Enum gluon_vm::future::FutureValue

pub enum FutureValue<F> where
    F: Future,  {
    Value(Result<F::Item, F::Error>),
    Future(F),
    Polled,
}

FutureValue holds either an already computed value or a Future which can be resolved into that value. This makes it possible to avoid creating an event loop for computions which run synchronously.

Variants

Value(Result<F::Item, F::Error>)Future(F)Polled

Methods

impl<F> FutureValue<F> where     F: Future,     F::Error: From<Error>,

pub fn sync_or_error(self) -> Result<F::Item, F::Error>

Returns the resolved value if it was synchronously computed or an error otherwise

impl<T, E> FutureValue<FutureResult<T, E>>

pub fn sync(result: Result<T, E>) -> FutureValue<FutureResult<T, E>>

impl<'f, F> FutureValue<F> where     F: Future + 'f,

pub fn boxed(     self ) -> FutureValue<Box<Future<Item = F::Item, Error = F::Error> + Send + 'f>> where     F: Send,

pub fn map<G, U>(self, g: G) -> FutureValue<Map<F, G>> where     G: FnOnce(F::Item) -> U,

pub fn map_err<G, U>(self, g: G) -> FutureValue<MapErr<F, G>> where     G: FnOnce(F::Error) -> U,

pub fn and_then<G, B>(     self,     g: G ) -> FutureValue<Either<B, AndThen<F, FutureValue<B>, G>>> where     G: FnOnce(F::Item) -> FutureValue<B>,     B: Future<Error = F::Error>,

pub fn then<G, B>(     self,     g: G ) -> FutureValue<Either<B, Then<F, FutureValue<B>, G>>> where     G: FnOnce(Result<F::Item, F::Error>) -> FutureValue<B>,     B: Future,

pub fn or_else<G, B>(     self,     g: G ) -> FutureValue<Either<B, OrElse<F, FutureValue<B>, G>>> where     G: FnOnce(F::Error) -> FutureValue<B>,     B: Future<Item = F::Item>,

Trait Implementations

impl<F> VmType for FutureValue<F> where     F: Future,     F::Item: VmType,

type Type = <F::Item as VmType>::Type

A version of Self which implements Any allowing a TypeId to be retrieved

fn make_type(vm: &Thread) -> ArcType

Creates an gluon type which maps to Self in rust

fn extra_args() -> VmIndex

How many extra arguments a function returning this type requires. Used for abstract types which when used in return position should act like they still need more arguments before they are called

fn make_forall_type(vm: &Thread) -> ArcType

impl<'vm, F> AsyncPushable<'vm> for FutureValue<F> where     F: Future<Error = Error> + Send + 'static,     F::Item: Pushable<'vm>,

fn async_push(     self,     thread: &'vm Thread,     context: &mut Context,     lock: Lock ) -> Result<Async<()>>

Pushes self to stack. If the call is successful a single element should have been added to the stack and Ok(()) should be returned. If the call is unsuccessful Status:Error should be returned and the stack should be left intact.

fn async_status_push(     self,     vm: &'vm Thread,     context: &mut Context,     lock: Lock ) -> Status where     Self: Sized,

impl<T, E> From<Result<T, E>> for FutureValue<FutureResult<T, E>>

fn from(result: Result<T, E>) -> FutureValue<FutureResult<T, E>>

Performs the conversion.

impl<F> Future for FutureValue<F> where     F: Future,

type Item = F::Item

The type of value that this future will resolved with if it is successful.

type Error = F::Error

The type of error that this future will resolve with if it fails in a normal fashion.

fn poll(&mut self) -> Poll<F::Item, F::Error>

Query this future to see if its value has become available, registering interest if it is not.

fn wait(self) -> Result<F::Item, F::Error>

Block the current thread until this future is resolved.

fn map<F, U>(self, f: F) -> Map<Self, F> where     F: FnOnce(Self::Item) -> U,

Map this future's result to a different type, returning a new future of the resulting type.

fn map_err<F, E>(self, f: F) -> MapErr<Self, F> where     F: FnOnce(Self::Error) -> E,

Map this future's error to a different error, returning a new future.

fn from_err<E>(self) -> FromErr<Self, E> where     E: From<Self::Error>,

Map this future's error to any error implementing From for this future's Error, returning a new future.

fn then<F, B>(self, f: F) -> Then<Self, B, F> where     B: IntoFuture,     F: FnOnce(Result<Self::Item, Self::Error>) -> B,

Chain on a computation for when a future finished, passing the result of the future to the provided closure f.

fn and_then<F, B>(self, f: F) -> AndThen<Self, B, F> where     B: IntoFuture<Error = Self::Error>,     F: FnOnce(Self::Item) -> B,

Execute another future after this one has resolved successfully.

fn or_else<F, B>(self, f: F) -> OrElse<Self, B, F> where     B: IntoFuture<Item = Self::Item>,     F: FnOnce(Self::Error) -> B,

Execute another future if this one resolves with an error.

fn select<B>(self, other: B) -> Select<Self, <B as IntoFuture>::Future> where     B: IntoFuture<Item = Self::Item, Error = Self::Error>,

Waits for either one of two futures to complete.

fn select2<B>(self, other: B) -> Select2<Self, <B as IntoFuture>::Future> where     B: IntoFuture,

Waits for either one of two differently-typed futures to complete.

fn join<B>(self, other: B) -> Join<Self, <B as IntoFuture>::Future> where     B: IntoFuture<Error = Self::Error>,

Joins the result of two futures, waiting for them both to complete.

fn join3<B, C>(     self,     b: B,     c: C ) -> Join3<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future> where     B: IntoFuture<Error = Self::Error>,     C: IntoFuture<Error = Self::Error>,

Same as join, but with more futures.

fn join4<B, C, D>(     self,     b: B,     c: C,     d: D ) -> Join4<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future, <D as IntoFuture>::Future> where     B: IntoFuture<Error = Self::Error>,     C: IntoFuture<Error = Self::Error>,     D: IntoFuture<Error = Self::Error>,

Same as join, but with more futures.

fn join5<B, C, D, E>(     self,     b: B,     c: C,     d: D,     e: E ) -> Join5<Self, <B as IntoFuture>::Future, <C as IntoFuture>::Future, <D as IntoFuture>::Future, <E as IntoFuture>::Future> where     B: IntoFuture<Error = Self::Error>,     C: IntoFuture<Error = Self::Error>,     D: IntoFuture<Error = Self::Error>,     E: IntoFuture<Error = Self::Error>,

Same as join, but with more futures.

fn into_stream(self) -> IntoStream<Self>

Convert this future into a single element stream.

fn flatten(self) -> Flatten<Self> where     Self::Item: IntoFuture,     <Self::Item as IntoFuture>::Error: From<Self::Error>,

Flatten the execution of this future when the successful result of this future is itself another future.

fn flatten_stream(self) -> FlattenStream<Self> where     Self::Item: Stream,     <Self::Item as Stream>::Error == Self::Error,

Flatten the execution of this future when the successful result of this future is a stream.

fn fuse(self) -> Fuse<Self>

Fuse a future such that poll will never again be called once it has completed.

fn inspect<F>(self, f: F) -> Inspect<Self, F> where     F: FnOnce(&Self::Item),

Do something with the item of a future, passing it on.

fn catch_unwind(self) -> CatchUnwind<Self> where     Self: UnwindSafe,

Catches unwinding panics while polling the future.

fn shared(self) -> Shared<Self>

Create a cloneable handle to this future where all handles will resolve to the same result.