From 0ea20f245f64516c92d4be2546504c1d81b6ed5d Mon Sep 17 00:00:00 2001
From: Philippe-Cholet <44676486+Philippe-Cholet@users.noreply.github.com>
Date: Fri, 3 May 2024 14:52:35 +0200
Subject: [PATCH] Implement `Debug` for `FormatWith`, same as `Display`

The type `std::fmt::Arguments` (returned by `format_args!`) similarly delegates `Debug` to `Display`.
---
 src/format.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/format.rs b/src/format.rs
index c4cb65dcb..83382c5a5 100644
--- a/src/format.rs
+++ b/src/format.rs
@@ -71,6 +71,16 @@ where
     }
 }
 
+impl<'a, I, F> fmt::Debug for FormatWith<'a, I, F>
+where
+    I: Iterator,
+    F: FnMut(I::Item, &mut dyn FnMut(&dyn fmt::Display) -> fmt::Result) -> fmt::Result,
+{
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Display::fmt(self, f)
+    }
+}
+
 impl<'a, I> Format<'a, I>
 where
     I: Iterator,