Add defmt::Format bound to error types

Author: JalonWong

embedded-can/src/blocking.rs

@@ -6,6 +6,10 @@ pub trait Can {
     type Frame: crate::Frame;
 
     /// Associated error type.
+    #[cfg(feature = "defmt")]
+    type Error: crate::Error + defmt::Format;
+    /// Associated error type.
+    #[cfg(not(feature = "defmt"))]
     type Error: crate::Error;
 
     /// Puts a frame in the transmit buffer. Blocks until space is available in

embedded-can/src/nb.rs

@@ -6,6 +6,10 @@ pub trait Can {
     type Frame: crate::Frame;
 
     /// Associated error type.
+    #[cfg(feature = "defmt")]
+    type Error: crate::Error + defmt::Format;
+    /// Associated error type.
+    #[cfg(not(feature = "defmt"))]
     type Error: crate::Error;
 
     /// Puts a frame in the transmit buffer to be sent on the bus.

embedded-hal/src/digital.rs

@@ -59,7 +59,11 @@ impl core::fmt::Display for ErrorKind {
 ///
 /// This just defines the error type, to be used by the other traits.
 pub trait ErrorType {
-    /// Error type
+    /// Error type.
+    #[cfg(feature = "defmt-03")]
+    type Error: Error + defmt::Format;
+    /// Error type.
+    #[cfg(not(feature = "defmt-03"))]
     type Error: Error;
 }
 

embedded-hal/src/i2c.rs

@@ -265,7 +265,11 @@ impl core::fmt::Display for NoAcknowledgeSource {
 ///
 /// This just defines the error type, to be used by the other traits.
 pub trait ErrorType {
-    /// Error type
+    /// Error type.
+    #[cfg(feature = "defmt-03")]
+    type Error: Error + defmt::Format;
+    /// Error type.
+    #[cfg(not(feature = "defmt-03"))]
     type Error: Error;
 }
 

embedded-hal/src/pwm.rs

@@ -58,7 +58,11 @@ impl core::fmt::Display for ErrorKind {
 ///
 /// This just defines the error type, to be used by the other traits.
 pub trait ErrorType {
-    /// Error type
+    /// Error type.
+    #[cfg(feature = "defmt-03")]
+    type Error: Error + defmt::Format;
+    /// Error type.
+    #[cfg(not(feature = "defmt-03"))]
     type Error: Error;
 }
 

embedded-hal/src/spi.rs

@@ -307,6 +307,10 @@ impl core::fmt::Display for ErrorKind {
 /// This just defines the error type, to be used by the other SPI traits.
 pub trait ErrorType {
     /// Error type.
+    #[cfg(feature = "defmt-03")]
+    type Error: Error + defmt::Format;
+    /// Error type.
+    #[cfg(not(feature = "defmt-03"))]
     type Error: Error;
 }
 

embedded-io/src/lib.rs

@@ -218,6 +218,10 @@ impl Error for std::io::Error {
 /// which might be different types.
 pub trait ErrorType {
     /// Error type of all the IO operations on this type.
+    #[cfg(feature = "defmt")]
+    type Error: Error + defmt::Format;
+    /// Error type of all the IO operations on this type.
+    #[cfg(not(feature = "defmt"))]
     type Error: Error;
 }