible = <A, E, R>(
self: Micro<A, E, R>
): Micro<A, E, R> =>
withMicroFiber((fiber) => {
if (!fiber.interruptible) return self
fiber.interruptible = false
fiber._stack.push(setInterruptible(true))
return self
})
const setInterruptible: (interruptible: boolean) => Primitive = makePrimitive({
op: "SetInterruptible",
ensure(fiber) {
fiber.interruptible = this[args]
if (fiber._interrupted && fiber.interruptible) {
return () => exitInterrupt
}
}
})
/**
* Flag the effect as interruptible, which means that when the effect is
* interrupted, it will be interrupted immediately.
*
* @since 3.4.0
* @experimental
* @category flags
*/
export const interruptible = <A, E, R>(
self: Micro<A, E, R>
): Micro<A, E, R> =>
withMicroFiber((fiber) => {
if (fiber.interruptible) return self
fiber.interruptible = true
fiber._stack.push(setInterruptible(false))
if (fiber._interrupted) return exitInterrupt
return self
})
/**
* Wrap the given `Micro` effect in an uninterruptible region, preventing the
* effect from being aborted.
*
* You can use the `restore` function to restore a `Micro` effect to the
* interruptibility state before the `uninterruptibleMask` was applied.
*
* @example
* ```ts
* import * as Micro from "effect/Micro"
*
* Micro.uninterruptibleMask((restore) =>
* Micro.sleep(1000).pipe( // uninterruptible
* Micro.andThen(restore(Micro.sleep(1000))) // interruptible
* )
* )
* ```
*
* @since 3.4.0
* @experimental
* @category interruption
*/
export const uninterruptibleMask = <A, E, R>(
f: (
restore: <A, E, R>(effect: Micro<A, E, R>) => Micro<A, E, R>
) => Micro<A, E, R>
): Micro<A, E, R> =>
withMicroFiber((fiber) => {
if (!fiber.interruptible) return f(identity)
fiber.interruptible = false
fiber._stack.push(setInterruptible(true))
return f(interruptible)
})
// ========================================================================
// collecting & elements
// ========================================================================
/**
* @since 3.4.0
* @experimental
*/
export declare namespace All {
/**
* @since 3.4.0
* @experimental
*/
export type MicroAny = Micro<any, any, any>
/**
* @since 3.4.0
* @experimental
*/
export type ReturnIterable<T extends Iterable<MicroAny>, Discard extends boolean> = [T] extends
[Iterable<Micro<infer A, infer E, infer R>>] ? Micro<
Discard extends true ? void : Array<A>,
E,
R
>
: never
/**
* @since 3.4.0
* @experimental
*/
export type ReturnTuple<T extends ReadonlyArray<unknown>, Discard extends boolean> = Micro<
Discard extends true ? void
: T[number] extends never ? []
: { -readonly [K in keyof T]: T[K] extends Micro<infer _A, infer _E, infer _R> ? _A : never },
T[number] extends never ? never
: T[number] extends Micro<infer _A, infer _E, infer _R> ? _E
: never,
T[number] extends never ? never
: T[number] extends Micro<infer _A, infer _E, infer _R> ? _R
: never
> extends infer X ? X : never
/**
* @since 3.4.0
* @experimental
*/
export type ReturnObject<T, Discard extends boolean> = [T] extends [{ [K: string]: MicroAny }] ? Micro<
Discard extends true ? void :
{ -readonly [K in keyof T]: [T[K]] extends [Micro<infer _A, infer _E, infer _R>] ? _A : never },
keyof T extends never ? never
: T[keyof T] extends Micro<infer _A, infer _E, infer _R> ? _E
: never,
keyof T extends never ? never
: T[keyof T] extends Micro<infer _A, infer _E, infer _R> ? _R
: never
>
: never
/**
* @since 3.4.0
* @experimental
*/
export type IsDiscard<A> = [Extract<A, { readonly discard: true }>] extends [never] ? false : true
/**
* @since 3.4.0
* @experimental
*/
export type Return<
Arg extends Iterable<MicroAny> | Record<string, MicroAny>,
O extends NoExcessProperties<{
readonly concurrency?: Concurrency | undefined
readonly discard?: boolean | undefined
}, O>
> = [Arg] extends [ReadonlyArray<MicroAny>] ? ReturnTuple<Arg, IsDiscard<O>>
: [Arg] extends [Iterable<MicroAny>] ? ReturnIterable<Arg, IsDiscard<O>>
: [Arg] extends [Record<string, MicroAny>] ? ReturnObject<Arg, IsDiscard<O>>
: never
}
/**
* Runs all the provided effects in sequence respecting the structure provided in input.
