diff --git a/src/ArgParser.cpp b/src/ArgParser.cpp
index c97d230..8f6f578 100644
--- a/src/ArgParser.cpp
+++ b/src/ArgParser.cpp
@@ -16,7 +16,7 @@ namespace YYCC::ArgParser {
 
 	ArgumentList ArgumentList::CreateFromStd(int argc, char* argv[]) {
 		std::vector<yycc_u8string> args;
-		for (int i = 0; i < argc; ++i) {
+		for (int i = 1; i < argc; ++i) { // starts with 1 to remove first part (executable self)
 			if (argv[i] != nullptr)
 				args.emplace_back(yycc_u8string(YYCC::EncodingHelper::ToUTF8(argv[i])));
 		}
@@ -34,7 +34,7 @@ namespace YYCC::ArgParser {
 		int argc;
 		LPWSTR* argv = CommandLineToArgvW(GetCommandLineW(), &argc);
 		if (argv != NULL) {
-			for (int i = 0; i < argc; ++i) {
+			for (int i = 1; i < argc; ++i) { // starts with 1 to remove first part (executable self)
 				if (argv[i] != nullptr) {
 					yycc_u8string u8_argv;
 					if (YYCC::EncodingHelper::WcharToUTF8(argv[i], u8_argv))
@@ -63,44 +63,63 @@ namespace YYCC::ArgParser {
 		++m_ArgumentsIterator;
 	}
 
-	static bool IsLongName(const yycc_u8string& param, yycc_u8string_view* name_part) {
-		if (param.find(AbstractArgument::DOUBLE_DASH) != 0u) return false;
-		if (name_part != nullptr)
-			*name_part = yycc_u8string_view(param).substr(2u);
-		return true;
+	const yycc_u8string& ArgumentList::Current() const {
+		if (IsEOF()) throw std::runtime_error("attempt to get data on the tail of iterator.");
+		return *m_ArgumentsIterator;
 	}
-	static bool IsShortName(const yycc_u8string& param, yycc_char8_t* name_part) {
-		if (param.size() != 2u ||
-			param[0] != AbstractArgument::DASH ||
-			param[1] == AbstractArgument::DASH ||
-			param[1] < AbstractArgument::MIN_SHORT_NAME || param[1] > AbstractArgument::MAX_SHORT_NAME) {
-			return false;
-		}
-		if (name_part != nullptr)
-			*name_part = param[1];
-		return true;
-	}
-	bool ArgumentList::IsSwitch(
-		bool* is_long_name = nullptr,
-		yycc_u8string_view* long_name = nullptr,
-		yycc_char8_t* short_name = nullptr) const {
-		// get argument first
+
+	bool ArgumentList::IsSwitch(bool* is_long_name, yycc_u8string* long_name, yycc_char8_t* short_name) const {
+		// check eof first
 		if (IsEOF()) throw std::runtime_error("attempt to fetch data on the tail of iterator.");
-		const auto& param = *m_ArgumentsIterator;
 		// check long name first, then check short name
-		if (IsLongName(param, long_name)) {
+		if (IsLongNameSwitch(long_name)) {
 			if (is_long_name != nullptr) *is_long_name = true;
 			return true;
 		}
-		if (IsShortName(param, short_name)) {
+		if (IsShortNameSwitch(short_name)) {
 			if (is_long_name != nullptr) *is_long_name = false;
 			return true;
 		}
 		// not matched
 		return false;
 	}
+	bool ArgumentList::IsLongNameSwitch(yycc_u8string* name_part) const {
+		// fetch current parameter
+		if (IsEOF()) throw std::runtime_error("attempt to fetch data on the tail of iterator.");
+		const yycc_u8string& param = *m_ArgumentsIterator;
+		// find double slash
+		if (param.find(AbstractArgument::DOUBLE_DASH) != 0u) return false;
+		// check gotten long name
+		yycc_u8string_view long_name = yycc_u8string_view(param).substr(2u);
+		if (!AbstractArgument::IsLegalLongName(long_name)) return false;
+		// set checked long name if possible and return
+		if (name_part != nullptr)
+			*name_part = long_name;
+		return true;
+	}
+	bool ArgumentList::IsShortNameSwitch(yycc_char8_t* name_part) const {
+		// fetch current parameter
+		if (IsEOF()) throw std::runtime_error("attempt to fetch data on the tail of iterator.");
+		const yycc_u8string& param = *m_ArgumentsIterator;
+		// if the length is not exactly equal to 2, 
+		// or it not starts with dash,
+		// it is impossible a short name
+		if (param.size() != 2u || param[0] != AbstractArgument::DASH) return false;
+		// check gotten short name
+		yycc_char8_t short_name = param[1];
+		if (!AbstractArgument::IsLegalShortName(short_name)) return false;
+		// set checked short name if possible and return
+		if (name_part != nullptr)
+			*name_part = short_name;
+		return true;
+	}
 
-	bool ArgumentList::IsValue() const { return !IsSwitch(); }
+	bool ArgumentList::IsValue(yycc_u8string* val) const { 
+		bool is_value = !IsSwitch();
+		if (is_value && val != nullptr)
+			*val = *m_ArgumentsIterator;
+		return is_value;
+	}
 
 	bool ArgumentList::IsEOF() const { return m_ArgumentsIterator == m_Arguments.end(); }
 
@@ -116,23 +135,46 @@ namespace YYCC::ArgParser {
 	const yycc_char8_t AbstractArgument::MIN_SHORT_NAME = YYCC_U8_CHAR('!');
 	const yycc_char8_t AbstractArgument::MAX_SHORT_NAME = YYCC_U8_CHAR('~');
 
+	bool AbstractArgument::IsLegalShortName(yycc_char8_t short_name) {
+		if (short_name == AbstractArgument::DASH || // dash is not allowed
+			short_name < AbstractArgument::MIN_SHORT_NAME || short_name > AbstractArgument::MAX_SHORT_NAME) { // non-display ASCII chars are not allowed
+			return false;
+		}
+		// okey
+		return true;
+	}
+	bool AbstractArgument::IsLegalLongName(const yycc_u8string_view& long_name) {
+		// empty is not allowed
+		if (long_name.empty()) return false;
+		// non-display ASCII chars are not allowed
+		for (const auto& val : long_name) {
+			if (val < AbstractArgument::MIN_SHORT_NAME || val > AbstractArgument::MAX_SHORT_NAME)
+				return false;
+		}
+		// okey
+		return true;
+	}
+
 	AbstractArgument::AbstractArgument(
 		const yycc_char8_t* long_name, yycc_char8_t short_name,
 		const yycc_char8_t* description, const yycc_char8_t* argument_example,
 		bool is_optional) :
-		m_LongName(), m_ShortName(NO_SHORT_NAME), m_Description(), m_ArgumentExample(),
+		m_LongName(), m_ShortName(AbstractArgument::NO_SHORT_NAME), m_Description(), m_ArgumentExample(),
 		m_IsOptional(is_optional), m_IsCaptured(false) {
 
-		// try to assign long name
-		if (long_name != nullptr) m_LongName = long_name;
-		// try to assign short name
-		if (short_name == AbstractArgument::DASH ||
-			short_name < AbstractArgument::MIN_SHORT_NAME ||
-			short_name > AbstractArgument::MAX_SHORT_NAME) {
-			throw std::invalid_argument("given short name character is invalid.");
+		// try to assign long name and check it
+		if (long_name != nullptr) {
+			m_LongName = long_name;
+			if (!AbstractArgument::IsLegalLongName(m_LongName))
+				throw std::invalid_argument("Given long name is invalid.");
 		}
-		m_ShortName = short_name;
-		// check short name and long name
+		// try to assign short name and check it
+		if (short_name != AbstractArgument::NO_SHORT_NAME) {
+			m_ShortName = short_name;
+			if (!AbstractArgument::IsLegalShortName(m_ShortName))
+				throw std::invalid_argument("Given short name is invalid.");
+		}
+		// check short name and long name existence
 		if (!HasShortName() && !HasLongName())
 			throw std::invalid_argument("you must specify an one of long name or short name.");
 
@@ -187,8 +229,55 @@ namespace YYCC::ArgParser {
 
 	OptionContext::~OptionContext() {}
 
-	bool OptionContext::Parse(ArgumentList* al) {
-		return false; //todo
+	bool OptionContext::Parse(ArgumentList& al) {
+		// reset argument list first
+		al.Reset();
+
+		// prepare variables and start loop
+		yycc_u8string long_name;
+		yycc_char8_t short_name;
+		bool is_long_name;
+		while (!al.IsEOF()) {
+			// if we can not find any switches, return with error
+			if (!al.IsSwitch(&is_long_name, &long_name, &short_name)) return false;
+			
+			// find corresponding argument by long name or short name.
+			// if we can not find it, return with error.
+			AbstractArgument* arg;
+			if (is_long_name) {
+				auto finder = m_LongNameMap.find(long_name);
+				if (finder == m_LongNameMap.end()) return false;
+				arg = finder->second;
+			} else {
+				auto finder = m_ShortNameMap.find(short_name);
+				if (finder == m_ShortNameMap.end()) return false;
+				arg = finder->second;
+			}
+
+			// if this argument has been captured, raise error
+			if (arg->IsCaptured()) return false;
+			// call user parse function of found argument
+			if (arg->Parse(al)) {
+				// success. mark it is captured
+				arg->SetCaptured(true);
+			} else {
+				// failed, return error
+				return false;
+			}
+
+			// move to next argument
+			al.Next();
+		}
+
+		// after processing all argument,
+		// we should check whether all non-optional argument are captured.
+		for (const auto* arg : m_Arguments) {
+			if (!arg->IsOptional() && !arg->IsCaptured())
+				return false;
+		}
+
+		// okey
+		return true;
 	}
 
 	void OptionContext::Reset() {
diff --git a/src/ArgParser.hpp b/src/ArgParser.hpp
index 6321fb2..e882994 100644
--- a/src/ArgParser.hpp
+++ b/src/ArgParser.hpp
@@ -3,6 +3,7 @@
 
 #include "Constraints.hpp"
 #include "EncodingHelper.hpp"
+#include "ParserHelper.hpp"
 #include <functional>
 #include <vector>
 #include <map>
@@ -18,17 +19,26 @@ namespace YYCC::ArgParser {
 #endif
 	private:
 		ArgumentList(std::vector<yycc_u8string>&& arguments);
+	public:
+		ArgumentList(const ArgumentList&) = default;
+		ArgumentList& operator=(const ArgumentList&) = default;
+		ArgumentList(ArgumentList&&) = default;
+		ArgumentList& operator=(ArgumentList&&) = default;
 
 	public:
 		void Prev();
 		void Next();
+		const yycc_u8string& Current() const;
 		bool IsSwitch(
 			bool* is_long_name = nullptr,
-			yycc_u8string_view* long_name = nullptr,
+			yycc_u8string* long_name = nullptr,
 			yycc_char8_t* short_name = nullptr) const;
-		bool IsValue() const;
+		bool IsValue(yycc_u8string* val = nullptr) const;
 		bool IsEOF() const;
 		void Reset();
+	private:
+		bool IsLongNameSwitch(yycc_u8string* name_part = nullptr) const;
+		bool IsShortNameSwitch(yycc_char8_t* name_part = nullptr) const;
 
 	private:
 		std::vector<yycc_u8string> m_Arguments;
@@ -37,12 +47,18 @@ namespace YYCC::ArgParser {
 
 	class AbstractArgument {
 		friend class OptionContext;
+
+		// Long name and short name constants and checker.
 	public:
 		static const yycc_u8string DOUBLE_DASH;
 		static const yycc_char8_t DASH;
 		static const yycc_char8_t NO_SHORT_NAME;
 		static const yycc_char8_t MIN_SHORT_NAME;
 		static const yycc_char8_t MAX_SHORT_NAME;
+		static bool IsLegalShortName(yycc_char8_t short_name);
+		static bool IsLegalLongName(const yycc_u8string_view& long_name);
+
+		// Constructor & destructor
 	public:
 		AbstractArgument(
 			const yycc_char8_t* long_name, yycc_char8_t short_name = AbstractArgument::NO_SHORT_NAME,
@@ -86,7 +102,7 @@ namespace YYCC::ArgParser {
 		~OptionContext();
 
