Use char8_t with fmtlib

src/bot/base_commands.cpp

@@ -24,37 +24,38 @@ namespace jessibot {
 namespace io {
 
 using namespace jessilib::io;
+using namespace std::literals;
 
 command quit_command{ [](command_context& context) {
 	using namespace jessilib::io;
-	text quit_text{ "Closing jessibot", text::property::bold, color{ 0xFF0000 } }; // TODO: localize
+	text quit_text{ u8"Closing jessibot", text::property::bold, color{ 0xFF0000 } }; // TODO: localize
-	context.publicReply(formatted_message{ "{}", quit_text });
+	context.publicReply(formatted_message{ u8"{}", quit_text });
 	notify_shutdown();
-}, "quit" };
+}, u8"quit" };
 
 // ISSUE: help command has no way to know what commands exist for the given context
 command help_command{ [](command_context& context) {
 	auto details = context.details();
-	auto table_name = details["table"].get<std::string>();
+	auto table_name = details[u8"table"s].get<std::u8string>();
 
 	if (table_name.empty()) {
-		text error_text{ "ERROR", text::property::bold, color{ 0xFF0000 } }; // TODO: localize
+		text error_text{ u8"ERROR", text::property::bold, color{ 0xFF0000 } }; // TODO: localize
-		context.publicReply(formatted_message{ "{} command context is missing permission table name", error_text });
+		context.publicReply(formatted_message{ u8"{} command context is missing permission table name", error_text });
 		return;
 	}
 
 	// table examples: "console", "irc", "irc+", "irc%", "irc@"; should table instead be 'tables'?
 
 	text table_text{ table_name, text::property::bold, color{ 0x0000FF } };
-	context.publicReply(formatted_message{ "Commands for table '{}':", table_text });
+	context.publicReply(formatted_message{ u8"Commands for table '{}':", table_text });
 
 	// TODO: read some permission table and filter commands based upon permission and context information
 	const command_manager& manager = command_manager::instance();
 	manager.foreach([&context](basic_command* in_command) {
-		context.publicReply(formatted_message{ "{}", in_command->label() });
+		context.publicReply(formatted_message{ u8"{}", in_command->label() });
 		return true;
 	});
-}, "help" };
+}, u8"help" };
 
 } // namespace io
 } // namespace jessibot

src/bot/console/console.cpp

@@ -30,16 +30,16 @@ namespace io {
 void console_input_loop() {
 	using namespace jessilib::io;
 
-	std::string input;
+	std::wstring input;
 	auto shutdown_future = get_shutdown_future();
 	while (shutdown_future.wait_for(std::chrono::milliseconds(10)) != std::future_status::ready) {
-		std::getline(std::cin, input); // TODO: use a non-bloicking call and poll running periodically
+		std::getline(std::wcin, input); // TODO: use a non-bloicking call and poll running periodically?
-		jessibot::io::console_command_context context{ input };
+		jessibot::io::console_command_context context{ jessilib::string_cast<char8_t>(input) };
 		if (!command_manager::instance().execute_command(context)) {
-			text error_text{ "ERROR", text::property::bold, color{ 0xFF0000 }};
+			text error_text{ u8"ERROR", text::property::bold, color{ 0xFF0000 }};
 			text keyword_text{ context.keyword(), text::property::bold, color{ 0x0000FF }};
-			auto result = process_message<ansi::text_wrapper>(formatted_message{"{} Command \"{}\" not found", error_text, keyword_text});
+			auto result = process_message<ansi::text_wrapper>(formatted_message{u8"{} Command \"{}\" not found", error_text, keyword_text});
-			std::cout << result << std::endl;
+			std::wcout << jessilib::string_cast<wchar_t>(result) << std::endl;
 		}
 	}
 }

src/bot/console/console_command_context.cpp

@@ -27,7 +27,9 @@ namespace io {
 /** Reply */
 bool console_command_context::privateReply(const jessilib::io::formatted_message& in_message) {
 	auto result = jessilib::io::process_message<jessilib::io::ansi::text_wrapper>(in_message);
-	std::cout << result << std::endl;
+	// TODO check locale before printing to see if console is using UTF-8; if so we can just chuck this straight to cout
+	// instead of leveraging to wchar_t
+	std::wcout << jessilib::string_cast<wchar_t>(result) << std::endl;
 	return true;
 }
 
