From c8d8b88223699e6876915911a5ddd419f029b56f Mon Sep 17 00:00:00 2001
From: Alexey Ochapov <alexez@alexez.com>
Date: Sat, 13 Mar 2021 17:36:53 +0300
Subject: [PATCH] fix GCC 7,8,9 warning about unused but set parameter (#2177)

---
 include/fmt/compile.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/include/fmt/compile.h b/include/fmt/compile.h
index 49774099..fc419266 100644
--- a/include/fmt/compile.h
+++ b/include/fmt/compile.h
@@ -557,9 +557,10 @@ template <typename Char> struct runtime_named_field {
   basic_string_view<Char> name;
 
   template <typename OutputIt, typename T>
-  constexpr static bool try_format_argument(OutputIt& out,
-                                            basic_string_view<Char> arg_name,
-                                            const T& arg) {
+  constexpr static bool try_format_argument(
+      OutputIt& out,
+      // [[maybe_unused]] due to unused-but-set-parameter warning in GCC 7,8,9
+      [[maybe_unused]] basic_string_view<Char> arg_name, const T& arg) {
     if constexpr (is_named_arg<typename std::remove_cv<T>::type>::value) {
       if (arg_name == arg.name) {
         out = write<Char>(out, arg.value);