*
* Supports multiple arguments, a single argument tuple / array or record / struct.
*
* @since 3.4.0
* @experimental
* @category collecting & elements
*/
export const all = <
const Arg extends Iterable<Micro<any, any, any>> | Record<string, Micro<any, any, any>>,
O extends NoExcessProperties<{
readonly concurrency?: Concurrency | undefined
readonly discard?: boolean | undefined
}, O>
>(arg: Arg, options?: O): All.Return<Arg, O> => {
if (Array.isArray(arg) || isIterable(arg)) {
return (forEach as any)(arg, identity, options)
} else if (options?.discard) {
return (forEach as any)(Object.values(arg), identity, options)
}
return suspend(() => {
const out: Record<string, unknown> = {}
return as(
forEach(Object.entries(arg), ([key, effect]) =>
map(effect, (value) => {
out[key] = value
}), {
discard: true,
concurrency: options?.concurrency
}),
out
)
}) as any
}
/**
* @since 3.11.0
* @experimental
* @category collecting & elements
*/
export const whileLoop: <A, E, R>(options: {
readonly while: LazyArg<boolean>
readonly body: LazyArg<Micro<A, E, R>>
readonly step: (a: A) => void
}) => Micro<void, E, R> = makePrimitive({
op: "While",
contA(value, fiber) {
this[args].step(value)
if (this[args].while()) {
fiber._stack.push(this)
return this[args].body()
}
return exitVoid
},
eval(fiber) {
if (this[args].while()) {
fiber._stack.push(this)
return this[args].body()
}
return exitVoid
}
})
/**
* For each element of the provided iterable, run the effect and collect the
* results.
*
* If the `discard` option is set to `true`, the results will be discarded and
* the effect will return `void`.
*
* The `concurrency` option can be set to control how many effects are run
* concurrently. By default, the effects are run sequentially.
*
* @since 3.4.0
* @experimental
* @category collecting & elements
*/
export const forEach: {
/**
* For each element of the provided iterable, run the effect and collect the
* results.
*
* If the `discard` option is set to `true`, the results will be discarded and
* the effect will return `void`.
*
* The `concurrency` option can be set to control how many effects are run
* concurrently. By default, the effects are run sequentially.
*
* @since 3.4.0
* @experimental
* @category collecting & elements
*/
<A, B, E, R>(
iterable: Iterable<A>,
f: (a: A, index: number) => Micro<B, E, R>,
options?: {
readonly concurrency?: Concurrency | undefined
readonly discard?: false | undefined
}
): Micro<Array<B>, E, R>
/**
* For each element of the provided iterable, run the effect and collect the
* results.
*
* If the `discard` option is set to `true`, the results will be discarded and
* the effect will return `void`.
*
* The `concurrency` option can be set to control how many effects are run
* concurrently. By default, the effects are run sequentially.
*
* @since 3.4.0
* @experimental
* @category collecting & elements
*/
<A, B, E, R>(
iterable: Iterable<A>,
f: (a: A, index: number) => Micro<B, E, R>,
options: {
readonly concurrency?: Concurrency | undefined
readonly discard: true
}
): Micro<void, E, R>
} = <
A,
B,
E,
R
>(iterable: Iterable<A>, f: (a: A, index: number) => Micro<B, E, R>, options?: {
readonly concurrency?: Concurrency | undefined
readonly discard?: boolean | undefined
}): Micro<any, E, R> =>
withMicroFiber((parent) => {
const concurrencyOption = options?.concurrency === "inherit"
? parent.getRef(CurrentConcurrency)
: options?.concurrency ?? 1
const concurrency = concurrencyOption === "unbounded"
? Number.POSITIVE_INFINITY
: Math.max(1, concurrencyOption)
const items = Arr.fromIterable(iterable)
let length = items.length
if (length === 0) {
return options?.discard ? void_ : succeed([])
}
const out: Array<B> | undefined = options?.discard ? undefined : new Array(length)
let index = 0
if (concurrency === 1) {
return as(
whileLoop({
while: () => index < items.length,
body: () => f(items[index], index),
step: out ?
(b) => out[index++] = b :
(_) => index++
}),
out as any
)
}
return async((resume) => {
const fibers = new Set<MicroFiber<unknown, unknown>>()
let result: MicroExit<any, any> | undefined = undefined
let inProgress = 0
let doneCount = 0
let pumping = false
let interrupted = false
function pump() {
pumping = true
while (inProgress < concurrency && index < length) {
const currentIndex = index
const item = items[currentIndex]
index++
inProgress++
try {
const child = unsafeFork(parent, f(item, currentIndex), true, true)
fibers.add(child)
child.addObserver((exit) => {
fibers.delete(child)
if (interrupted) {
return
} else if (exit._tag === "Failure") {
if (result === undefined) {
result = exit
length = index
fibers.forEach((fiber) => fiber.unsafeInterrupt())
}
} else if (out !== undefined) {
out[currentIndex] = exit.value
}
doneCount++
inProgress--
if (doneCount === length) {
resume(result ?? succeed(out))
} else if (!pumping && inProgress < concurrency) {
pump()
}
})
} catch (err) {
result = exitDie(err)
length = index
fibers.forEach((fiber) => fiber.unsafeInterrupt())
}
}
pumping = false
}
pump()
return suspend(() => {
interrupted = true
index = length
return fiberInterruptAll(fibers)
})
})
})
/**
* Effectfully filter the elements of the provided iterable.
*
* Use the `concurrency` option to control how many elements are processed
* concurrently.
*
* @since 3.4.0
* @experimental
* @category collecting & elements
*/
export const filter = <A, E, R>(iterable: Iterable<A>, f: (a: NoInfer<A>) => Micro<boolean, E, R>, options?: {
readonly concurrency?: Concurrency | undefined
readonly negate?: boolean | undefined
}): Micro<Array<A>, E, R> =>
filterMap(iterable, (a) =>
map(f(a), (pass) => {
pass = options?.negate ? !pass : pass
return pass ? Option.some(a) : Option.none()
}), options)
/**
* Effectfully filter the elements of the provided iterable.
*
* Use the `concurrency` option to control how many elements are processed
* concurrently.
*
* @since 3.4.0
* @experimental
* @category collecting & elements
*/
export const filterMap = <A, B, E, R>(
iterable: Iterable<A>,
f: (a: NoInfer<A>) => Micro<Option.Option<B>, E, R>,
options?: {
readonly concurrency?: Concurrency | undefined
}
): Micro<Array<B>, E, R> =>
suspend(() => {
const out: Array<B> = []
return as(
forEach(iterable, (a) =>
map(f(a), (o) => {
if (o._tag === "Some") {
out.push(o.value)
}
}), {
discard: true,
concurrency: options?.concurrency
}),
out
)
})
// ----------------------------------------------------------------------------
// do notation
// ----------------------------------------------------------------------------
/**
* Start a do notation block.
*
* @since 3.4.0
* @experimental
* @category do notation
*/
export const Do: Micro<{}> = succeed({})
/**
* Bind the success value of this `Micro` effect to the provided name.
*
* @since 3.4.0
* @experimental
* @category do notation
*/
export const bindTo: {
/**
* Bind the success value of this `Micro` effect to the provided name.
*
* @since 3.4.0
* @experimental
* @category do notation
*/
<N extends string>(name: N): <A, E, R>(self: Micro<A, E, R>) => Micro<{ [K in N]: A }, E, R>
/**
* Bind the success value of this `Micro` effect to the provided name.
*
* @since 3.4.0
* @experimental
* @category do notation
*/
<A, E, R, N extends string>(self: Micro<A, E, R>, name: N): Micro<{ [K in N]: A }, E, R>
} = doNotation.bindTo<MicroTypeLambda>(map)
/**
* Bind the success value of this `Micro` effect to the provided name.
*
* @since 3.4.0
* @experimental
* @category do notation
*/
export const bind: {
/**
* Bind the success value of this `Micro` effect to the provided name.
*
* @since 3.4.0
* @experimental
* @category do notation
*/
<N extends string, A extends Record<string, any>, B, E2, R2>(name: N, f: (a: NoInfer<A>) => Micro<B, E2, R2>): <E, R>(self: Micro<A, E, R>) => Micro<Simplify<Omit<A, N> & { [K in N]: B }>, E | E2, R | R2>
/**
* Bind the success value of this `Micro` effect to the provided name.
*
* @since 3.4.0
* @experimental
* @category do notation
*/
<A extends Record<string, any>, E, R, B, E2, R2, N extends string>(self: Micro<A, E, R>, name: N, f: (a: NoInfer<A>) => Micro<B, E2, R2>): Micro<Simplify<Omit<A, N> & { [K in N]: B }>, E | E2, R | R2>
} = doNotation.bind<MicroTypeLambda>(map, flatMap)
const let_: {
<N extends string, A extends Record<string, any>, B>(
name: N,
f: (a: NoInfer<A>) => B
): <E, R>(self: Micro<A, E, R>) => Micro<Simplify<Omit<A, N> & { [K in N]: B }>, E, R>
<A extends Record<string, any>, E, R, B, N extends string>(
self: Micro<A, E, R>,
name: N,
f: (a: NoInfer<A>) => B
): Micro<Simplify<Omit<A, N> & { [K in N]: B }>, E, R>
} = doNotation.let_<MicroTypeLambda>(map)
export {
/**
* Bind the result of a synchronous computation to the given name.
*
* @since 3.4.0
* @experimental
* @category do notation
*/
let_ as let
}
// ----------------------------------------------------------------------------
// fibers & forking
// ----------------------------------------------------------------------------
/**
* Run the `Micro` effect in a new `MicroFiber` that can be awaited, joined, or
* aborted.
*
* When the parent `Micro` finishes, this `Micro` will be aborted.
*
* @since 3.4.0
* @experimental
* @category fiber & forking
*/
export const fork = <A, E, R>(
self: Micro<A, E, R>
): Micro<MicroFiber<A, E>, never, R> =>
withMicroFiber((fiber) => {
fiberMiddleware.interruptChildren ??= fiberInterruptChildren
return succeed(unsafeFork(fiber, self))
})
const unsafeFork = <FA, FE, A, E, R>(
parent: MicroFiberImpl<FA, FE>,
effect: Micro<A, E, R>,
immediate = false,
daemon = false
): MicroFiber<A, E> => {
const child = new MicroFiberImpl<A, E>(parent.context, parent.interruptible)
if (!daemon) {
parent.children().add(child)
child.addObserver(() => parent.children().delete(child))
}
if (immediate) {
child.evaluate(effect as any)
} else {
parent.getRef(CurrentScheduler).scheduleTask(() => child.evaluate(effect as any), 0)
}
return child
}
/**
* Run the `Micro` effect in a new `MicroFiber` that can be awaited, joined, or
* aborted.
*
* It will not be aborted when the parent `Micro` finishes.
*
* @since 3.4.0
* @experimental
* @category fiber & forking
*/
export const forkDaemon = <A, E, R>(
self: Micro<A, E, R>
): Micro<MicroFiber<A, E>, never, R> => withMicroFiber((fiber) => succeed(unsafeFork(fiber, self, false, true)))
/**
* Run the `Micro` effect in a new `MicroFiber` that can be awaited, joined, or
* aborted.
