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  1. 18
      cargo.out
  2. 6
      src/main.rs

18
cargo.out

@ -1,22 +1,22 @@
Compiling futuretest v0.1.0 (file:///mnt/c/Users/Mahmoud/git/futuretest)
error[E0271]: type mismatch resolving `<futures::FutureResult<(), std::string::String> as futures::IntoFuture>::Error == &str`
--> src/main.rs:13:10
--> src/main.rs:12:10
|
13 | .and_then(|_|
12 | .and_then(|_|
| ^^^^^^^^ expected struct `std::string::String`, found &str
|
= note: expected type `std::string::String`
found type `&str`
error[E0271]: type mismatch resolving `<futures::FutureResult<(), std::string::String> as futures::IntoFuture>::Error == &str`
--> src/main.rs:20:10
error[E0599]: no method named `and_then` found for type `futures::AndThen<futures::MapErr<futures::FutureResult<(), ()>, [closure@src/main.rs:11:18: 11:42]>, futures::FutureResult<(), std::string::String>, [closure@src/main.rs:12:19: 15:14]>` in the current scope
--> src/main.rs:17:10
|
20 | core.run(f).unwrap();
| ^^^ expected struct `std::string::String`, found &str
17 | .and_then(|_| future::result::<(), String>(Err("another &'static str error".to_owned())))
| ^^^^^^^^
|
= note: expected type `std::string::String`
found type `&str`
= note: required because of the requirements on the impl of `futures::Future` for `futures::AndThen<futures::Map<futures::MapErr<futures::FutureResult<(), ()>, [closure@src/main.rs:11:18: 11:43]>, [closure@src/main.rs:12:14: 12:67]>, futures::FutureResult<(), std::string::String>, [closure@src/main.rs:13:19: 16:14]>`
= note: the method `and_then` exists but the following trait bounds were not satisfied:
`futures::AndThen<futures::MapErr<futures::FutureResult<(), ()>, [closure@src/main.rs:11:18: 11:42]>, futures::FutureResult<(), std::string::String>, [closure@src/main.rs:12:19: 15:14]> : futures::Future`
`&mut futures::AndThen<futures::MapErr<futures::FutureResult<(), ()>, [closure@src/main.rs:11:18: 11:42]>, futures::FutureResult<(), std::string::String>, [closure@src/main.rs:12:19: 15:14]> : futures::Future`
error: aborting due to 2 previous errors

6
src/main.rs

@ -7,14 +7,14 @@ use tokio_core::reactor::Core;
fn main() {
let mut core = Core::new().expect("Failed to initialize tokio_core reactor!");
let f = future::result(Ok(()))
.map_err(|()| "&'static str error")
.map(|_| future::result(Err("another &'static str error")))
let f = future::result::<(),()>(Ok(()))
.map_err(|_| "&'static str error")
.and_then(|_|
future::result(Ok(())
.map_err(|()| "String error".to_owned())
)
)
.and_then(|_| future::result::<(), String>(Err("another &'static str error".to_owned())))
;
core.run(f).unwrap();

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