 	public:
-		bool Parse(ArgumentList* al);
+		bool Parse(ArgumentList& al);
 		void Reset();
 
 	private:
@@ -118,8 +134,25 @@ namespace YYCC::ArgParser {
 		}
 
 	protected:
-		virtual bool Parse(ArgumentList& al) override {} // todo
-		virtual void Reset() override {}// todo
+		virtual bool Parse(ArgumentList& al) override {
+			// try get corresponding value
+			yycc_u8string strval;
+			al.Next();
+			if (al.IsEOF() || !al.IsValue(&strval)) {
+				al.Prev();
+				return false;
+			}
+			// try parsing value
+			if (!YYCC::ParserHelper::TryParse<_Ty>(strval, m_Data)) return false;
+			// check constraint
+			if (m_Constraint.IsValid() && !m_Constraint.m_CheckFct(m_Data))
+				return false;
+			// okey
+			return true;
+		}
+		virtual void Reset() override {
+			std::memset(&m_Data, 0, sizeof(m_Data));
+		}
 
 	protected:
 		_Ty m_Data;
@@ -138,7 +171,10 @@ namespace YYCC::ArgParser {
 		bool Get() const { return m_Data; }
 
 	protected:
-		virtual bool Parse(ArgumentList& al) override { m_Data = true; }
+		virtual bool Parse(ArgumentList& al) override { 
+			m_Data = true;
+			return true;
+		}
 		virtual void Reset() override { m_Data = false; }
 
 	protected:
@@ -151,7 +187,7 @@ namespace YYCC::ArgParser {
 			const yycc_char8_t* long_name, yycc_char8_t short_name,
 			const yycc_char8_t* description = nullptr, const yycc_char8_t* argument_example = nullptr,
 			bool is_optional = false,
-			Constraints::Constraint<yycc_u8string_view> constraint = Constraints::Constraint<yycc_u8string_view> {}) :
+			Constraints::Constraint<yycc_u8string> constraint = Constraints::Constraint<yycc_u8string> {}) :
 			AbstractArgument(long_name, short_name, description, argument_example, is_optional), m_Data(), m_Constraint(constraint) {}
 		virtual ~StringArgument() {}
 
@@ -162,12 +198,26 @@ namespace YYCC::ArgParser {
 		}
 
 	protected:
-		virtual bool Parse(ArgumentList& al) override {} // todo
-		virtual void Reset() override {}// todo
+		virtual bool Parse(ArgumentList& al) override {
+			// try get corresponding value
+			al.Next();
+			if (al.IsEOF() || !al.IsValue(&m_Data)) {
+				al.Prev();
+				return false;
+			}
+			// check constraint
+			if (m_Constraint.IsValid() && !m_Constraint.m_CheckFct(m_Data))
+				return false;
+			// okey
+			return true;
+		}
+		virtual void Reset() override {
+			m_Data.clear();
+		}
 
 	protected:
 		yycc_u8string m_Data;
-		Constraints::Constraint<yycc_u8string_view> m_Constraint;
+		Constraints::Constraint<yycc_u8string> m_Constraint;
 	};
 
 #pragma endregion
diff --git a/src/ConfigManager.hpp b/src/ConfigManager.hpp
index f39edc0..b5ed94c 100644
--- a/src/ConfigManager.hpp
+++ b/src/ConfigManager.hpp
@@ -185,7 +185,7 @@ namespace YYCC::ConfigManager {
 		*/
 		StringSetting(
 			const yycc_char8_t* name, const yycc_u8string_view& default_value,
-			Constraints::Constraint<yycc_u8string_view> constraint = Constraints::Constraint<yycc_u8string_view> {}) :
+			Constraints::Constraint<yycc_u8string> constraint = Constraints::Constraint<yycc_u8string> {}) :
 			AbstractSetting(name), m_Data(), m_DefaultData(), m_Constraint(constraint) {
 			m_Data = default_value;
 			m_DefaultData = default_value;
@@ -201,10 +201,11 @@ namespace YYCC::ConfigManager {
 		*/
 		bool Set(const yycc_u8string_view& new_data) {
 			// check data validation
-			if (m_Constraint.IsValid() && !m_Constraint.m_CheckFct(new_data))
+			yycc_u8string new_data_cache(new_data);
+			if (m_Constraint.IsValid() && !m_Constraint.m_CheckFct(new_data_cache))
 				return false;
 			// assign data
-			m_Data = new_data;
+			m_Data = std::move(new_data_cache);
 			return true;
 		}
 