*
* The lifetime of the handle will be attached to the provided `MicroScope`.
*
* @since 3.4.0
* @experimental
* @category fiber & forking
*/
export const forkIn: {
/**
* Run the `Micro` effect in a new `MicroFiber` that can be awaited, joined, or
* aborted.
*
* The lifetime of the handle will be attached to the provided `MicroScope`.
*
* @since 3.4.0
* @experimental
* @category fiber & forking
*/
(scope: MicroScope): <A, E, R>(self: Micro<A, E, R>) => Micro<MicroFiber<A, E>, never, R>
/**
* Run the `Micro` effect in a new `MicroFiber` that can be awaited, joined, or
* aborted.
*
* The lifetime of the handle will be attached to the provided `MicroScope`.
*
* @since 3.4.0
* @experimental
* @category fiber & forking
*/
<A, E, R>(self: Micro<A, E, R>, scope: MicroScope): Micro<MicroFiber<A, E>, never, R>
} = dual(
2,
<A, E, R>(self: Micro<A, E, R>, scope: MicroScope): Micro<MicroFiber<A, E>, never, R> =>
uninterruptibleMask((restore) =>
flatMap(scope.fork, (scope) =>
tap(
restore(forkDaemon(onExit(self, (exit) => scope.close(exit)))),
(fiber) => scope.addFinalizer((_) => fiberInterrupt(fiber))
))
)
)
/**
* Run the `Micro` effect in a new `MicroFiber` that can be awaited, joined, or
* aborted.
*
* The lifetime of the handle will be attached to the current `MicroScope`.
*
* @since 3.4.0
* @experimental
* @category fiber & forking
*/
export const forkScoped = <A, E, R>(self: Micro<A, E, R>): Micro<MicroFiber<A, E>, never, R | MicroScope> =>
flatMap(scope, (scope) => forkIn(self, scope))
// ----------------------------------------------------------------------------
// execution
// ----------------------------------------------------------------------------
/**
* Execute the `Micro` effect and return a `MicroFiber` that can be awaited, joined,
* or aborted.
*
* You can listen for the result by adding an observer using the handle's
* `addObserver` method.
*
* @example
* ```ts
* import * as Micro from "effect/Micro"
*
* const handle = Micro.succeed(42).pipe(
* Micro.delay(1000),
* Micro.runFork
* )
*
* handle.addObserver((exit) => {
* console.log(exit)
* })
* ```
*
* @since 3.4.0
* @experimental
* @category execution
*/
export const runFork = <A, E>(
effect: Micro<A, E>,
options?: {
readonly signal?: AbortSignal | undefined
readonly scheduler?: MicroScheduler | undefined
} | undefined
): MicroFiberImpl<A, E> => {
const fiber = new MicroFiberImpl<A, E>(CurrentScheduler.context(
options?.scheduler ?? new MicroSchedulerDefault()
))
fiber.evaluate(effect as any)
if (options?.signal) {
if (options.signal.aborted) {
fiber.unsafeInterrupt()
} else {
const abort = () => fiber.unsafeInterrupt()
options.signal.addEventListener("abort", abort, { once: true })
fiber.addObserver(() => options.signal!.removeEventListener("abort", abort))
}
}
return fiber
}
/**
* Execute the `Micro` effect and return a `Promise` that resolves with the
* `MicroExit` of the computation.
*
* @since 3.4.6
* @experimental
* @category execution
*/
export const runPromiseExit = <A, E>(
effect: Micro<A, E>,
options?: {
readonly signal?: AbortSignal | undefined
readonly scheduler?: MicroScheduler | undefined
} | undefined
): Promise<MicroExit<A, E>> =>
new Promise((resolve, _reject) => {
const handle = runFork(effect, options)
handle.addObserver(resolve)
})
/**
* Execute the `Micro` effect and return a `Promise` that resolves with the
* successful value of the computation.
