From b5e9d0182a91a9c61885b51463cfe9ce629f6fa6 Mon Sep 17 00:00:00 2001
From: Lionel Faber <lionel1704@gmail.com>
Date: Mon, 21 Sep 2020 17:19:58 +0530
Subject: [PATCH] Implement Log for boxed data types that already implement the
 Log trait

---
 src/lib.rs | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index cf6f09052..36a530799 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1167,6 +1167,23 @@ impl Log for NopLogger {
     fn flush(&self) {}
 }
 
+#[cfg(feature = "std")]
+impl<T> Log for std::boxed::Box<T>
+where
+    T: ?Sized + Log,
+{
+    fn enabled(&self, metadata: &Metadata) -> bool {
+        self.as_ref().enabled(metadata)
+    }
+
+    fn log(&self, record: &Record) {
+        self.as_ref().log(record)
+    }
+    fn flush(&self) {
+        self.as_ref().flush()
+    }
+}
+
 /// Sets the global maximum log level.
 ///
 /// Generally, this should only be called by the active logging implementation.