From 882702c219153ced194ab813a4739cf32c9aa545 Mon Sep 17 00:00:00 2001
From: Victor Zverovich <viz@meta.com>
Date: Mon, 1 Sep 2025 12:21:17 -0700
Subject: [PATCH] Apply clang-tidy

---
 test/args-test.cc   |  2 +-
 test/base-test.cc   |  4 ++--
 test/chrono-test.cc | 12 ++++++------
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/test/args-test.cc b/test/args-test.cc
index e3efa244..dd0e57dc 100644
--- a/test/args-test.cc
+++ b/test/args-test.cc
@@ -64,7 +64,7 @@ TEST(args_test, custom_format) {
 }
 
 struct to_stringable {
-  friend fmt::string_view to_string_view(to_stringable) { return {}; }
+  friend auto to_string_view(to_stringable) -> fmt::string_view { return {}; }
 };
 
 FMT_BEGIN_NAMESPACE
diff --git a/test/base-test.cc b/test/base-test.cc
index 1de6a8eb..0231e422 100644
--- a/test/base-test.cc
+++ b/test/base-test.cc
@@ -873,11 +873,11 @@ struct custom_container {
 
   using value_type = char;
 
-  size_t size() const { return 0; }
+  auto size() const -> size_t { return 0; }
   void resize(size_t) {}
 
   void push_back(char) {}
-  char& operator[](size_t) { return data; }
+  auto operator[](size_t) -> char& { return data; }
 };
 
 FMT_BEGIN_NAMESPACE
diff --git a/test/chrono-test.cc b/test/chrono-test.cc
index b3b199ed..98b37000 100644
--- a/test/chrono-test.cc
+++ b/test/chrono-test.cc
@@ -55,8 +55,8 @@ auto make_second(int s) -> std::tm {
   return time;
 }
 
-std::string system_strftime(const std::string& format, const std::tm* timeptr,
-                            std::locale* locptr = nullptr) {
+auto system_strftime(const std::string& format, const std::tm* timeptr,
+                     std::locale* locptr = nullptr) -> std::string {
   auto loc = locptr ? *locptr : std::locale::classic();
   auto& facet = std::use_facet<std::time_put<char>>(loc);
   std::ostringstream os;
@@ -73,8 +73,8 @@ std::string system_strftime(const std::string& format, const std::tm* timeptr,
 #endif
 }
 
-FMT_CONSTEXPR std::tm make_tm(int year, int mon, int mday, int hour, int min,
-                              int sec) {
+FMT_CONSTEXPR auto make_tm(int year, int mon, int mday, int hour, int min,
+                           int sec) -> std::tm {
   auto tm = std::tm();
   tm.tm_sec = sec;
   tm.tm_min = min;
@@ -336,12 +336,12 @@ TEST(chrono_test, local_time) {
 }
 
 template <typename T, FMT_ENABLE_IF(fmt::detail::has_tm_gmtoff<T>::value)>
-bool set_tm_gmtoff(T& time, long offset) {
+auto set_tm_gmtoff(T& time, long offset) -> bool {
   time.tm_gmtoff = offset;
   return true;
 }
 template <typename T, FMT_ENABLE_IF(!fmt::detail::has_tm_gmtoff<T>::value)>
-bool set_tm_gmtoff(T&, long) {
+auto set_tm_gmtoff(T&, long) -> bool {
   return false;
 }