revert displaydoc removal

Author: raphaelrobert

Cargo.toml

@@ -27,6 +27,7 @@ curve25519-dalek = { version = "4", default-features = false, features = [
 ], optional = true }
 derive-where = { version = "1", features = ["zeroize-on-drop"] }
 digest = "0.10"
+displaydoc = { version = "0.2", default-features = false }
 elliptic-curve = { version = "0.13", features = [
   "hash2curve",
   "sec1",

src/error.rs

@@ -12,7 +12,7 @@
 pub type Result<T, E = Error> = core::result::Result<T, E>;
 
 /// Represents an error in the manipulation of internal cryptographic data
-#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+#[derive(Clone, Copy, Debug, displaydoc::Display, Eq, Hash, Ord, PartialEq, PartialOrd)]
 pub enum Error {
     /// Size of info is longer then [`u16::MAX`].
     Info,
@@ -40,19 +40,3 @@ pub enum InternalError {
 }
 
 impl core::error::Error for Error {}
-
-impl core::fmt::Display for Error {
-    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
-        let message = match self {
-            Self::Info => "Size of info is longer then u16::MAX.",
-            Self::Input => "Size of input is empty or longer then u16::MAX.",
-            Self::DeriveKeyPair => "Size of info and seed together are longer then u16::MAX - 3.",
-            Self::Deserialization => "Failure to deserialize bytes.",
-            Self::Batch => "Batched items are more then u16::MAX or length don't match.",
-            Self::ProofVerification => "In verifiable mode, occurs when the proof failed to verify.",
-            Self::Protocol => "The protocol has failed and can't be completed.",
-        };
-
-        f.write_str(message)
-    }
-}