From 7bd776e7db41d18056a2d526efb117bd51420d7a Mon Sep 17 00:00:00 2001
From: Victor Zverovich <victor.zverovich@gmail.com>
Date: Wed, 26 Jul 2017 08:48:59 -0700
Subject: [PATCH] Explain why null_terminating_iterator is used

---
 fmt/format.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/fmt/format.h b/fmt/format.h
index 18e93199..8990d295 100644
--- a/fmt/format.h
+++ b/fmt/format.h
@@ -1947,7 +1947,9 @@ class null_terminating_iterator;
 template <typename Char>
 const Char *pointer_from(null_terminating_iterator<Char> it);
 
-// An iterator that produces a null terminator on *end.
+// An iterator that produces a null terminator on *end. This simplifies parsing
+// and allows comparing the performance of processing a null-terminated string
+// vs string_view.
 template <typename Char>
 class null_terminating_iterator {
  public: