From 3513333e72e4a61114dc3c5516ba7fed928885d0 Mon Sep 17 00:00:00 2001
From: Daniel Willmann <daniel@totalueberwachung.de>
Date: Sun, 27 Jun 2021 22:37:12 +0200
Subject: [PATCH] Implement Display for ByteOffset

Without this patch ErrorTree<BytesOffset> does not implement Error which
makes using it (e.g. with final_parser) a lot more cumbersome.
---
 src/final_parser.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/final_parser.rs b/src/final_parser.rs
index e8781f4..51d9f21 100644
--- a/src/final_parser.rs
+++ b/src/final_parser.rs
@@ -72,6 +72,16 @@ impl<I> RecreateContext<I> for I {
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
 pub struct ByteOffset(pub usize);
 
+impl Display for ByteOffset {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        if f.alternate() {
+            write!(f, "byte offset {}", self.0)
+        } else {
+            write!(f, "{}", self.0)
+        }
+    }
+}
+
 impl<I: Offset> RecreateContext<I> for ByteOffset {
     fn recreate_context(original_input: I, tail: I) -> Self {
         ByteOffset(original_input.offset(&tail))