Add async_closure feature gate where needed

Author: spastorino

.travis.yml

@@ -1,5 +1,5 @@
 language: rust
-rust: nightly-2019-06-02
+rust: nightly-2019-07-08
 cache: cargo
 
 before_script:

examples/cors.rs

@@ -1,4 +1,4 @@
-#![feature(async_await)]
+#![feature(async_await, async_closure)]
 
 use http::header::HeaderValue;
 use tide::middleware::CorsMiddleware;

examples/default_headers.rs

@@ -1,4 +1,4 @@
-#![feature(async_await)]
+#![feature(async_await, async_closure)]
 
 use tide::middleware::DefaultHeaders;
 

examples/hello.rs

@@ -1,4 +1,4 @@
-#![feature(async_await)]
+#![feature(async_await, async_closure)]
 fn main() {
     let mut app = tide::App::new();
     app.at("/").get(async move |_| "Hello, world!");

examples/hello_envlog.rs

@@ -1,4 +1,4 @@
-#![feature(async_await)]
+#![feature(async_await, async_closure)]
 fn main() {
     env_logger::from_env(env_logger::Env::default().default_filter_or("info")).init();
     let mut app = tide::App::new();

examples/hello_logrs.rs

@@ -1,4 +1,4 @@
-#![feature(async_await)]
+#![feature(async_await, async_closure)]
 fn main() {
     use log::LevelFilter;
     use log4rs::append::console::ConsoleAppender;

examples/messages.rs

@@ -51,7 +51,7 @@ async fn set_message(mut cx: Context<Database>) -> EndpointResult<()> {
     if cx.state().set(id, msg) {
         Ok(())
     } else {
-        Err(StatusCode::NOT_FOUND)?
+        Err(StatusCode::NOT_FOUND.into())
     }
 }
 
@@ -60,7 +60,7 @@ async fn get_message(cx: Context<Database>) -> EndpointResult {
     if let Some(msg) = cx.state().get(id) {
         Ok(response::json(msg))
     } else {
-        Err(StatusCode::NOT_FOUND)?
+        Err(StatusCode::NOT_FOUND.into())
     }
 }
 

examples/runtime.rs

@@ -1,4 +1,4 @@
-#![feature(async_await)]
+#![feature(async_await, async_closure)]
 
 /// An example of how to run a Tide service on top of `runtime`, this also shows the pieces
 /// necessary if you wish to run a service on some other executor/IO source.

src/app.rs

@@ -30,7 +30,7 @@ use crate::{
 /// on `127.0.0.1:8000` with:
 ///
 /// ```rust, no_run
-/// #![feature(async_await)]
+/// #![feature(async_await, async_closure)]
 ///
 /// let mut app = tide::App::new();
 /// app.at("/hello").get(async move |_| "Hello, world!");
@@ -45,7 +45,7 @@ use crate::{
 /// segments as parameters to endpoints:
 ///
 /// ```rust, no_run
-/// #![feature(async_await)]
+/// #![feature(async_await, async_closure)]
 ///
 /// use tide::error::ResultExt;
 ///
@@ -166,7 +166,7 @@ impl<State: Send + Sync + 'static> App<State> {
     /// respective endpoint of the selected resource. Example:
     ///
     /// ```rust,no_run
-    /// # #![feature(async_await)]
+    /// # #![feature(async_await, async_closure)]
     /// # let mut app = tide::App::new();
     /// app.at("/").get(async move |_| "Hello, world!");
     /// ```

src/lib.rs

@@ -4,7 +4,7 @@
 
 #![cfg_attr(any(feature = "nightly", test), feature(external_doc))]
 #![cfg_attr(feature = "nightly", doc(include = "../README.md"))]
-#![feature(async_await, existential_type)]
+#![feature(async_await, async_closure, existential_type)]
 #![warn(
     nonstandard_style,
     rust_2018_idioms,