@@ -39,13 +41,13 @@ bool console_command_context::publicReply(const jessilib::io::formatted_message&
 /** Additional contextual details */
 jessilib::object console_command_context::details() const {
 	static jessilib::object s_details {
-		jessilib::object::map_type{ { "table", "console" } }
+		jessilib::object::map_type{ { u8"table", u8"console" } }
 	};
 
 	return s_details;
 }
 
-std::string console_command_context::getText(std::string_view tag) const {
+std::u8string console_command_context::getText(std::u8string_view tag) const {
 	return { tag.begin(), tag.end() }; // TODO: implement properly
 }
 

src/bot/console/console_command_context.hpp

@@ -33,7 +33,7 @@ public:
 
 	/** Additional contextual details */
 	jessilib::object details() const override;
-	std::string getText(std::string_view tag) const override;
+	std::u8string getText(std::u8string_view tag) const override;
 }; // class console_command_context
 
 } // namespace io

src/bot/main.cpp

@@ -24,7 +24,7 @@
 int main(int argc, char** argv) {
 	jessilib::app_parameters parameters{ argc, argv };
 
-	if (parameters.has_switch("echoParameters")) {
+	if (parameters.has_switch(u8"echoParameters")) {
 		// TODO: Write pretty JSON serializer based on JSON serializer
 		std::cout << std::endl << jessilib::json_parser{}.serialize(parameters) << std::endl;
 	}

src/common/app_parameters.cpp

@@ -17,57 +17,77 @@
  */
 
 #include "app_parameters.hpp"
-#include "jessilib/unicode.hpp"
+#include "split.hpp"
-#include "jessilib/split.hpp"
+#include "assert.hpp"
 
 namespace jessilib {
 
-app_parameters::app_parameters(int, char** in_argv, char** in_envp)
+app_parameters::set_type app_parameters::default_stop_args() {
-	: app_parameters{ vectorize_ntargs(in_argv), vectorize_ntargs(in_envp) } {
+	using namespace std::literals;
-	// Empty ctor body
+	return { u8"--"sv };
+}
+
+template<typename CharT>
+app_parameters::string_type get_first_arg(CharT** in_argv) {
+	if (in_argv == nullptr) {
+		return {};
+	}
+
+	return ntarg_cast<char8_t, CharT>(*in_argv);
+}
+
+template<typename CharT>
+CharT** get_next_args(CharT** in_argv) {
+	if (in_argv == nullptr) {
+		return nullptr;
+	}
+
+	if (*in_argv == nullptr) {
+		return nullptr;
+	}
+
+	return in_argv + 1;
 }
 
-app_parameters::app_parameters(int, const char** in_argv, const char** in_envp)
+app_parameters::app_parameters(int, char** in_argv, char** in_envp, const set_type& in_stop_args)
-	: app_parameters{ vectorize_ntargs(in_argv), vectorize_ntargs(in_envp) } {
+	: app_parameters{ get_first_arg(in_argv), vectorize_ntargs(get_next_args(in_argv)), vectorize_ntargs(in_envp), in_stop_args } {
 	// Empty ctor body
 }
 
-app_parameters::app_parameters(int, wchar_t** in_argv, wchar_t** in_envp)
+app_parameters::app_parameters(int, const char** in_argv, const char** in_envp, const set_type& in_stop_args)
-	: app_parameters{ vectorize_ntargs(in_argv), vectorize_ntargs(in_envp) } {
+	: app_parameters{ get_first_arg(in_argv), vectorize_ntargs(get_next_args(in_argv)), vectorize_ntargs(in_envp), in_stop_args } {
 	// Empty ctor body
 }
 
-app_parameters::app_parameters(int, const wchar_t** in_argv, const wchar_t** in_envp)
+app_parameters::app_parameters(int, wchar_t** in_argv, wchar_t** in_envp, const set_type& in_stop_args)
-	: app_parameters{ vectorize_ntargs(in_argv), vectorize_ntargs(in_envp) } {
+	: app_parameters{ get_first_arg(in_argv), vectorize_ntargs(get_next_args(in_argv)), vectorize_ntargs(in_envp), in_stop_args } {
 	// Empty ctor body
 }
 
-#ifdef __cpp_lib_generic_unordered_lookup
+app_parameters::app_parameters(int, const wchar_t** in_argv, const wchar_t** in_envp, const set_type& in_stop_args)
-#define WRAP_MAP_KEY(in_key) in_key
+	: app_parameters{ get_first_arg(in_argv), vectorize_ntargs(get_next_args(in_argv)), vectorize_ntargs(in_envp), in_stop_args } {
-#else // We can't use std::string_view for InKeyType until GCC 11 & clang 12, and I still want to support GCC 9
+	// Empty ctor body
-#define WRAP_MAP_KEY(in_key) static_cast<string_type>(in_key)
+}
-#endif // __cpp_lib_generic_unordered_lookup
 
 bool app_parameters::has_switch(string_view_type in_switch) const {
-	return m_switches_set.find(WRAP_MAP_KEY(in_switch)) != m_switches_set.end();
+	return m_switches_set.find(in_switch) != m_switches_set.end();
 }
 
-app_parameters::app_parameters(std::vector<string_type> in_args, std::vector<string_type> in_env) {
+app_parameters::app_parameters(string_type in_name, std::vector<string_type> in_args, std::vector<string_type> in_env, const set_type& in_stop_args)
+	: m_name{ std::move(in_name) }, m_args{ std::move(in_args) }, m_env{ std::move(in_env) } {
+	m_env_values.reserve(m_env.size());
+
 	// Parse in environment variables first to ensure they're parsed before the early-out
-	for (const auto& env : in_env) {
+	for (const auto& env : m_env) {
-		auto split = jessilib::split_once(env, u8'=');
+		auto split = jessilib::split_once_view(env, u8'=');
-		m_values[split.first] = split.second;
+		m_env_values[split.first] = split.second;
-		m_env_values[split.first] = std::move(split.second);
 	}
 
 	// Sanity safety check; should never happen
-	if (in_args.empty()) {
+	if (m_args.empty()) {
 		return;
 	}
 
-	// Populate path
-	m_path = in_args[0];
-
 	// Process args
 	string_view_type key;
 	string_type value;
@@ -78,50 +98,63 @@ app_parameters::app_parameters(std::vector<string_type> in_args, std::vector<str
 				m_switches.emplace_back(key);
 			}
 			else {
-				string_type key_str{ key };
+				m_arg_values[key] = std::move(value);
-				m_values[key_str] = value;
-				m_arg_values[key_str] = std::move(value);
 				value.clear();
 			}
 		}
+		else {
+			jessilib_debug_assert(m_precedent.empty()); // m_precedent should always be empty when key is empty
+			// This key start marks the end of the precedent
+			m_precedent = std::move(value);
+			value.clear();
+		}
 	};
 
-	for (size_t index = 1; index < in_args.size(); ++index) {
+	for (auto itr = m_args.begin(); itr != m_args.end(); ++itr) {
-		const string_type& arg = in_args[index];
+		const string_type& arg = *itr;
-		if (!arg.empty()) {
+		if (arg.empty()) {
-			// Check if this is a key or value
+			continue;
-			if (arg.front() == '-') {
+		}
-				// Flush pending value (if any)
+
-				flush_value();
+		// Check if argument is a parse stopper
+		if (in_stop_args.find(arg) != in_stop_args.end()) {
+			// Copy remaining args to m_passthrough
+			m_passthrough = arg;
+			while (++itr != m_args.end()) {
+				m_passthrough += u8' ';
+				m_passthrough += *itr;
+			}
+			break;
+		}
+
+		// Check if this is a key or value
+		if (arg.front() == u8'-') {
+			// Flush pending value (if any)
+			flush_value();
 
-				// Strip any leading '-' or '--' and set key
+			// Strip any leading '-' or '--' and set key
-				key = arg;
+			key = arg;
+			key.remove_prefix(1);
+			if (key.front() == u8'-') {
 				key.remove_prefix(1);
-				if (key.front() == '-') {
-					key.remove_prefix(1);
-				}
-
-				// Parse key for any value denominator ('=')
-				size_t key_end = key.find('=');
-				if (key_end != string_view_type::npos) {
-					// arg contains start of a value
-					value = key.substr(key_end + 1);
-					key = key.substr(0, key_end);
-				}
 			}
-			else {
-				// This is part of a value; add it
-				if (!value.empty()) {
-					value += ' ';
-				}
 
-				value += arg;
+			// Parse key for any value delimiter ('=')
+			size_t key_end = key.find(u8'=');
+			if (key_end != string_view_type::npos) {
+				// arg contains start of a value
+				value = key.substr(key_end + 1);
+				key = key.substr(0, key_end);
 			}
 		}
-		// else // empty string encountered
+		else {
+			// This is part of a value; add it
+			if (!value.empty()) {
+				value += u8' ';
+			}
 
-		// Push arg
+			value += arg;
-		m_args.emplace_back(arg);
+		}
 	}
 
 	// Flush any pending switch/value
@@ -131,15 +164,27 @@ app_parameters::app_parameters(std::vector<string_type> in_args, std::vector<str
 	m_switches_set = { m_switches.begin(), m_switches.end() };
 }
 
-app_parameters::string_view_type app_parameters::path() const {
+const app_parameters::string_type& app_parameters::name() const {
-	return m_path;
+	return m_name;
 }
 
 const std::vector<app_parameters::string_type>& app_parameters::arguments() const {
 	return m_args;
 }
 
-const std::vector<app_parameters::string_type>& app_parameters::switches() const {
+const std::vector<app_parameters::string_type>& app_parameters::environment() const {
+	return m_env;
+}
+
+const app_parameters::string_type& app_parameters::precedent() const {
+	return m_precedent;
+}
+
+const app_parameters::string_type& app_parameters::passthrough() const {
+	return m_passthrough;
+}
+
+const std::vector<app_parameters::string_view_type>& app_parameters::switches() const {
 	return m_switches;
 }
 
@@ -151,36 +196,47 @@ const app_parameters::map_type& app_parameters::arg_values() const {
 	return m_arg_values;
 }
 
-const app_parameters::map_type& app_parameters::env_values() const {
+const app_parameters::light_map_type& app_parameters::env_values() const {
 	return m_env_values;
 }
 
-const app_parameters::map_type& app_parameters::values() const {
+app_parameters::light_map_type app_parameters::values() const {
-	return m_values;
+	app_parameters::light_map_type result;
+
+	for (const auto& key_value : m_env_values) {
+		result[key_value.first] = key_value.second;
+	}
+
+	for (const auto& key_value : m_arg_values) {
+		result[key_value.first] = key_value.second;
+	}
+
+	return result;
 }
 
 object app_parameters::as_object() const {
 	using namespace std::literals;
 
 	// Null check
-	if (m_path.empty()
+	if (m_name.empty()
 		&& m_args.empty()) {
 		// app_parameters is null; return a null object
 		return object{};
 	}
 
 	return std::map<string_type, object>{
-		{ u8"Path"s, m_path },
+		{ u8"Name"s, m_name },
+		{ u8"Env"s, m_env },
 		{ u8"Args"s, m_args },
 		{ u8"Switches"s, m_switches },
 		{ u8"ArgValues"s, m_arg_values },
 		{ u8"EnvValues"s, m_env_values },
-		{ u8"Values"s, m_values }
+		{ u8"Values"s, values() }
 	};
 }
 
 app_parameters::string_view_type app_parameters::get_arg_value(string_view_type in_key, string_view_type in_default) const {
-	auto result = m_arg_values.find(WRAP_MAP_KEY(in_key));
+	auto result = m_arg_values.find(in_key);
 
 	// Safety check
 	if (result == m_arg_values.end()) {
@@ -191,7 +247,7 @@ app_parameters::string_view_type app_parameters::get_arg_value(string_view_type
 }
 
 app_parameters::string_view_type app_parameters::get_env_value(string_view_type in_key, string_view_type in_default) const {
-	auto result = m_env_values.find(WRAP_MAP_KEY(in_key));
+	auto result = m_env_values.find(in_key);
 
 	// Safety check
 	if (result == m_env_values.end()) {
@@ -202,14 +258,14 @@ app_parameters::string_view_type app_parameters::get_env_value(string_view_type
 }
 
 app_parameters::string_view_type app_parameters::get_value(string_view_type in_key, string_view_type in_default) const {
-	auto result = m_values.find(WRAP_MAP_KEY(in_key));
+	// Try args first
-
+	auto result = m_arg_values.find(in_key);
-	// Safety check
+	if (result != m_arg_values.end()) {
-	if (result == m_values.end()) {
+		return result->second;
-		return in_default;
 	}
 
-	return result->second;
+	// Fallback to trying env
+	return get_env_value(in_key, in_default);
 }
 
 } // namespace jessilib

src/common/io/command.cpp

@@ -22,7 +22,7 @@
 namespace jessilib {
 namespace io {
 
-command::command(callback_t in_callback, std::string_view in_label)
+command::command(callback_t in_callback, std::u8string_view in_label)
 	: m_callback{ std::move(in_callback) },
 	m_label{ std::move(in_label) } {
 	// Register command
@@ -34,7 +34,7 @@ command::~command() {
 	command_manager::instance().unregister_command(*this);
 }
 
-std::string_view command::label() const {
+std::u8string_view command::label() const {
 	return m_label;
 }
 
@@ -44,7 +44,7 @@ void command::execute(command_context& in_context) const {
 
 command test_command{ [](command_context&) {
 	// do stuff
-}, "test" };
+}, u8"test" };
 
 } // namespace io
 } // namespace jessilib

src/common/io/command_context.cpp

@@ -21,52 +21,54 @@
 namespace jessilib {
 namespace io {
 
-command_context::command_context(std::string_view in_input)
+command_context::command_context(string_type in_input)
-	: m_input{ in_input } {
+	: m_input{ std::move(in_input) } {
+	std::u8string_view input_view = m_input;
+
 	// Strip leading whitespace
-	std::size_t pos = in_input.find_first_not_of(' ');
+	std::size_t pos = input_view.find_first_not_of(u8' ');
 	if (pos != std::string_view::npos) {
-		in_input.remove_prefix(pos);
+		input_view.remove_prefix(pos);
 
 		// Whitespace is stripped; parse keyword from input
-		pos = in_input.find(' ');
+		pos = input_view.find(u8' ');
 		if (pos == std::string_view::npos) {
-			pos = in_input.size();
+			pos = input_view.size();
 		}
-		m_keyword = in_input.substr(0, pos);
+		m_keyword = input_view.substr(0, pos);
-		in_input.remove_prefix(pos);
+		input_view.remove_prefix(pos);
 
 		// Strip leading whitespace and parse parameter from remaining input
-		pos = in_input.find_first_not_of(' ');
+		pos = input_view.find_first_not_of(u8' ');
 		if (pos != std::string_view::npos) {
-			in_input.remove_prefix(pos);
+			input_view.remove_prefix(pos);
-			m_parameter = in_input;
+			m_parameter = input_view;
 		}
 	}
 }
 
-command_context::command_context(std::string_view in_input, std::string_view in_keyword, std::string_view in_parameter)
+command_context::command_context(string_type in_input, string_type in_keyword, string_type in_parameter)
 	: m_input{ std::move(in_input) },
 	m_keyword{ std::move(in_keyword) },
 	m_parameter{ std::move(in_parameter) } {
 	// Empty ctor body
 }
 
-std::string_view command_context::input() const {
+const command_context::string_type& command_context::input() const {
 	return m_input;
 }
 
-std::string_view command_context::keyword() const {
+const command_context::string_type& command_context::keyword() const {
 	return m_keyword;
 }
 
-std::string_view command_context::parameter() const {
+const command_context::string_type& command_context::parameter() const {
 	return m_parameter;
 }
 
-std::vector<std::string_view> command_context::paramaters() const {
+std::vector<std::u8string_view> command_context::paramaters() const {
-	std::vector<std::string_view> result;
+	std::vector<std::u8string_view> result;
-	std::string_view parameter = m_parameter;
+	std::u8string_view parameter = m_parameter;
 
 	// Strip leading whitespace
 	std::size_t pos = parameter.find_first_not_of(' ');

src/common/io/message.cpp

@@ -65,11 +65,11 @@ void text::set_color_bg(color in_color) {
 
 /** Text */
 
-const std::string& text::string() const {
+const std::u8string& text::string() const {
 	return m_string;
 }
 
