diff --git a/CMakeLists.txt b/CMakeLists.txt
index 70c5a80..227216f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,7 @@ option(ENABLE_PROFILING "Enable asan" OFF)
 option(BUILD_TESTS "Enable testing" OFF)
 mark_as_advanced(ENABLE_PROFILING)
 
-set(SOURCE_LIST "src/filerd.cpp" "src/string.cpp" "src/binary.cpp" "src/static_string.cpp" "src/threadpool.cpp")
+set(SOURCE_LIST "src/filerd.cpp" "src/string.cpp" "src/binary.cpp" "src/static_string.cpp" "src/threadpool.cpp" "src/demangle.cpp")
 add_library(ensure OBJECT "src/ensure.cpp")
 target_compile_options(ensure PRIVATE -Wall -Wextra -pedantic -std=c++20)
 if(ENABLE_SHARED)
diff --git a/include/rexy/buffer.hpp b/include/rexy/buffer.hpp
index 86b8fb0..63a02f1 100644
--- a/include/rexy/buffer.hpp
+++ b/include/rexy/buffer.hpp
@@ -3,16 +3,16 @@
 	Copyright (C) 2021 rexy712
 
 	This program is free software: you can redistribute it and/or modify
-	it under the terms of the GNU Affero General Public License as published by
+	it under the terms of the GNU General Public License as published by
 	the Free Software Foundation, either version 3 of the License, or
 	(at your option) any later version.
 
 	This program is distributed in the hope that it will be useful,
 	but WITHOUT ANY WARRANTY; without even the implied warranty of
 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU Affero General Public License for more details.
+	GNU General Public License for more details.
 
-	You should have received a copy of the GNU Affero General Public License
+	You should have received a copy of the GNU General Public License
 	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
diff --git a/include/rexy/buffer.tpp b/include/rexy/buffer.tpp
index c04d8a6..4c15e32 100644
--- a/include/rexy/buffer.tpp
+++ b/include/rexy/buffer.tpp
@@ -3,16 +3,16 @@
 	Copyright (C) 2021 rexy712
 
 	This program is free software: you can redistribute it and/or modify
-	it under the terms of the GNU Affero General Public License as published by
+	it under the terms of the GNU General Public License as published by
 	the Free Software Foundation, either version 3 of the License, or
 	(at your option) any later version.
 
 	This program is distributed in the hope that it will be useful,
 	but WITHOUT ANY WARRANTY; without even the implied warranty of
 	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU Affero General Public License for more details.
+	GNU General Public License for more details.
 
-	You should have received a copy of the GNU Affero General Public License
+	You should have received a copy of the GNU General Public License
 	along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
diff --git a/include/rexy/debug_print.hpp b/include/rexy/debug_print.hpp
index 55f5c77..bdd68be 100644
--- a/include/rexy/debug_print.hpp
+++ b/include/rexy/debug_print.hpp
@@ -65,6 +65,21 @@
 		template<class... Args>
 		print(Args&&...) -> print<Args&&...>;
 		#ifdef REXY_ENABLE_COLOR_DEBUG
+			template<class... Args>
+			struct print_succ{
+				explicit print_succ(Args&&... args, const rexy::source_location& loc = rexy::source_location::current()){
+					std::fprintf(stderr, "%s", detail::color_green);
+					std::fprintf(stderr, "%s:%s:%d: ", loc.file_name(), loc.function_name(), loc.line());
+					std::fprintf(stderr, std::forward<Args>(args)...);
+					std::fprintf(stderr, "%s", detail::color_clear);
+				}
+				print_succ(const print_succ&) = delete;
+				print_succ(print_succ&&) = delete;
+				print_succ& operator=(const print_succ&) = delete;
+				print_succ& operator=(print_succ&&) = delete;
+			};
+			template<class... Args>
+			print_succ(Args&&...) -> print_succ<Args&&...>;
 			template<class... Args>
 			struct print_info{
 				explicit print_info(Args&&... args, const rexy::source_location& loc = rexy::source_location::current()){
@@ -111,6 +126,8 @@
 			template<class... Args>
 			print_error(Args&&...) -> print_error<Args&&...>;
 		#else
+			template<class... Args>
+			using print_succ = print<Args...>;
 			template<class... Args>
 			using print_info = print<Args...>;
 			template<class... Args>
@@ -124,6 +141,8 @@
 				template<class... Args>
 				using print = rexy::debug::print<Args...>;
 				template<class... Args>
+				using print_succ = rexy::debug::print_succ<Args...>;
+				template<class... Args>
 				using print_info = rexy::debug::print_info<Args...>;
 				template<class... Args>
 				using print_warn = rexy::debug::print_warn<Args...>;
@@ -133,22 +152,25 @@
 		#else
 			namespace verbose{
 				static constexpr inline void print(...){}
+				static constexpr inline void print_succ(...){}
+				static constexpr inline void print_info(...){}
 				static constexpr inline void print_warn(...){}
 				static constexpr inline void print_error(...){}
-				static constexpr inline void print_info(...){}
 			}
 		#endif //REXY_ENABLE_DEBUG_VERBOSE_OUTPUT
 	}
 #else
 		static constexpr inline void print(...){}
+		static constexpr inline void print_succ(...){}
+		static constexpr inline void print_info(...){}
 		static constexpr inline void print_warn(...){}
 		static constexpr inline void print_error(...){}
-		static constexpr inline void print_info(...){}
 		namespace verbose{
 			static constexpr inline void print(...){}
+			static constexpr inline void print_succ(...){}
+			static constexpr inline void print_info(...){}
 			static constexpr inline void print_warn(...){}
 			static constexpr inline void print_error(...){}
-			static constexpr inline void print_info(...){}
 		}
 #endif //REXY_ENABLE_DEBUG_OUTPUT
 
diff --git a/src/demangle.cpp b/src/demangle.cpp
new file mode 100644
index 0000000..88a6e4d
--- /dev/null
+++ b/src/demangle.cpp
@@ -0,0 +1,48 @@
+/**
+	This file is a part of rexy's general purpose library
+	Copyright (C) 2022 rexy712
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "rexy/demangle.hpp"
+
+#if defined(__GNUC__) && !defined(_MSC_VER)
+
+	#include <cstdlib> //free
+	#include <string>
+	#include <memory> //unique_ptr
+	#include <cxxabi.h> //__cxa_demangle
+
+	namespace util{
+		std::string demangle(const char* name){
+			int status = 0;
+			std::unique_ptr<char,void(*)(void*)> res{
+				abi::__cxa_demangle(name, nullptr, nullptr, &status),
+				std::free
+			};
+			return (status == 0) ? res.get() : name;
+		}
+	}
+
+#else
+
+	#include <string>
+	namespace util{
+		std::string demangle(const char* name){
+			return name;
+		}
+	}
+
+#endif