Add Stream::size_hint #1853
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Add Stream::size_hint #1853
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taiki-e
commented
Sep 1, 2019
| @@ -126,7 +165,7 @@ mod private_try_stream { | |||
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| /// A convenience for streams that return `Result` values that includes | |||
| /// a variety of adapters tailored to such futures. | |||
| pub trait TryStream: private_try_stream::Sealed { | |||
| pub trait TryStream: Stream + private_try_stream::Sealed { | |||
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Added this bound because it would be convenient if stream.size_hint() could be called on St: TryStream.
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oh...
error[E0191]: the value of the associated type `Item` (from the trait `futures_core::stream::Stream`) must be specified
--> futures/tests/object_safety.rs:20:30
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20 | assert_is_object_safe::<&dyn TryStream<Ok = (), Error = ()>>();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ associated type `Item` must be specified
taiki-e
commented
Sep 1, 2019
| @@ -57,7 +57,7 @@ mod private_try_future { | |||
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| /// A convenience for futures that return `Result` values that includes | |||
| /// a variety of adapters tailored to such futures. | |||
| pub trait TryFuture: private_try_future::Sealed { | |||
| pub trait TryFuture: Future + private_try_future::Sealed { | |||
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Added for consistency with TryStream.
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yoshuawuyts
approved these changes
Sep 1, 2019
|
Nice! Seems like a good easy add. |
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Closes #170
r? @cramertj
cc @Nemo157 @seanmonstar @carllerche @LucioFranco @yoshuawuyts