From 3d6053e25c28c77fc2f3cb4f06fe648cbb8af049 Mon Sep 17 00:00:00 2001
From: Cristi <cristi@emailaddressmanager.com>
Date: Thu, 7 Jan 2021 18:17:11 +0200
Subject: [PATCH 1/3] Ranges copy wchar_t

---
 include/fmt/ranges.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/include/fmt/ranges.h b/include/fmt/ranges.h
index 0ebf96526442..4c04f9ea34a7 100644
--- a/include/fmt/ranges.h
+++ b/include/fmt/ranges.h
@@ -67,6 +67,12 @@ OutputIterator copy(char ch, OutputIterator out) {
   return out;
 }
 
+template <typename OutputIterator>
+OutputIterator copy(wchar_t ch, OutputIterator out) {
+  *out++ = ch;
+  return out;
+}
+
 /// Return true value if T has std::string interface, like std::string_view.
 template <typename T> class is_like_std_string {
   template <typename U>

From 8252be63b3d26c77c3f3b819c4ce65b54576d699 Mon Sep 17 00:00:00 2001
From: Cristi <cristi@emailaddressmanager.com>
Date: Thu, 7 Jan 2021 23:03:47 +0200
Subject: [PATCH 2/3] arg_join formatter not working for wide strings

---
 include/fmt/format.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/fmt/format.h b/include/fmt/format.h
index 32b42dd54c54..ee01391c98cd 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -3720,7 +3720,7 @@ struct formatter<arg_join<It, Sentinel, Char>, Char> {
  private:
   using value_type = typename std::iterator_traits<It>::value_type;
   using formatter_type =
-      conditional_t<has_formatter<value_type, format_context>::value,
+      conditional_t<has_formatter<value_type, buffer_context<Char>>::value,
                     formatter<value_type, Char>,
                     detail::fallback_formatter<value_type, Char>>;
 

From ac77058a8c8b6b6fb61ce296ed29fdaba4c54e84 Mon Sep 17 00:00:00 2001
From: Cristi <cristi@emailaddressmanager.com>
Date: Thu, 15 Apr 2021 19:06:33 +0300
Subject: [PATCH 3/3] Added ranges wide string tests

---
 test/ranges-test.cc | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/test/ranges-test.cc b/test/ranges-test.cc
index 30ed97f21233..8fee3e14e6b8 100644
--- a/test/ranges-test.cc
+++ b/test/ranges-test.cc
@@ -224,6 +224,25 @@ TEST(RangesTest, JoinTuple) {
   EXPECT_EQ("4", fmt::format("{}", fmt::join(t4, "/")));
 }
 
+TEST(RangesTest, WideStringJoinTuple) {
+  // Value tuple args
+  std::tuple<wchar_t, int, float> t1 = std::make_tuple('a', 1, 2.0f);
+  EXPECT_EQ(L"(a, 1, 2)", fmt::format(L"({})", fmt::join(t1, L", ")));
+
+  // Testing lvalue tuple args
+  int x = 4;
+  std::tuple<wchar_t, int&> t2{'b', x};
+  EXPECT_EQ(L"b + 4", fmt::format(L"{}", fmt::join(t2, L" + ")));
+
+  // Empty tuple
+  std::tuple<> t3;
+  EXPECT_EQ(L"", fmt::format(L"{}", fmt::join(t3, L"|")));
+
+  // Single element tuple
+  std::tuple<float> t4{4.0f};
+  EXPECT_EQ(L"4", fmt::format(L"{}", fmt::join(t4, L"/")));
+}
+
 TEST(RangesTest, JoinInitializerList) {
   EXPECT_EQ("1, 2, 3", fmt::format("{}", fmt::join({1, 2, 3}, ", ")));
   EXPECT_EQ("fmt rocks !",