diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0f170c0..c5dd55b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,10 @@ project(FeatherLog)
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
+add_compile_definitions(FLOG_IMPL_CONSOLE_OUTPUTTER) # build with default console outputter
+add_compile_definitions(FLOG_IMPL_FILE_OUTPUTTER) # build with default file outputter
+add_compile_definitions(FLOG_IMPL_DEFAULT_FORMATTER) # build with default formatter
+
 # 定义源文件
 set(${PROJECT_NAME}_SOURCES
         include/featherlog/log_manager.hpp
@@ -16,7 +20,10 @@ set(${PROJECT_NAME}_SOURCES
         include/featherlog/push_result.hpp
         include/featherlog/log_message_flag.hpp
         include/featherlog/featherlog.hpp
-        src/log_manager.cpp)
+        src/log_manager.cpp
+        src/log_message_flag.cpp
+        include/featherlog/impl/flog_impl.hpp
+        include/featherlog/impl/console_outputter.hpp)
 
 # 生成静态库
 add_library(${PROJECT_NAME}_static STATIC ${${PROJECT_NAME}_SOURCES})
diff --git a/include/featherlog/featherlog.hpp b/include/featherlog/featherlog.hpp
index dc0af5c..191b389 100644
--- a/include/featherlog/featherlog.hpp
+++ b/include/featherlog/featherlog.hpp
@@ -2,13 +2,15 @@
 #define FEATHERLOG_FEATHERLOG_HPP
 
 #include <featherlog/flog_definitions.h>
+#include <featherlog/logger.hpp>
 #include <featherlog/log_formatter.hpp>
 #include <featherlog/log_level.hpp>
 #include <featherlog/log_manager.hpp>
 #include <featherlog/log_message.hpp>
 #include <featherlog/log_message_flag.hpp>
 #include <featherlog/log_outputter.hpp>
-#include <featherlog/logger.hpp>
 #include <featherlog/push_result.hpp>
 
+#include <featherlog/impl/flog_impl.hpp>
+
 #endif
diff --git a/include/featherlog/flog_definitions.h b/include/featherlog/flog_definitions.h
index 6576cdc..f2617ee 100644
--- a/include/featherlog/flog_definitions.h
+++ b/include/featherlog/flog_definitions.h
@@ -27,4 +27,8 @@
 
 #endif
 
+#ifndef _NODISCARD
+#define _NODISCARD [[nodiscard]]
+#endif
+
 #endif
diff --git a/include/featherlog/impl/console_outputter.hpp b/include/featherlog/impl/console_outputter.hpp
new file mode 100644
index 0000000..4c8bd45
--- /dev/null
+++ b/include/featherlog/impl/console_outputter.hpp
@@ -0,0 +1,5 @@
+#pragma once
+
+#ifdef FLOG_IMPL_CONSOLE_OUTPUTTER
+
+#endif
diff --git a/include/featherlog/impl/flog_impl.hpp b/include/featherlog/impl/flog_impl.hpp
new file mode 100644
index 0000000..b703c41
--- /dev/null
+++ b/include/featherlog/impl/flog_impl.hpp
@@ -0,0 +1,7 @@
+#ifndef FEATHERLOG_IMPL_FLOG_IMPL_HPP
+#define FEATHERLOG_IMPL_FLOG_IMPL_HPP
+
+#include <featherlog/impl/console_outputter.hpp>
+
+#endif
+
diff --git a/include/featherlog/log_formatter.hpp b/include/featherlog/log_formatter.hpp
index 98cfd89..e2be7b2 100644
--- a/include/featherlog/log_formatter.hpp
+++ b/include/featherlog/log_formatter.hpp
@@ -1,5 +1,4 @@
-#ifndef FEATHERLOG_LOG_FORMATTER_HPP
-#define FEATHERLOG_LOG_FORMATTER_HPP
+#pragma once
 
 #include <string>
 #include <featherlog/flog_definitions.h>
@@ -11,8 +10,6 @@ namespace flog
     public:
         virtual ~LogFormatter() = default;
 
