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fn assert_is_object_safe<T>() {}
#[test]
fn future() {
// `FutureExt`, `TryFutureExt` and `UnsafeFutureObj` are not object safe.
use futures::future::{FusedFuture, Future, TryFuture};
assert_is_object_safe::<&dyn Future<Output = ()>>();
assert_is_object_safe::<&dyn FusedFuture<Output = ()>>();
assert_is_object_safe::<&dyn TryFuture<Ok = (), Error = (), Output = Result<(), ()>>>();
}
#[test]
fn stream() {
// `StreamExt` and `TryStreamExt` are not object safe.
use futures::stream::{FusedStream, Stream, TryStream};
assert_is_object_safe::<&dyn Stream<Item = ()>>();
assert_is_object_safe::<&dyn FusedStream<Item = ()>>();
assert_is_object_safe::<&dyn TryStream<Ok = (), Error = (), Item = Result<(), ()>>>();
}
#[test]
fn sink() {
// `SinkExt` is not object safe.
use futures::sink::Sink;
assert_is_object_safe::<&dyn Sink<(), Error = ()>>();
}
#[cfg(feature = "std")] // futures::io
#[test]
fn io() {
// `AsyncReadExt`, `AsyncWriteExt`, `AsyncSeekExt` and `AsyncBufReadExt` are not object safe.
use futures::io::{AsyncBufRead, AsyncRead, AsyncSeek, AsyncWrite};
assert_is_object_safe::<&dyn AsyncRead>();
assert_is_object_safe::<&dyn AsyncWrite>();
assert_is_object_safe::<&dyn AsyncSeek>();
assert_is_object_safe::<&dyn AsyncBufRead>();
}
#[test]
fn task() {
// `ArcWake`, `SpawnExt` and `LocalSpawnExt` are not object safe.
use futures::task::{LocalSpawn, Spawn};
assert_is_object_safe::<&dyn Spawn>();
assert_is_object_safe::<&dyn LocalSpawn>();
}
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