add is_extended default impl for CAN frame

Author: robamu

embedded-can/CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Added `core::error::Error` implementations for every custom `impl Error`
 - Increased MSRV to 1.81 due to `core::error::Error`
+- Added `is_extended` default implementation for CAN frame.
 
 ## [v0.4.1] - 2022-09-28
 

embedded-can/src/lib.rs

@@ -23,7 +23,12 @@ pub trait Frame: Sized {
     fn new_remote(id: impl Into<Id>, dlc: usize) -> Option<Self>;
 
     /// Returns true if this frame is an extended frame.
-    fn is_extended(&self) -> bool;
+    fn is_extended(&self) -> bool {
+        match self.id() {
+            Id::Standard(_) => false,
+            Id::Extended(_) => true,
+        }
+    }
 
     /// Returns true if this frame is a standard frame.
     fn is_standard(&self) -> bool {