Fix wasm build (#96)

* Fix errors and warnings for wasm build

* Add CI build for wasm

Author: Nemo157

azure-pipelines.yml

@@ -18,6 +18,19 @@ jobs:
           export RUST_BACKTRACE=1
           cargo test --all || exit
         displayName: "Run cargo test"
+  - job: wasm
+    pool:
+      vmImage: 'ubuntu-16.04'
+    displayName: "build --target wasm32-unknown-unknown"
+    steps:
+      - template: ci/install-rust.yml
+        parameters:
+          rust_version: nightly
+      - bash: |
+          export RUST_BACKTRACE=1
+          rustup target add wasm32-unknown-unknown
+          cargo build --target wasm32-unknown-unknown
+        displayName: "Run cargo build --target wasm32-unknown-unknown"
   - job: check_benches
     pool:
       vmImage: 'ubuntu-16.04'

runtime-native/src/lib.rs

@@ -9,12 +9,12 @@
     rust_2018_idioms
 )]
 
-#[cfg(all(feature = "wasm-bindgen", target_arch = "wasm32"))]
+#[cfg(target_arch = "wasm32")]
 mod wasm32;
-#[cfg(all(feature = "wasm-bindgen", target_arch = "wasm32"))]
+#[cfg(target_arch = "wasm32")]
 pub use wasm32::Native;
 
-#[cfg(not(all(feature = "wasm-bindgen", target_arch = "wasm32")))]
+#[cfg(not(target_arch = "wasm32"))]
 mod not_wasm32;
-#[cfg(not(all(feature = "wasm-bindgen", target_arch = "wasm32")))]
+#[cfg(not(target_arch = "wasm32"))]
 pub use not_wasm32::Native;

runtime-native/src/wasm32.rs

@@ -7,16 +7,12 @@ use std::net::SocketAddr;
 use std::pin::Pin;
 use std::time::{Duration, Instant};
 
-use wasm_bindgen::prelude::*;
-use wasm_bindgen_futures::future_to_promise;
-
 /// The Native runtime.
 #[derive(Debug)]
 pub struct Native;
 
 impl runtime_raw::Runtime for Native {
     fn spawn_boxed(&self, fut: BoxFuture<'static, ()>) -> Result<(), SpawnError> {
-        use futures01::future::Future;
         let fut = fut.unit_error().compat();
         wasm_bindgen_futures::spawn_local(fut);
         Ok(())