ParallelOpt4<A extends Object, B extends Object, C extends Object, D extends Object> class final

Runs four AsyncOpt recipes concurrently and combines their results into a typed record.

On run, all recipes start together. If all produce Val, the result is Val<(A, B, C, D)>. If any recipe produces Nil, the result is Nil.

No work happens until run is called. Each call to run re-executes all recipes — there is no hidden caching.

Exceptions thrown by recipes propagate; this class does not catch, retry, or convert thrown errors.

Annotations

• @experimental

Constructors

ParallelOpt4(AsyncOpt<A> a, AsyncOpt<B> b, AsyncOpt<C> c, AsyncOpt<D> d)

Creates a parallel combinator for four AsyncOpt recipes.

const

Properties

a → AsyncOpt<A>

The first recipe.

final

b → AsyncOpt<B>

The second recipe.

final

c → AsyncOpt<C>

The third recipe.

final

d → AsyncOpt<D>

The fourth recipe.

final

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

run() → OptionAsync<(A, B, C, D)>

Runs all recipes concurrently and combines results into a typed record.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited