more well-defined definition of list instantiation using a pre-defined type

example/example.cpp

@@ -393,5 +393,5 @@ void attribute_example() {
     std::string logfmt_pattern = "time=%Y-%m-%dT%H:%M:%S.%f%z, name=%n, level=%^%l%$, process=%P, thread=%t, message=\"%v\", ";
     logfmt_logger->set_pattern(logfmt_pattern);
 
-    logfmt_logger->log(spdlog::level::info, "logfmt structured logging", {{"key\n1", "value\n1"}, {"key\r\n2", "value\r\n2"}});
+    logfmt_logger->log(spdlog::level::info, "logfmt structured logging", spdlog::attribute_list{{"key\n1", "value\n1"}, {"key\r\n2", "value\r\n2"}});
 }

include/spdlog/details/log_attr.h

@@ -2,7 +2,7 @@
 
 #include <string>
 #include <string_view>
-#include <concepts>
+#include <vector>
 #include "attr_composer.h"
 
 namespace spdlog {
@@ -42,4 +42,7 @@ public:
 };
 
 } // namespace details
+
+using attribute_list = std::vector<details::attr>;
+
 } // namespace spdlog

include/spdlog/details/log_msg.h

@@ -29,7 +29,7 @@ struct SPDLOG_API log_msg
 
     source_loc source;
     string_view_t payload;
-    std::vector<attr> attributes;
+    attribute_list attributes;
 };
 } // namespace details
 } // namespace spdlog

include/spdlog/logger.h

@@ -85,7 +85,7 @@ public:
     void swap(spdlog::logger &other) SPDLOG_NOEXCEPT;
 
     template <typename T>
-    void log(level::level_enum lvl, const T &msg, std::initializer_list<details::attr> attrs)
+    void log(level::level_enum lvl, const T &msg, attribute_list attrs)
     {
         log(source_loc{}, lvl, msg, attrs);
     }
@@ -128,7 +128,7 @@ public:
         log_it_(log_msg, log_enabled, traceback_enabled);
     }
 
-    void log(source_loc loc, level::level_enum lvl, string_view_t msg, std::initializer_list<details::attr> attrs)
+    void log(source_loc loc, level::level_enum lvl, string_view_t msg, attribute_list attrs)
     {
         bool log_enabled = should_log(lvl);
         bool traceback_enabled = tracer_.enabled();