fmt_compat.hpp

#pragma once
 
#include <fmt/core.h>
 
#if FMT_VERSION < 80000
#define USERVER_FMT_CONST
 
namespace fmt {
 
template <typename S>
const S& runtime(const S& s) {
  return s;
}
 
}  // namespace fmt
#else
#define USERVER_FMT_CONST const
#endif