-void text::set_string(std::string_view in_string) {
+void text::set_string(std::u8string_view in_string) {
 	m_string = in_string;
 }
 

src/external/fmt

@@ -1 +1 @@
-Subproject commit 812733cc963b2e1d96f6ad2cb2d441c6fe8e4a5b
+Subproject commit 9d5b9defde1334726d35c0d21b6225511ed3976e

src/include/jessilib/app_parameters.hpp

@@ -21,79 +21,119 @@
 
 namespace jessilib {
 
+/**
+ * Loosely structured application parameter parsing:
+ * /your/app [precedent] [switches & arguments] [passthrough = [stop arg] ...]
+ */
 class app_parameters {
 public:
 	using string_type = std::u8string;
 	using string_view_type = std::u8string_view;
-	using set_type = std::unordered_set<string_type, jessilib::text_hashi, jessilib::text_equali>;
+	using set_type = std::unordered_set<string_view_type>;
-	using map_type = std::unordered_map<string_type, string_type, jessilib::text_hashi, jessilib::text_equali>;
+	using map_type = std::unordered_map<string_view_type, string_type>;
-
+	using light_map_type = std::unordered_map<string_view_type, string_view_type>;
-	app_parameters(int in_argc, char** in_argv, char** in_envp = nullptr);
+	static set_type default_stop_args(); // "--" by default, but applications may wish to pass command names as well
-	app_parameters(int in_argc, const char** in_argv, const char** in_envp = nullptr);
+
-	app_parameters(int in_argc, wchar_t** in_argv, wchar_t** in_envp = nullptr);
+	/** Value constructors */
-	app_parameters(int in_argc, const wchar_t** in_argv, const wchar_t** in_envp = nullptr);
+	app_parameters(int in_argc, char** in_argv, char** in_envp = nullptr, const set_type& stop_args = default_stop_args());
-	app_parameters(std::vector<string_type> in_args, std::vector<string_type> in_env = {});
+	app_parameters(int in_argc, const char** in_argv, const char** in_envp = nullptr, const set_type& stop_args = default_stop_args());
-
+	app_parameters(int in_argc, wchar_t** in_argv, wchar_t** in_envp = nullptr, const set_type& stop_args = default_stop_args());
-	[[nodiscard]] string_view_type path() const;
+	app_parameters(int in_argc, const wchar_t** in_argv, const wchar_t** in_envp = nullptr, const set_type& stop_args = default_stop_args());
+	app_parameters(string_type in_name, std::vector<string_type> in_args, std::vector<string_type> in_env = {}, const set_type& stop_args = default_stop_args());
+
+	/** Standard constructors & assignment operators */
+	app_parameters() = default;
+
+	// all owning copies are in vector or map_type, neither of which invalidate pointers/references/etc on move
+	app_parameters(app_parameters&&) = default;
+	app_parameters& operator=(app_parameters&&) = default;
+
+	// Call app_parameters(in.name(), in.arguments(), in.environment(), in_stop_args) instead; we don't keep in_stop_args
+	app_parameters(const app_parameters&) = delete;
+	app_parameters& operator=(const app_parameters&) = delete;
+
+	/** Input getters */
+	[[nodiscard]] const string_type& name() const;
 	[[nodiscard]] const std::vector<string_type>& arguments() const;
+	[[nodiscard]] const std::vector<string_type>& environment() const;
 
-	[[nodiscard]] const std::vector<string_type>& switches() const;
+	/** Parsed data object getters */
+	[[nodiscard]] const string_type& precedent() const;
+	[[nodiscard]] const string_type& passthrough() const;
+	[[nodiscard]] const std::vector<string_view_type>& switches() const;
 	[[nodiscard]] const set_type& switches_set() const;
 	[[nodiscard]] const map_type& arg_values() const;
-	[[nodiscard]] const map_type& env_values() const;
+	[[nodiscard]] const light_map_type& env_values() const;
-	[[nodiscard]] const map_type& values() const;
+	[[nodiscard]] light_map_type values() const;
 	[[nodiscard]] jessilib::object as_object() const;
 
+	/** Parsed data value getters */
 	[[nodiscard]] bool has_switch(string_view_type in_switch) const;
 	[[nodiscard]] string_view_type get_arg_value(string_view_type in_key, string_view_type in_default = {}) const;
 	[[nodiscard]] string_view_type get_env_value(string_view_type in_key, string_view_type in_default = {}) const;
 	[[nodiscard]] string_view_type get_value(string_view_type in_key, string_view_type in_default = {}) const;
 
