fix clippy

Author: sfackler

Cargo.toml

@@ -6,6 +6,7 @@ license = "MIT OR Apache-2.0"
 description = "A wrapper over a platform's native TLS implementation"
 repository = "https://github.com/sfackler/rust-native-tls"
 readme = "README.md"
+rust-version = "1.53.0"
 
 [package.metadata.docs.rs]
 features = ["alpn"]

src/imp/openssl.rs

@@ -32,7 +32,6 @@ fn supported_protocols(
             Protocol::Tlsv10 => SslVersion::TLS1,
             Protocol::Tlsv11 => SslVersion::TLS1_1,
             Protocol::Tlsv12 => SslVersion::TLS1_2,
-            Protocol::__NonExhaustive => unreachable!(),
         }
     }
 
@@ -71,7 +70,6 @@ fn supported_protocols(
                 | SslOptions::NO_TLSV1
                 | SslOptions::NO_TLSV1_1
         }
-        Some(Protocol::__NonExhaustive) => unreachable!(),
     };
     options |= match max {
         None | Some(Protocol::Tlsv12) => SslOptions::empty(),
@@ -80,7 +78,6 @@ fn supported_protocols(
         Some(Protocol::Sslv3) => {
             SslOptions::NO_TLSV1 | SslOptions::NO_TLSV1_1 | SslOptions::NO_TLSV1_2
         }
-        Some(Protocol::__NonExhaustive) => unreachable!(),
     };
 
     ctx.set_options(options);

src/imp/security_framework.rs

@@ -48,7 +48,6 @@ fn convert_protocol(protocol: Protocol) -> SslProtocol {
         Protocol::Tlsv10 => SslProtocol::TLS1,
         Protocol::Tlsv11 => SslProtocol::TLS11,
         Protocol::Tlsv12 => SslProtocol::TLS12,
-        Protocol::__NonExhaustive => unreachable!(),
     }
 }
 

src/lib.rs

@@ -311,6 +311,7 @@ impl<S> From<imp::HandshakeError<S>> for HandshakeError<S> {
 
 /// SSL/TLS protocol versions.
 #[derive(Debug, Copy, Clone)]
+#[non_exhaustive]
 pub enum Protocol {
     /// The SSL 3.0 protocol.
     ///
@@ -325,8 +326,6 @@ pub enum Protocol {
     Tlsv11,
     /// The TLS 1.2 protocol.
     Tlsv12,
-    #[doc(hidden)]
-    __NonExhaustive,
 }
 
 /// A builder for `TlsConnector`s.

src/test.rs

@@ -141,7 +141,7 @@ fn certificate_from_pem() {
     let keys = test_cert_gen::keys();
 
     let der_path = dir.path().join("cert.der");
-    fs::write(&der_path, &keys.client.ca.get_der()).unwrap();
+    fs::write(&der_path, keys.client.ca.get_der()).unwrap();
     let output = Command::new("openssl")
         .arg("x509")
         .arg("-in")