Remove CommandError::as_str method

AsStr is automatically implementeded if Display is implemented, so
having a manual as_str() method is not necessary.

1 files changed, 16 insertions, 24 deletions

diff --git a/src/error.rs b/src/error.rs
index a2b3848..1aaf21f 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -1,4 +1,3 @@
-use std::borrow;
 use std::error;
 use std::fmt;
 use std::os::raw;
@@ -128,35 +127,28 @@ impl CommandError {
             _ => None,
         }
     }
-
-    fn as_str(&self) -> borrow::Cow<'static, str> {
-        match *self {
-            CommandError::WrongCrc => {
-                "A packet with a wrong checksum has been sent or received".into()
-            }
-            CommandError::WrongSlot => "The given OTP slot does not exist".into(),
-            CommandError::SlotNotProgrammed => "The given OTP slot is not programmed".into(),
-            CommandError::WrongPassword => "The given password is wrong".into(),
-            CommandError::NotAuthorized => {
-                "You are not authorized for this command or provided a wrong temporary \
-                 password"
-                    .into()
-            }
-            CommandError::Timestamp => "An error occurred when getting or setting the time".into(),
-            CommandError::NoName => "You did not provide a name for the OTP slot".into(),
-            CommandError::NotSupported => "This command is not supported by this device".into(),
-            CommandError::UnknownCommand => "This command is unknown".into(),
-            CommandError::AesDecryptionFailed => "AES decryption failed".into(),
-            CommandError::Undefined => "An unspecified error occurred".into(),
-        }
-    }
 }
 
 impl error::Error for CommandError {}
 
 impl fmt::Display for CommandError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}", self.as_str())
+        f.write_str(match *self {
+            CommandError::WrongCrc => "A packet with a wrong checksum has been sent or received",
+            CommandError::WrongSlot => "The given OTP slot does not exist",
+            CommandError::SlotNotProgrammed => "The given OTP slot is not programmed",
+            CommandError::WrongPassword => "The given password is wrong",
+            CommandError::NotAuthorized => {
+                "You are not authorized for this command or provided a wrong temporary \
+                 password"
+            }
+            CommandError::Timestamp => "An error occurred when getting or setting the time",
+            CommandError::NoName => "You did not provide a name for the OTP slot",
+            CommandError::NotSupported => "This command is not supported by this device",
+            CommandError::UnknownCommand => "This command is unknown",
+            CommandError::AesDecryptionFailed => "AES decryption failed",
+            CommandError::Undefined => "An unspecified error occurred",
+        })
     }
 }