-        virtual std::string FLOG_CALL format() = 0;
+        _NODISCARD virtual std::string FLOG_CALL format(const LogMessage& message) = 0;
     };
 }
-
-#endif
diff --git a/include/featherlog/log_level.hpp b/include/featherlog/log_level.hpp
index 473a900..10b8e4b 100644
--- a/include/featherlog/log_level.hpp
+++ b/include/featherlog/log_level.hpp
@@ -1,5 +1,4 @@
-#ifndef FEATHERLOG_LOG_LEVEL_HPP
-#define FEATHERLOG_LOG_LEVEL_HPP
+#pragma once
 
 #include <cstdint>
 
@@ -18,5 +17,3 @@ namespace flog
         OFF = std::numeric_limits<LogLevelType>::max()
     };
 }
-
-#endif
diff --git a/include/featherlog/log_manager.hpp b/include/featherlog/log_manager.hpp
index f38dd64..31a14a3 100644
--- a/include/featherlog/log_manager.hpp
+++ b/include/featherlog/log_manager.hpp
@@ -1,5 +1,4 @@
-#ifndef FEATHERLOG_LOG_MANAGER_HPP
-#define FEATHERLOG_LOG_MANAGER_HPP
+#pragma once
 
 #include <atomic>
 #include <memory>
@@ -28,14 +27,16 @@ namespace flog
 
         ~LogManager();
 
-        LogLevel FLOG_CALL get_min_log_level() const noexcept;
-        void FLOG_CALL set_min_log_level(LogLevel level) noexcept;
+        _NODISCARD LogLevel FLOG_CALL get_min_log_level() const noexcept;
+                   void     FLOG_CALL set_min_log_level(LogLevel level) noexcept;
 
-        PushResult<std::unique_ptr<LogOutputter>> FLOG_CALL add_outputter(std::unique_ptr<LogOutputter> outputter);
-        bool FLOG_CALL contains_outputter(std::string_view name) const noexcept;
-        std::optional<std::unique_ptr<LogOutputter>> FLOG_CALL try_delete_outputter(std::string_view name) noexcept;
+        _NODISCARD PushResult<std::unique_ptr<LogOutputter>> FLOG_CALL add_outputter(
+            std::unique_ptr<LogOutputter> outputter);
 
-        std::shared_ptr<Logger> FLOG_CALL get_logger(const std::string &name);
+        _NODISCARD bool FLOG_CALL contains_outputter(std::string_view name) const;
+        std::optional<std::unique_ptr<LogOutputter>> FLOG_CALL try_delete_outputter(std::string_view name);
+
+        _NODISCARD std::shared_ptr<Logger> FLOG_CALL get_logger(const std::string &name);
 
         size_t FLOG_CALL clean_unused_loggers();
 
@@ -53,5 +54,3 @@ namespace flog
         std::unordered_map<std::string, std::shared_ptr<Logger>> m_loggers;
     };
 }
-
-#endif
diff --git a/include/featherlog/log_message.hpp b/include/featherlog/log_message.hpp
index 7286d9f..5615068 100644
--- a/include/featherlog/log_message.hpp
+++ b/include/featherlog/log_message.hpp
@@ -1,6 +1,4 @@
-#ifndef FEATHERLOG_LOG_MESSAGE_HPP
-#define FEATHERLOG_LOG_MESSAGE_HPP
-
+#pragma once
 
 #include <chrono>
 #include <string_view>
@@ -19,5 +17,3 @@ namespace flog
         MessageFlag flag;
     };
 }
-
-#endif
diff --git a/include/featherlog/log_message_flag.hpp b/include/featherlog/log_message_flag.hpp
index 4752c50..66eb1c2 100644
--- a/include/featherlog/log_message_flag.hpp
+++ b/include/featherlog/log_message_flag.hpp
@@ -1,7 +1,7 @@
-#ifndef FEATHERLOG_LOG_MESSAGE_FLAG_HPP
-#define FEATHERLOG_LOG_MESSAGE_FLAG_HPP
+#pragma once
 