*
* @since 3.4.0
* @experimental
* @category execution
*/
export const runPromise = <A, E>(
effect: Micro<A, E>,
options?: {
readonly signal?: AbortSignal | undefined
readonly scheduler?: MicroScheduler | undefined
} | undefined
): Promise<A> =>
runPromiseExit(effect, options).then((exit) => {
if (exit._tag === "Failure") {
throw exit.cause
}
return exit.value
})
/**
* Attempt to execute the `Micro` effect synchronously and return the `MicroExit`.
*
* If any asynchronous effects are encountered, the function will return a
* `CauseDie` containing the `MicroFiber`.
*
* @since 3.4.6
* @experimental
* @category execution
*/
export const runSyncExit = <A, E>(effect: Micro<A, E>): MicroExit<A, E> => {
const scheduler = new MicroSchedulerDefault()
const fiber = runFork(effect, { scheduler })
scheduler.flush()
return fiber._exit ?? exitDie(fiber)
}
/**
* Attempt to execute the `Micro` effect synchronously and return the success
* value.
*
* @since 3.4.0
* @experimental
* @category execution
*/
export const runSync = <A, E>(effect: Micro<A, E>): A => {
const exit = runSyncExit(effect)
if (exit._tag === "Failure") throw exit.cause
return exit.value
}
// ----------------------------------------------------------------------------
// Errors
// ----------------------------------------------------------------------------
/**
* @since 3.4.0
* @experimental
* @category errors
*/
export interface YieldableError extends Pipeable, Inspectable, Readonly<Error> {
readonly [Effectable.EffectTypeId]: Effect.VarianceStruct<never, this, never>
readonly [Effectable.StreamTypeId]: Stream.VarianceStruct<never, this, never>
readonly [Effectable.SinkTypeId]: Sink.VarianceStruct<never, unknown, never, this, never>
readonly [Effectable.ChannelTypeId]: Channel.VarianceStruct<never, unknown, this, unknown, never, unknown, never>
readonly [TypeId]: Micro.Variance<never, this, never>
[Symbol.iterator](): MicroIterator<Micro<never, this, never>>
}
const YieldableError: new(message?: string) => YieldableError = (function() {
class YieldableError extends globalThis.Error {}
// @effect-diagnostics-next-line floatingEffect:off
Object.assign(YieldableError.prototype, MicroProto, StructuralPrototype, {
[identifier]: "Failure",
[evaluate]() {
return fail(this)
},
toString(this: Error) {
return this.message ? `${this.name}: ${this.message}` : this.name
},
toJSON() {
return { ...this }
},
[NodeInspectSymbol](this: Error): string {
const stack = this.stack
if (stack) {
return `${this.toString()}\n${stack.split("\n").slice(1).join("\n")}`
}
return this.toString()
}
})
return YieldableError as any
})()
/**
* @since 3.4.0
* @experimental
* @category errors
*/
export const Error: new<A extends Record<string, any> = {}>(
args: Equals<A, {}> extends true ? void
: { readonly [P in keyof A]: A[P] }
) => YieldableError & Readonly<A> = (function() {
return class extends YieldableError {
constructor(args: any) {
super()
if (args) {
Object.assign(this, args)
}
}
} as any
})()
/**
* @since 3.4.0
* @experimental
* @category errors
*/
export const TaggedError = <Tag extends string>(tag: Tag): new<A extends Record<string, any> = {}>(
args: Equals<A, {}> extends true ? void
: { readonly [P in keyof A as P extends "_tag" ? never : P]: A[P] }
) => YieldableError & { readonly _tag: Tag } & Readonly<A> => {
class Base extends Error<{}> {
readonly _tag = tag
}
;(Base.prototype as any).name = tag
return Base as any
}
/**
* Represents a checked exception which occurs when an expected element was
* unable to be found.
*
* @since 3.4.4
* @experimental
* @category errors
*/
export class NoSuchElementException extends TaggedError("NoSuchElementException")<{ message?: string | undefined }> {}
/**
* Represents a checked exception which occurs when a timeout occurs.
*
* @since 3.4.4
* @experimental
* @category errors
*/
export class TimeoutException extends TaggedError("TimeoutException") {}