Added thiserror derives

src/error.rs

@@ -1,9 +1,13 @@
+use thiserror::Error;
+
 /// Indicates the transducer value is known to be impossible.
-#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Error)]
+#[error("invalid value")]
 pub struct InvalidValue;
 
 /// Indicates that the encoded data is not valid for the type.
-#[derive(Copy, Clone, Debug, Eq, PartialEq)]
+#[derive(Copy, Clone, Debug, Eq, PartialEq, Error)]
+#[error("invalid encoding")]
 pub struct InvalidEncoding;
 /// An error that it is likely impossible to recover from. This error should only be created in
 /// situations where attempts to recover have already been attempted and have failed. Error handling
@@ -12,11 +16,13 @@ pub struct InvalidEncoding;
 ///
 /// In many systems there can be a single function for handling any critical error as a critical
 /// error always means everything needs to be stopped.
-#[derive(Copy, Clone, Eq, PartialEq, Debug)]
+#[derive(Copy, Clone, Eq, PartialEq, Debug, Error)]
 pub enum CriticalError {
     /// Critical communication failed and retries are either impossible or also failed.
+    #[error("critical communication failure")]
     Communication,
-    InvalidValue(InvalidValue),
+    #[error(transparent)]
+    InvalidValue(#[from] InvalidValue),
 }
 
 /// A state of this type may mean the program has encountered an error that prevents it from continuing to run