 #include <array>
+#include <limits>
 
 namespace flog
 {
@@ -21,12 +21,11 @@ namespace flog
         _NODISCARD bool isFull() const noexcept { return flagCount >= std::numeric_limits<MessageFlag>::digits; }
         _NODISCARD bool pushable() const noexcept { return !isFull(); }
         _NODISCARD bool isEmpty() const noexcept { return flagCount == 0; }
-        // _NODISCARD
+
+        _NODISCARD bool contains(std::string_view name) const noexcept;
 
     private:
         std::array<std::string, std::numeric_limits<MessageFlag>::digits> m_flagMap{};
         size_t flagCount { 0 };
     };
 }
-
-#endif
diff --git a/include/featherlog/log_outputter.hpp b/include/featherlog/log_outputter.hpp
index 5e92576..724b10d 100644
--- a/include/featherlog/log_outputter.hpp
+++ b/include/featherlog/log_outputter.hpp
@@ -1,5 +1,4 @@
-#ifndef FEATHERLOG_LOG_OUTPUTTER_HPP
-#define FEATHERLOG_LOG_OUTPUTTER_HPP
+#pragma once
 
 #include <memory>
 
@@ -11,7 +10,8 @@ namespace flog {
     class FLOG_API LogOutputter {
     public:
         explicit LogOutputter(std::string name, std::unique_ptr<LogFormatter> formatter) noexcept
-            : m_name(std::move(name)), m_logFormatter(std::move(formatter)) {}
+            : m_name(std::move(name)), m_logFormatter(std::move(formatter))
+        {  }
 
         virtual ~LogOutputter() = default;
 
@@ -28,5 +28,3 @@ namespace flog {
         std::unique_ptr<LogFormatter> m_logFormatter;
     };
 }
-
-#endif
diff --git a/include/featherlog/logger.hpp b/include/featherlog/logger.hpp
index d2d9a84..5b4ae31 100644
--- a/include/featherlog/logger.hpp
+++ b/include/featherlog/logger.hpp
@@ -1,5 +1,4 @@
-#ifndef FEATHERLOG_LOGGER_HPP
-#define FEATHERLOG_LOGGER_HPP
+#pragma once
 
 #include <format>
 #include <source_location>
@@ -31,5 +30,3 @@ namespace flog
         const std::weak_ptr<LogManager> m_logManager;
     };
 }
-
-#endif
diff --git a/include/featherlog/push_result.hpp b/include/featherlog/push_result.hpp
index e9cfea7..e77bbb0 100644
--- a/include/featherlog/push_result.hpp
+++ b/include/featherlog/push_result.hpp
@@ -1,5 +1,4 @@
-#ifndef FEATHERLOG_PUSH_RESULT_HPP
-#define FEATHERLOG_PUSH_RESULT_HPP
+#pragma once
 
 #include <optional>
 #include <functional>
@@ -37,5 +36,3 @@ namespace flog
         const std::optional<T> m_value = std::nullopt;
     };
 }
-
-#endif
diff --git a/src/log_manager.cpp b/src/log_manager.cpp
index eec6fac..c07af34 100644
--- a/src/log_manager.cpp
+++ b/src/log_manager.cpp
@@ -43,13 +43,13 @@ namespace flog
         return PushResult<std::unique_ptr<LogOutputter>>::success();
     }
 
-    bool LogManager::contains_outputter(const std::string_view name) const noexcept
+    bool LogManager::contains_outputter(const std::string_view name) const
     {
         std::shared_lock lock(m_logOutputtersMutex);
         return m_logOutputters.contains(name.data());
     }
 
-    std::optional<std::unique_ptr<LogOutputter>> LogManager::try_delete_outputter(const std::string_view name) noexcept
+    std::optional<std::unique_ptr<LogOutputter>> LogManager::try_delete_outputter(const std::string_view name)
     {
         if (contains_outputter(name))
         {
diff --git a/src/log_message_flag.cpp b/src/log_message_flag.cpp
new file mode 100644
index 0000000..473a0f4