Clippy fixes

examples/benchmark.rs

@@ -46,7 +46,7 @@ fn client(kind: Client) {
                 // print!("(P:{})", result);
                 processed += result
             }
-            Err(err) => panic!("cannot process: {}", err),
+            Err(err) => panic!("cannot process: {err}"),
         }
     }
 

examples/dns.rs

@@ -89,11 +89,11 @@ fn main() {
             .get_query_result(query)
         {
             Ok(addrs) => {
-                println!("Query done: {:?}", addrs);
+                println!("Query done: {addrs:?}");
                 break;
             }
             Err(GetQueryResultError::Pending) => {} // not done yet
-            Err(e) => panic!("query failed: {:?}", e),
+            Err(e) => panic!("query failed: {e:?}"),
         }
 
         phy_wait(fd, iface.poll_delay(timestamp, &sockets)).expect("wait error");

examples/multicast.rs

@@ -83,13 +83,13 @@ fn main() {
             // For display purposes only - normally we wouldn't process incoming IGMP packets
             // in the application layer
             match socket.recv() {
-                Err(e) => println!("Recv IGMP error: {:?}", e),
+                Err(e) => println!("Recv IGMP error: {e:?}"),
                 Ok(buf) => {
                     Ipv4Packet::new_checked(buf)
                         .and_then(|ipv4_packet| IgmpPacket::new_checked(ipv4_packet.payload()))
                         .and_then(|igmp_packet| IgmpRepr::parse(&igmp_packet))
-                        .map(|igmp_repr| println!("IGMP packet: {:?}", igmp_repr))
-                        .unwrap_or_else(|e| println!("parse IGMP error: {:?}", e));
+                        .map(|igmp_repr| println!("IGMP packet: {igmp_repr:?}"))
+                        .unwrap_or_else(|e| println!("parse IGMP error: {e:?}"));
                 }
             }
         }
@@ -105,7 +105,7 @@ fn main() {
                 .map(|(data, sender)| {
                     println!("mDNS traffic: {} UDP bytes from {}", data.len(), sender)
                 })
-                .unwrap_or_else(|e| println!("Recv UDP error: {:?}", e));
+                .unwrap_or_else(|e| println!("Recv UDP error: {e:?}"));
         }
 
         phy_wait(fd, iface.poll_delay(timestamp, &sockets)).expect("wait error");

examples/ping.rs

@@ -247,7 +247,7 @@ fn main() {
             if timestamp - *from < timeout {
                 true
             } else {
-                println!("From {} icmp_seq={} timeout", remote_addr, seq);
+                println!("From {remote_addr} icmp_seq={seq} timeout");
                 false
             }
         });
@@ -269,7 +269,7 @@ fn main() {
         }
     }
 
-    println!("--- {} ping statistics ---", remote_addr);
+    println!("--- {remote_addr} ping statistics ---");
     println!(
         "{} packets transmitted, {} received, {:.0}% packet loss",
         seq_no,

examples/sixlowpan_benchmark.rs

@@ -65,7 +65,7 @@ use std::thread;
 use std::fs;
 
 fn if_nametoindex(ifname: &str) -> u32 {
-    let contents = fs::read_to_string(format!("/sys/devices/virtual/net/{}/ifindex", ifname))
+    let contents = fs::read_to_string(format!("/sys/devices/virtual/net/{ifname}/ifindex"))
         .expect("couldn't read interface from \"/sys/devices/virtual/net\"")
         .replace('\n', "");
     contents.parse::<u32>().unwrap()
@@ -111,7 +111,7 @@ fn client(kind: Client) {
                 // print!("(P:{})", result);
                 processed += result
             }
-            Err(err) => panic!("cannot process: {}", err),
+            Err(err) => panic!("cannot process: {err}"),
         }
     }
 

examples/utils.rs

@@ -26,7 +26,7 @@ where
     Builder::new()
         .format(move |buf, record| {
             let elapsed = since_startup();
-            let timestamp = format!("[{}]", elapsed);
+            let timestamp = format!("[{elapsed}]");
             if record.target().starts_with("smoltcp::") {
                 writeln!(
                     buf,
@@ -73,7 +73,7 @@ pub fn create_options() -> (Options, Vec<&'static str>) {
 pub fn parse_options(options: &Options, free: Vec<&str>) -> Matches {
     match options.parse(env::args().skip(1)) {
         Err(err) => {
-            println!("{}", err);
+            println!("{err}");
             process::exit(1)
         }
         Ok(matches) => {

