From c7f0e9c3aaa8c6164e2fa235bce8081e61a7b5c6 Mon Sep 17 00:00:00 2001
From: DavidAce <aceituno@kth.se>
Date: Wed, 14 Feb 2024 09:19:08 +0100
Subject: [PATCH] Fix h5pp::format and h5pp::print for fmt versions < 8

---
 examples/example-02c-stdvector-complex.cpp |  2 +-
 include/h5pp/details/h5ppFormat.h          | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/examples/example-02c-stdvector-complex.cpp b/examples/example-02c-stdvector-complex.cpp
index 17aaa90..564f693 100644
--- a/examples/example-02c-stdvector-complex.cpp
+++ b/examples/example-02c-stdvector-complex.cpp
@@ -1,7 +1,7 @@
 #include <h5pp/h5pp.h>
 
 template<typename ...Args>
-void print_complex(fmt::format_string<Args...> msg, const std::vector<std::complex<double>> &v) {
+void print_complex(std::string_view msg, const std::vector<std::complex<double>> &v) {
     h5pp::print(msg);
     for(const auto &c : v) h5pp::print("{} + i{}, ", std::real(c), std::imag(c));
     h5pp::print("\n");
diff --git a/include/h5pp/details/h5ppFormat.h b/include/h5pp/details/h5ppFormat.h
index f11ff13..26ed5c5 100644
--- a/include/h5pp/details/h5ppFormat.h
+++ b/include/h5pp/details/h5ppFormat.h
@@ -46,6 +46,7 @@
 #if defined(FMT_FORMAT_H_) && (defined(H5PP_USE_FMT) || defined(H5PP_USE_SPDLOG))
 
 namespace h5pp {
+    #if defined(FMT_VERSION) && FMT_VERSION >= 80000
     template<typename... Args>
     [[nodiscard]] std::string format(fmt::format_string<Args...> fs, Args &&...args) {
         return fmt::format(fs, std::forward<Args>(args)...);
@@ -54,6 +55,16 @@ namespace h5pp {
     void print(fmt::format_string<Args...> fs, Args &&...args) {
         fmt::print(fs, std::forward<Args>(args)...);
     }
+    #else
+    template<typename... Args>
+    [[nodiscard]] std::string format(Args... args) {
+        return fmt::format(std::forward<Args>(args)...);
+    }
+    template<typename... Args>
+    void print(Args... args) {
+        fmt::print(std::forward<Args>(args)...);
+    }
+    #endif
 }
 #else