Merge pull request #100 from teloxide/new_fmt

Fixes of build on CI (fmt, never-ty)

.github/workflows/ci.yml

@@ -52,6 +52,7 @@ jobs:
 
       - name: fmt
         uses: actions-rs/cargo@v1
+        if: matrix.rust == 'nightly'
         with:
           command: fmt
           args: --all -- --check

Cargo.toml

@@ -23,4 +23,3 @@ serde_with_macros = "1.0.1"
 default = []
 
 unstable-stream = [] # add streams to public API
-never-type = [] # add never type (`!`) to punlic API

src/dispatching/dispatchers/filter/error_policy.rs

@@ -1,6 +1,5 @@
-#[cfg(not(feature = "never-type"))]
-use std::convert::Infallible;
-use std::{future::Future, pin::Pin};
+// Infallible used here instead of `!` to be compatible with rust <1.41
+use std::{convert::Infallible, future::Future, pin::Pin};
 
 use async_trait::async_trait;
 
@@ -73,28 +72,10 @@ where
 /// IgnoreSafe.handle_error(0);
 /// ```
 ///
-/// ## Note
-/// Never type is not stabilized yet (see [`#35121`]) so all API that uses [`!`]
-/// (including `impl ErrorPolicy<!> for IgnoreSafe`) we hide under the
-/// `never-type` cargo feature.
-///
 /// [`!`]: https://doc.rust-lang.org/std/primitive.never.html
 /// [`Infallible`]: std::convert::Infallible
-/// [`#35121`]: https://github.com/rust-lang/rust/issues/35121
 pub struct IgnoreSafe;
 
-#[cfg(feature = "never-type")]
-#[allow(unreachable_code)]
-#[async_trait]
-impl ErrorPolicy<!> for IgnoreSafe {
-    async fn handle_error(&self, _: !)
-    where
-        !: 'async_trait,
-    {
-    }
-}
-
-#[cfg(not(feature = "never-type"))]
 #[allow(unreachable_code)]
 #[async_trait]
 impl ErrorPolicy<Infallible> for IgnoreSafe {

src/dispatching/dispatchers/filter/mod.rs

@@ -75,8 +75,8 @@ type FiltersAndHandlers<'a, T, E> = Vec<FilterAndHandler<'a, T, E>>;
 /// // with error policy that just ignores all errors (that can't ever happen)
 /// let mut dp = FilterDispatcher::<Infallible, _>::new(|_| async {})
 ///     // Add 'handler' that will handle all messages sent to the bot
-///     .message_handler(true, |mes: Message| {
-///         async move { println!("New message: {:?}", mes) }
+///     .message_handler(true, |mes: Message| async move {
+///         println!("New message: {:?}", mes)
 ///     })
 ///     // Add 'handler' that will handle all
 ///     // messages edited in chat with the bot
@@ -318,16 +318,12 @@ mod tests {
         let counter2 = &AtomicI32::new(0);
 
         let mut dp = FilterDispatcher::<Infallible, _>::new(|_| async {})
-            .message_handler(true, |_mes: Message| {
-                async move {
-                    counter.fetch_add(1, Ordering::SeqCst);
-                }
+            .message_handler(true, |_mes: Message| async move {
+                counter.fetch_add(1, Ordering::SeqCst);
             })
-            .message_handler(true, |_mes: Message| {
-                async move {
-                    counter2.fetch_add(1, Ordering::SeqCst);
-                    Ok::<_, Infallible>(())
-                }
+            .message_handler(true, |_mes: Message| async move {
+                counter2.fetch_add(1, Ordering::SeqCst);
+                Ok::<_, Infallible>(())
             });
 
         dp.dispatch(one_message_updater()).await;

src/dispatching/updater.rs

@@ -136,19 +136,17 @@ where
 }
 
 pub fn polling<'a>(bot: &'a Bot) -> impl Updater<Error = RequestError> + 'a {
-    let stream = stream::unfold((bot, 0), |(bot, mut offset)| {
-        async move {
-            let updates = match bot.get_updates().offset(offset).send().await {
-                Ok(updates) => {
-                    if let Some(upd) = updates.last() {
-                        offset = upd.id + 1;
-                    }
-                    updates.into_iter().map(Ok).collect::<Vec<_>>()
+    let stream = stream::unfold((bot, 0), |(bot, mut offset)| async move {
+        let updates = match bot.get_updates().offset(offset).send().await {
+            Ok(updates) => {
+                if let Some(upd) = updates.last() {
+                    offset = upd.id + 1;
                 }
-                Err(err) => vec![Err(err)],
-            };
-            Some((stream::iter(updates), (bot, offset)))
-        }
+                updates.into_iter().map(Ok).collect::<Vec<_>>()
+            }
+            Err(err) => vec![Err(err)],
+        };
+        Some((stream::iter(updates), (bot, offset)))
     })
     .flatten();
 

src/network/download.rs

@@ -42,13 +42,11 @@ pub async fn download_file_stream(
         .await?
         .error_for_status()?;
 
-    Ok(futures::stream::unfold(res, |mut res| {
-        async {
-            match res.chunk().await {
-                Err(err) => Some((Err(err), res)),
-                Ok(Some(c)) => Some((Ok(c), res)),
-                Ok(None) => None,
-            }
+    Ok(futures::stream::unfold(res, |mut res| async {
+        match res.chunk().await {
+            Err(err) => Some((Err(err), res)),
+            Ok(Some(c)) => Some((Ok(c), res)),
+            Ok(None) => None,
         }
     }))
 }