+	// TODO: assertive accessors for aliases with exceptions, i.e: get_unique_arg_value(...), get_one_switch(...)
+
+	/** Conversion */
 	[[nodiscard]] inline operator jessilib::object() const { return as_object(); }
 
 private:
-	string_type m_path;
+	string_type m_name;
-	std::vector<string_type> m_args;
+	std::vector<string_type> m_args, m_env; // owning vectors of arguments & environment variables passed to app_parameters
-	std::vector<string_type> m_switches;
+	string_type m_precedent; // non-owning vector of precedent arguments (i.e: text before switches/args)
-	set_type m_switches_set;
+	string_type m_passthrough; // non-owning vector of passthrough arguments
-	map_type m_arg_values;
+	std::vector<string_view_type> m_switches; // non-owning vector of switches
-	map_type m_env_values;
+	set_type m_switches_set; // non-owning set of switches set
-	map_type m_values;
+	map_type m_arg_values; // owning map of argument values
+	light_map_type m_env_values; // non-owning map of environment variables
 };
 
 /**
- * Converts null-terminated argument array of null-terminated strings to a vector of unicode strings
+ * Recodes a null-terminated multi-byte string to unicode
  *
- * @tparam OutCharT Unicode character data type
+ * @tparam OutCharT Unicode data unit type
- * @tparam InCharT Input character type (char for multi-byte string, or wchar_t for wide character strings)
+ * @tparam InCharT Character type for input multi-byte null-terminated string (char or const char)
- * @param in_ntarg_array Null-terminated argument array to vectorize
+ * @param in_ntarg Multi-byte null-terminated string to recode (may be nullptr)
- * @return A vector of unicode strings recoded from the input
+ * @return A unicode string equivalent to in_ntarg
  */
 template<typename OutCharT = char8_t, typename InCharT,
 	std::enable_if_t<std::is_same_v<std::remove_cvref_t<InCharT>, char>>* = nullptr>
-std::vector<std::basic_string<OutCharT>> vectorize_ntargs(InCharT** in_ntarg_array) {
+std::basic_string<OutCharT> ntarg_cast(InCharT* in_ntarg) {
-	std::vector<std::basic_string<OutCharT>> result;
+	if (in_ntarg == nullptr) {
-	if (in_ntarg_array == nullptr) {
+		return {};
-		return result;
 	}
 
-	for (auto argv = in_ntarg_array; *argv != nullptr; ++argv) {
+	return mbstring_to_ustring<OutCharT>(in_ntarg).second;
-		result.emplace_back(mbstring_to_ustring<OutCharT>(*argv).second);
+}
+
+/**
+ * Recodes a null-terminated wide character string to unicode
+ *
+ * @tparam OutCharT Unicode data unit type
+ * @tparam InCharT Character type for input wide character null-terminated string (wchar_t or const wchar_t)
+ * @param in_ntarg Wide character null-terminated string to recode (may be nullptr)
+ * @return A unicode string equivalent to in_ntarg
+ */
+template<typename OutCharT = char8_t, typename InCharT,
+	std::enable_if_t<std::is_same_v<std::remove_cvref_t<InCharT>, wchar_t>>* = nullptr>
+std::basic_string<OutCharT> ntarg_cast(InCharT* in_ntarg) {
+	if (in_ntarg == nullptr) {
+		return {};
 	}
 
-	return result;
+	return jessilib::string_cast<OutCharT>(std::wstring_view{ in_ntarg });
 }
 
