Ch. 17 §03: restore accidentally-removed Listing 17-14

listings/ch17-async-await/listing-17-14/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "async_await"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+trpl = { path = "../../../packages/trpl" }

listings/ch17-async-await/listing-17-14/src/main.rs

@@ -0,0 +1,48 @@
+use std::time::Duration;
+
+fn main() {
+    trpl::block_on(async {
+        let (tx, mut rx) = trpl::channel();
+
+        let tx1 = tx.clone();
+        let tx1_fut = async move {
+            let vals = vec![
+                String::from("hi"),
+                String::from("from"),
+                String::from("the"),
+                String::from("future"),
+            ];
+
+            for val in vals {
+                tx1.send(val).unwrap();
+                trpl::sleep(Duration::from_secs(1)).await;
+            }
+        };
+
+        let rx_fut = async {
+            while let Some(value) = rx.recv().await {
+                println!("received '{value}'");
+            }
+        };
+
+        let tx_fut = async move {
+            let vals = vec![
+                String::from("more"),
+                String::from("messages"),
+                String::from("for"),
+                String::from("you"),
+            ];
+
+            for val in vals {
+                tx.send(val).unwrap();
+                trpl::sleep(Duration::from_secs(1)).await;
+            }
+        };
+
+        // ANCHOR: here
+        let futures = vec![tx1_fut, rx_fut, tx_fut];
+
+        trpl::join_all(futures).await;
+        // ANCHOR_END: here
+    });
+}

src/ch17-03-more-futures.md

@@ -25,7 +25,7 @@ To check all the futures in some collection, we will need to iterate over and
 join on *all* of them. The `trpl::join_all` function accepts any type which
 implements the `Iterator` trait, which we learned about back in Chapter 13, so
 it seems like just the ticket. Let’s try putting our futures in a vector, and
-replace `join3` with `join_all`.
+replace `join!` with `join_all`.
 
 <Listing  number="17-14" caption="Storing anonymous futures in a vector and calling `join_all`">
 
@@ -39,7 +39,6 @@ Unfortunately, this does not compile. Instead, we get this error:
 
 <!-- manual-regeneration
 cd listings/ch17-async-await/listing-17-14/
-cargo clean
 cargo build
 copy just the compiler error, and *add* the following text (correctly aligned),
 to match the nicer version we will have starting in 1.81