Fix for libstdc++ with clang

CMakeLists.txt

@@ -51,10 +51,9 @@ set(CPM_USE_LOCAL_PACKAGES OFF)
 CPMAddPackage(
   NAME fmt
   URL
-  "https://github.com/linuxnyasha/fmt_import/archive/refs/heads/linuxnyasha-patch-1.zip"
+  "https://github.com/fmtlib/fmt/releases/download/11.0.2/fmt-11.0.2.zip"
   EXCLUDE_FROM_ALL ON
   OPTIONS "FMT_MODULE ON"
-  # Fixes for fmt module and constexpr fmt::formatted_size
 )
 
 set(CPM_USE_LOCAL_PACKAGES ${TMP})

src/constexpr_string.cpp

@@ -32,7 +32,7 @@ struct ConstexprString {
   constexpr ConstexprString(const char (&data)[Size]) : data{} {  // NOLINT
     std::ranges::copy_n(data, Size, this->data.begin());
   };
-  explicit constexpr ConstexprString(std::string data) : data{} {
+  explicit constexpr ConstexprString(std::string_view data) : data{} {
     std::ranges::copy_n(data.begin(), Size, this->data.begin());
   };
   explicit constexpr ConstexprString(std::array<char, Size> data) : data(std::move(data)) {};

src/utils.cpp

@@ -12,7 +12,7 @@ import utempl.type_list;
 import utempl.overloaded;
 
 #else
-
+#include <optional>
 #include <utempl/constexpr_string.hpp>
 #include <utempl/overloaded.hpp>
 #include <utempl/tuple.hpp>