From 4687f8e37e8f6ebf2112445750ec21d85164abd6 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <viz@meta.com>
Date: Wed, 3 Jan 2024 06:22:57 -0800
Subject: [PATCH] Remove dependency on <iterator>

---
 include/fmt/core.h   | 4 +---
 include/fmt/format.h | 1 +
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/include/fmt/core.h b/include/fmt/core.h
index 2d71424e..750f2712 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -11,7 +11,6 @@
 #include <cstddef>   // std::byte
 #include <cstdio>    // std::FILE
 #include <cstring>   // std::strlen
-#include <iterator>  // DEPRECATED!
 #include <limits>    // std::numeric_limits
 #include <string>
 #include <type_traits>
@@ -1578,8 +1577,7 @@ template <> struct is_output_iterator<appender, char> : std::true_type {};
 template <typename It, typename T>
 struct is_output_iterator<
     It, T,
-    void_t<typename std::iterator_traits<It>::iterator_category,
-           decltype(*std::declval<It>() = std::declval<T>())>>
+    void_t<decltype(*std::declval<It&>()++ = std::declval<T>())>>
     : std::true_type {};
 
 template <typename It> struct is_back_insert_iterator : std::false_type {};
diff --git a/include/fmt/format.h b/include/fmt/format.h
index 4972a02b..9a5d3f90 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -37,6 +37,7 @@
 #include <cstdint>           // uint32_t
 #include <cstring>           // std::memcpy
 #include <initializer_list>  // std::initializer_list
+#include <iterator>
 #include <limits>            // std::numeric_limits
 #include <memory>            // std::uninitialized_copy
 #include <stdexcept>         // std::runtime_error