@@ -244,7 +245,7 @@ namespace YYCC::ConfigManager {
 		}
 
 		yycc_u8string m_Data, m_DefaultData;
-		Constraints::Constraint<yycc_u8string_view> m_Constraint;
+		Constraints::Constraint<yycc_u8string> m_Constraint;
 	};
 
 #pragma endregion
diff --git a/src/Constraints.hpp b/src/Constraints.hpp
index 02323ba..d78961a 100644
--- a/src/Constraints.hpp
+++ b/src/Constraints.hpp
@@ -73,10 +73,10 @@ namespace YYCC::Constraints {
 	 * Caller must make sure that the string view passed in initializer list is valid until this Constraint life time gone.
 	 * Becasue this generator will not copy your given string view into string.
 	*/
-	Constraint<yycc_u8string_view> GetStringEnumerationConstraint(const std::initializer_list<yycc_u8string_view>& il) {
+	inline Constraint<yycc_u8string> GetStringEnumerationConstraint(const std::initializer_list<yycc_u8string_view>& il) {
 		std::set<yycc_u8string_view> data(il);
-		return Constraint<yycc_u8string_view> {
-			[data](const yycc_u8string_view& val) -> bool { return data.find(val) != data.end(); }
+		return Constraint<yycc_u8string> {
+			[data](const yycc_u8string& val) -> bool { return data.find(yycc_u8string_view(val)) != data.end(); }
 		};
 	}
 
diff --git a/src/YYCCommonplace.hpp b/src/YYCCommonplace.hpp
index 3a4f5a2..d4591e9 100644
--- a/src/YYCCommonplace.hpp
+++ b/src/YYCCommonplace.hpp
@@ -14,3 +14,4 @@
 #include "ExceptionHelper.hpp"
 
 #include "ConfigManager.hpp"
+#include "ArgParser.hpp"
diff --git a/testbench/main.cpp b/testbench/main.cpp
index ec26d5c..a9aaca8 100644
--- a/testbench/main.cpp
+++ b/testbench/main.cpp
@@ -391,12 +391,12 @@ namespace YYCCTestbench {
 
 	}
 
+	enum class TestEnum : int8_t {
+		Test1, Test2, Test3
+	};
+
 	class TestConfigManager {
 	public:
-		enum class TestEnum : int8_t {
-			Test1, Test2, Test3
-		};
-
 		TestConfigManager() :
 			m_IntSetting(YYCC_U8("int-setting"), INT32_C(0)),
 			m_FloatSetting(YYCC_U8("float-setting"), 0.0f),
@@ -406,8 +406,7 @@ namespace YYCCTestbench {
 			m_EnumSetting(YYCC_U8("enum-setting"), TestEnum::Test1),
 			m_CoreManager(YYCC_U8("test.cfg"), UINT64_C(0), {
 				&m_IntSetting, &m_FloatSetting, &m_StringSetting, &m_BoolSetting, &m_ClampedFloatSetting, &m_EnumSetting
-			})
-		{}
+			}) {}
 		~TestConfigManager() {}
 
 		void PrintSettings() {
@@ -452,10 +451,10 @@ namespace YYCCTestbench {
 		TEST_MACRO(m_StringSetting, YYCC_U8("fuck"));
 		TEST_MACRO(m_BoolSetting, true);
 		TEST_MACRO(m_ClampedFloatSetting, 0.5f);
-		TEST_MACRO(m_EnumSetting, TestConfigManager::TestEnum::Test2);
+		TEST_MACRO(m_EnumSetting, TestEnum::Test2);
 