src/iface/interface/mod.rs

@@ -1630,7 +1630,7 @@ impl<'a> InterfaceInner<'a> {
     #[cfg(any(feature = "medium-ethernet", feature = "medium-ieee802154"))]
     fn check_hardware_addr(addr: &HardwareAddress) {
         if !addr.is_unicast() {
-            panic!("Ethernet address {} is not unicast", addr)
+            panic!("Ethernet address {addr} is not unicast")
         }
     }
 

src/wire/icmpv6.rs

@@ -418,7 +418,7 @@ impl<T: AsRef<[u8]> + AsMut<[u8]>> Packet<T> {
                 let data = self.buffer.as_mut();
                 NetworkEndian::write_u16(&mut data[field::RECORD_RESV], 0);
             }
-            ty => panic!("Message type `{}` does not have any reserved fields.", ty),
+            ty => panic!("Message type `{ty}` does not have any reserved fields."),
         }
     }
 

src/wire/ieee802154.rs

@@ -872,7 +872,7 @@ mod test {
         let mut frame = Frame::new_unchecked(&mut buffer[..buffer_len]);
         repr.emit(&mut frame);
 
-        println!("{:2x?}", frame);
+        println!("{frame:2x?}");
 
         assert_eq!(frame.frame_type(), FrameType::Data);
         assert!(!frame.security_enabled());

src/wire/ip.rs

@@ -591,7 +591,7 @@ impl Repr {
                 hop_limit,
             }),
             #[allow(unreachable_patterns)]
-            _ => panic!("IP version mismatch: src={:?} dst={:?}", src_addr, dst_addr),
+            _ => panic!("IP version mismatch: src={src_addr:?} dst={dst_addr:?}"),
         }
     }
 
@@ -783,10 +783,7 @@ pub mod checksum {
             }
 
             #[allow(unreachable_patterns)]
-            _ => panic!(
-                "Unexpected pseudo header addresses: {}, {}",
-                src_addr, dst_addr
-            ),
+            _ => panic!("Unexpected pseudo header addresses: {src_addr}, {dst_addr}"),
         }
     }
 

src/wire/ipv6.rs

@@ -787,7 +787,7 @@ mod test {
     #[test]
     fn test_address_format() {
         assert_eq!("ff02::1", format!("{}", Address::LINK_LOCAL_ALL_NODES));
-        assert_eq!("fe80::1", format!("{}", LINK_LOCAL_ADDR));
+        assert_eq!("fe80::1", format!("{LINK_LOCAL_ADDR}"));
         assert_eq!(
             "fe80::7f00:0:1",
             format!(

src/wire/ipv6option.rs

@@ -534,7 +534,7 @@ mod test {
                     }),
                 ) => continue,
                 (6, Err(Error)) => continue,
-                (i, res) => panic!("Unexpected option `{:?}` at index {}", res, i),
+                (i, res) => panic!("Unexpected option `{res:?}` at index {i}"),
             }
         }
     }

utils/packet2pcap.rs

@@ -24,7 +24,7 @@ fn convert(
 }
 
 fn print_usage(program: &str, opts: Options) {
-    let brief = format!("Usage: {} [options] INPUT OUTPUT", program);
+    let brief = format!("Usage: {program} [options] INPUT OUTPUT");
     print!("{}", opts.usage(&brief));
 }
 
@@ -44,7 +44,7 @@ fn main() {
     let matches = match opts.parse(&args[1..]) {
         Ok(m) => m,
         Err(e) => {
-            eprintln!("{}", e);
+            eprintln!("{e}");
             return;
         }
     };
@@ -67,7 +67,7 @@ fn main() {
     ) {
         Ok(()) => (),
         Err(e) => {
-            eprintln!("Cannot convert packet to pcap: {}", e);
+            eprintln!("Cannot convert packet to pcap: {e}");
             exit(1);
         }
     }