Add IntoContext and Explain for Arc<dyn Error>

src/context.rs

@@ -218,6 +218,13 @@ where
     }
 }
 
+impl IntoContext for Arc<dyn std::error::Error + Send + Sync> {
+    #[inline]
+    fn into_context(self) -> Context {
+        Context::new(Detail::Error(PrivateError(self)))
+    }
+}
+
 impl<C, F> IntoContext for F
 where
     C: IntoContext,

src/explain.rs

@@ -77,6 +77,16 @@ where
     }
 }
 
+impl Explain for Arc<dyn std::error::Error + Send + Sync> {
+    type Output = How;
+
+    #[track_caller]
+    fn context(self, context: impl IntoContext) -> Self::Output {
+        How::new(self.into_context())
+            .context(context)
+    }
+}
+
 impl<T> Explain for Option<T> {
     type Output = Result<T, How>;