tag futures as must use

sfackler · sfackler · commit aa0fca4929cf · 2018-06-19T19:54:29.000-04:00
diff --git a/tokio-postgres/src/lib.rs b/tokio-postgres/src/lib.rs
@@ -70,6 +70,7 @@ impl Client {
     }
 }
 
+#[must_use = "futures do nothing unless polled"]
 pub struct Connection(proto::Connection);
 
 impl Connection {
@@ -91,6 +92,7 @@ impl Future for Connection {
     }
 }
 
+#[must_use = "futures do nothing unless polled"]
 pub struct Handshake(proto::HandshakeFuture);
 
 impl Future for Handshake {
@@ -104,6 +106,7 @@ impl Future for Handshake {
     }
 }
 
+#[must_use = "futures do nothing unless polled"]
 pub struct Prepare(proto::PrepareFuture);
 
 impl Future for Prepare {

Original file line number	Diff line number	Diff line change
`@@ -70,6 +70,7 @@ impl Client {`
`70`	`70`	`}`
`71`	`71`	`}`
`72`	`72`
	`73`	`+#[must_use = "futures do nothing unless polled"]`
`73`	`74`	`pub struct Connection(proto::Connection);`
`74`	`75`
`75`	`76`	`impl Connection {`
`@@ -91,6 +92,7 @@ impl Future for Connection {`
`91`	`92`	`}`
`92`	`93`	`}`
`93`	`94`
	`95`	`+#[must_use = "futures do nothing unless polled"]`
`94`	`96`	`pub struct Handshake(proto::HandshakeFuture);`
`95`	`97`
`96`	`98`	`impl Future for Handshake {`
`@@ -104,6 +106,7 @@ impl Future for Handshake {`
`104`	`106`	`}`
`105`	`107`	`}`
`106`	`108`
	`109`	`+#[must_use = "futures do nothing unless polled"]`
`107`	`110`	`pub struct Prepare(proto::PrepareFuture);`
`108`	`111`
`109`	`112`	`impl Future for Prepare {`