 #undef TEST_MACRO
-		
+
 		// test save
 		test.PrintSettings();
 		Assert(test.m_CoreManager.Save(), YYCC_U8("YYCC::ConfigManager::CoreManager::Save"));
@@ -468,7 +467,7 @@ namespace YYCCTestbench {
 		Assert(test.m_StringSetting.Get() == YYCC_U8(""), YYCC_U8("YYCC::ConfigManager::CoreManager::Reset"));
 		Assert(test.m_BoolSetting.Get() == false, YYCC_U8("YYCC::ConfigManager::CoreManager::Reset"));
 		Assert(test.m_ClampedFloatSetting.Get() == 0.0f, YYCC_U8("YYCC::ConfigManager::CoreManager::Reset"));
-		Assert(test.m_EnumSetting.Get() == TestConfigManager::TestEnum::Test1, YYCC_U8("YYCC::ConfigManager::CoreManager::Reset"));
+		Assert(test.m_EnumSetting.Get() == TestEnum::Test1, YYCC_U8("YYCC::ConfigManager::CoreManager::Reset"));
 
 		// test load
 		Assert(test.m_CoreManager.Load(), YYCC_U8("YYCC::ConfigManager::CoreManager::Load"));
@@ -478,13 +477,117 @@ namespace YYCCTestbench {
 		Assert(test.m_StringSetting.Get() == YYCC_U8("fuck"), YYCC_U8("YYCC::ConfigManager::CoreManager::Load"));
 		Assert(test.m_BoolSetting.Get() == true, YYCC_U8("YYCC::ConfigManager::CoreManager::Load"));
 		Assert(test.m_ClampedFloatSetting.Get() == 0.5f, YYCC_U8("YYCC::ConfigManager::CoreManager::Load"));
-		Assert(test.m_EnumSetting.Get() == TestConfigManager::TestEnum::Test2, YYCC_U8("YYCC::ConfigManager::CoreManager::Load"));
-		
+		Assert(test.m_EnumSetting.Get() == TestEnum::Test2, YYCC_U8("YYCC::ConfigManager::CoreManager::Load"));
+
+	}
+
+	class TestArgParser {
+	public:
+		TestArgParser() :
+			m_IntArgument(YYCC_U8("int"), YYCC_U8_CHAR('i'), YYCC_U8("integral argument"), YYCC_U8("114514")),
+			m_FloatArgument(nullptr, YYCC_U8_CHAR('f'), nullptr, nullptr, true),
+			m_StringArgument(YYCC_U8("string"), YYCC::ArgParser::AbstractArgument::NO_SHORT_NAME, nullptr, nullptr, true),
+			m_BoolArgument(nullptr, YYCC_U8_CHAR('b'), nullptr, nullptr),
+			m_ClampedFloatArgument(YYCC_U8("clamped-float"), YYCC::ArgParser::AbstractArgument::NO_SHORT_NAME, nullptr, nullptr, true, YYCC::Constraints::GetMinMaxRangeConstraint<float>(-1.0f, 1.0f)),
+			m_OptionContext(YYCC_U8("TestArgParser"), YYCC_U8("This is the testbench of argument parser."), {
+				&m_IntArgument, &m_FloatArgument, &m_StringArgument,
+				&m_BoolArgument, &m_ClampedFloatArgument
+			}) {}
+		~TestArgParser() {}
+
+		YYCC::ArgParser::NumberArgument<int32_t> m_IntArgument;
+		YYCC::ArgParser::NumberArgument<float> m_FloatArgument;
+		YYCC::ArgParser::StringArgument m_StringArgument;
+
+		YYCC::ArgParser::SwitchArgument m_BoolArgument;
+		YYCC::ArgParser::NumberArgument<float> m_ClampedFloatArgument;
+
+		YYCC::ArgParser::OptionContext m_OptionContext;
+	};
+
+	static void ArgParserTestbench(int argc, char* argv[]) {
+		// test command line getter
+		{
+			YYCC::ConsoleHelper::WriteLine(YYCC_U8("YYCC::ArgParser::ArgumentList::CreateFromStd"));
+			auto result = YYCC::ArgParser::ArgumentList::CreateFromStd(argc, argv);
+			for (result.Reset(); !result.IsEOF(); result.Next()) {
+				YYCC::ConsoleHelper::FormatLine(YYCC_U8("\t%s"), result.Current().c_str());
+			}
+		}
+#if YYCC_OS == YYCC_OS_WINDOWS
+		{
+			YYCC::ConsoleHelper::WriteLine(YYCC_U8("YYCC::ArgParser::ArgumentList::CreateFromWin32"));
+			auto result = YYCC::ArgParser::ArgumentList::CreateFromWin32();
