Add feature flag for defmt derives for errors

Cargo.toml

@@ -28,11 +28,13 @@ edition = "2021"
 [features]
 default = ["std", "derive"]
 std = ["alloc", "serde?/std"]
-alloc = ["serde?/alloc"]
+alloc = ["serde?/alloc", "defmt?/alloc"]
 derive = ["bincode_derive"]
+defmt = ["dep:defmt"]
 
 [dependencies]
 bincode_derive = { path = "derive", version = "2.0.1", optional = true }
+defmt = {version = "1.0.1", optional = true}
 serde = { version = "1.0", default-features = false, optional = true }
 unty = "0.0.4"
 

src/error.rs

@@ -3,6 +3,7 @@
 /// Errors that can be encountered by encoding a type
 #[non_exhaustive]
 #[derive(Debug)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum EncodeError {
     /// The writer ran out of storage.
     UnexpectedEnd,
@@ -30,6 +31,7 @@
     #[cfg(feature = "std")]
     Io {
         /// The encountered error
+        #[cfg_attr(feature = "defmt", defmt(Debug2Format))]
         inner: std::io::Error,
         /// The amount of bytes that were written before the error occurred
         index: usize,
@@ -46,8 +48,10 @@
     #[cfg(feature = "std")]
     InvalidSystemTime {
         /// The error that was thrown by the SystemTime
+        #[cfg_attr(feature = "defmt", defmt(Debug2Format))]
         inner: std::time::SystemTimeError,
         /// The SystemTime that caused the error
+        #[cfg_attr(feature = "defmt", defmt(Debug2Format))]
         time: std::boxed::Box<std::time::SystemTime>,
     },
 
@@ -65,6 +69,7 @@
 
 /// Errors that can be encountered by decoding a type
 #[non_exhaustive]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 #[derive(Debug)]
 pub enum DecodeError {
     /// The reader reached its end but more bytes were expected.
@@ -109,6 +114,7 @@
     /// The decoder tried to decode a `str`, but an utf8 error was encountered.
     Utf8 {
         /// The inner error
+        #[cfg_attr(feature = "defmt", defmt(Debug2Format))]
         inner: core::str::Utf8Error,
     },
 
@@ -168,6 +174,7 @@
     #[cfg(feature = "std")]
     Io {
         /// The IO error expected
+        #[cfg_attr(feature = "defmt", defmt(Debug2Format))]
         inner: std::io::Error,
 
         /// Gives an estimate of how many extra bytes are needed.
@@ -217,6 +224,7 @@
 /// Indicates which enum variants are allowed
 #[non_exhaustive]
 #[derive(Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum AllowedEnumVariants {
     /// All values between `min` and `max` (inclusive) are allowed
     #[allow(missing_docs)]
@@ -229,6 +237,7 @@
 #[non_exhaustive]
 #[derive(Debug, PartialEq, Eq)]
 #[allow(missing_docs)]
+#[cfg_attr(feature = "defmt", derive(defmt::Format))]
 pub enum IntegerType {
     U8,
     U16,