matthauck · March 23, 2020 18:55 · Mar 23, 2020
diff --git a/Cargo.toml b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "async-trait-75"
+version = "0.1.0"
+authors = []
+edition = "2018"
+
+[dependencies]
+async-trait = "0.1.17"
+tokio = { version = "0.2.13", features = [ "rt-threaded", "macros" ] }
diff --git a/output.txt b/output.txt
@@ -0,0 +1,12 @@
+$ cargo build
+   Compiling async-trait-75 v0.1.0 (/Users/user/async-trait-test)
+warning: unused implementer of `std::future::Future` that must be used
+  --> src/main.rs:26:5
+   |
+26 |     thing.do_direct();
+   |     ^^^^^^^^^^^^^^^^^^
+   |
+   = note: `#[warn(unused_must_use)]` on by default
+   = note: futures do nothing unless you `.await` or poll them
+
+    Finished dev [unoptimized + debuginfo] target(s) in 1.35s
diff --git a/src_main.rs b/src_main.rs
@@ -0,0 +1,27 @@
+#[async_trait::async_trait]
+trait Interface {
+    async fn do_trait(&self);
+}
+
+struct Thing;
+
+#[async_trait::async_trait]
+impl Interface for Thing {
+    async fn do_trait(&self) {
+        println!("hello from trait");
+    }
+}
+
+impl Thing {
+    async fn do_direct(&self) {
+        println!("hello from direct");
+    }
+}
+
+#[tokio::main]
+async fn main() {
+    let thing = Thing {};
+
+    thing.do_trait();
+    thing.do_direct();
+}