+			for (result.Reset(); !result.IsEOF(); result.Next()) {
+				YYCC::ConsoleHelper::FormatLine(YYCC_U8("\t%s"), result.Current().c_str());
+			}
+		}
+#endif
+
+		// test option context
+		// init option context
+		TestArgParser test;
+
+#define PREPARE_DATA(...) char* test_argv[] = { __VA_ARGS__ }; \
+auto al = YYCC::ArgParser::ArgumentList::CreateFromStd(sizeof(test_argv) / sizeof(char*), test_argv);
+
+		// normal test
+		{
+			PREPARE_DATA("exec", "-i", "114514");
+			Assert(test.m_OptionContext.Parse(al), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			Assert(test.m_IntArgument.IsCaptured() && test.m_IntArgument.Get() == UINT32_C(114514), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			Assert(!test.m_BoolArgument.Get(), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			test.m_OptionContext.Reset();
+		}
+		// no argument
+		{
+			PREPARE_DATA("exec");
+			Assert(!test.m_OptionContext.Parse(al), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			test.m_OptionContext.Reset();
+		}
+		// error argument
+		{
+			PREPARE_DATA("exec", "-?", "114514");
+			Assert(!test.m_OptionContext.Parse(al), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			test.m_OptionContext.Reset();
+		}
+		// lost argument
+		{
+			PREPARE_DATA("exec", "-i");
+			Assert(!test.m_OptionContext.Parse(al), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			test.m_OptionContext.Reset();
+		}
+		// extra useless argument
+		{
+			PREPARE_DATA("exec", "-i", "114514" "1919810");
+			Assert(!test.m_OptionContext.Parse(al), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			test.m_OptionContext.Reset();
+		}
+		// invalid clamp argument
+		{
+			PREPARE_DATA("exec", "-i", "114514", "--clamped-float", "114.0");
+			Assert(!test.m_OptionContext.Parse(al), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			test.m_OptionContext.Reset();
+		}
+		// full argument
+		{
+			PREPARE_DATA("exec", "-i", "114514", "-f", "2.0", "--string", "fuck", "-b", "--clamped-float", "0.5");
+			Assert(test.m_OptionContext.Parse(al), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			Assert(test.m_IntArgument.IsCaptured() && test.m_IntArgument.Get() == UINT32_C(114514), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			Assert(test.m_FloatArgument.IsCaptured() && test.m_FloatArgument.Get() == 2.0f, YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			Assert(test.m_StringArgument.IsCaptured() && test.m_StringArgument.Get() == YYCC_U8("fuck"), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			Assert(test.m_BoolArgument.IsCaptured() && test.m_BoolArgument.Get(), YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			Assert(test.m_ClampedFloatArgument.IsCaptured() && test.m_ClampedFloatArgument.Get() == 0.5f, YYCC_U8("YYCC::ArgParser::OptionContext::Parse"));
+			test.m_OptionContext.Reset();
+		}
+
+#undef PREPARE_DATA
+
 	}
 
 }
 
-int main(int argc, char** args) {
+int main(int argc, char* argv[]) {
 	// common testbench
 	// normal
 	YYCCTestbench::EncodingTestbench();
@@ -494,6 +597,7 @@ int main(int argc, char** args) {
 	YYCCTestbench::FsPathPatch();
 	// advanced
 	YYCCTestbench::ConfigManagerTestbench();
+	YYCCTestbench::ArgParserTestbench(argc, argv);
 
 	// testbench which may terminal app or ordering input
 	YYCCTestbench::ConsoleTestbench();