 /**
  * Converts null-terminated argument array of null-terminated strings to a vector of unicode strings
  *
- * @tparam OutCharT Unicode character data type
+ * @tparam OutCharT Unicode data unit type
  * @tparam InCharT Input character type (char for multi-byte string, or wchar_t for wide character strings)
  * @param in_ntarg_array Null-terminated argument array to vectorize
  * @return A vector of unicode strings recoded from the input
  */
-template<typename OutCharT = char8_t, typename InCharT,
+template<typename OutCharT = char8_t, typename InCharT>
-	std::enable_if_t<std::is_same_v<std::remove_cvref_t<InCharT>, wchar_t>>* = nullptr>
 std::vector<std::basic_string<OutCharT>> vectorize_ntargs(InCharT** in_ntarg_array) {
 	std::vector<std::basic_string<OutCharT>> result;
 	if (in_ntarg_array == nullptr) {
@@ -101,7 +141,7 @@ std::vector<std::basic_string<OutCharT>> vectorize_ntargs(InCharT** in_ntarg_arr
 	}
 
 	for (auto argv = in_ntarg_array; *argv != nullptr; ++argv) {
-		result.emplace_back(jessilib::string_cast<OutCharT>(std::wstring_view{ *argv }));
+		result.emplace_back(ntarg_cast<OutCharT, InCharT>(*argv));
 	}
 
 	return result;

src/include/jessilib/io/ansi/ansi_text.hpp

@@ -29,7 +29,7 @@ class text_wrapper : public text {};
 
 // Control characters
 static constexpr uint8_t ESCAPE_CHR{ 0x1B };
-static constexpr std::string_view ESCAPE{ "\x1B[" };
+static constexpr std::u8string_view ESCAPE{ u8"\x1B[" };
 // ESCAPE + '[' + <color or graphics code list> + 'm'
 
 // Graphics modes
@@ -42,16 +42,16 @@ static constexpr uint8_t CONCEALED{ '8' };
 static constexpr uint8_t GRAPHICS_SEP{ ';' };
 static constexpr uint8_t GRAPHICS_END{ 'm' };
 
-static constexpr std::string_view COLOR_HEX{ "38;2" };
+static constexpr std::u8string_view COLOR_HEX{ u8"38;2" };
-static constexpr std::string_view COLOR_DEFAULT{ "39" };
+static constexpr std::u8string_view COLOR_DEFAULT{ u8"39" };
-static constexpr std::string_view COLOR_BG_HEX{ "48;2" };
+static constexpr std::u8string_view COLOR_BG_HEX{ u8"48;2" };
-static constexpr std::string_view COLOR_BG_DEFAULT{ "49" };
+static constexpr std::u8string_view COLOR_BG_DEFAULT{ u8"49" };
 
 } // namespace ansi
 
 template<>
-inline std::string text_to_string<ansi::text_wrapper>(const ansi::text_wrapper& in_text) {
+inline std::u8string text_to_string<ansi::text_wrapper>(const ansi::text_wrapper& in_text) {
-	std::string result;
+	std::u8string result;
 	result.reserve(in_text.string().size() + 8);
 
 	auto set_graphic_option = [&result](auto in_option) {
@@ -65,7 +65,12 @@ inline std::string text_to_string<ansi::text_wrapper>(const ansi::text_wrapper&
 		}
 
 		// Append graphics option
-		result += in_option;
+		if constexpr (std::is_same_v<decltype(in_option), std::string>) {
+			result += jessilib::string_view_cast<char8_t>(in_option);
+		}
+		else {
+			result += in_option;
+		}
 	};
 
 	// Set graphics properties
@@ -117,10 +122,10 @@ inline std::string text_to_string<ansi::text_wrapper>(const ansi::text_wrapper&
 } // namespace jessilib
 
 template<>
-struct fmt::formatter<jessilib::io::ansi::text_wrapper> : formatter<std::string> {
+struct fmt::formatter<jessilib::io::ansi::text_wrapper, char8_t> : formatter<std::u8string, char8_t> {
 	template <typename FormatContext>
 	auto format(const jessilib::io::ansi::text_wrapper& in_text, FormatContext& in_context) {
 		// Pass result to base
-		return formatter<std::string>::format(jessilib::io::text_to_string(in_text), in_context);
+		return formatter<std::u8string, char8_t>::format(jessilib::io::text_to_string(in_text), in_context);
 	}
 };

src/include/jessilib/io/command.hpp

@@ -28,7 +28,7 @@ namespace io {
 class basic_command {
 public:
 	virtual ~basic_command() = default;
-	virtual std::string_view label() const = 0;
+	virtual std::u8string_view label() const = 0;
 	virtual void execute(command_context& in_context) const = 0;
 }; // class basic_command
 
@@ -45,20 +45,20 @@ public:
 	command& operator=(command&&) = delete;
 
 	// Instantiates and self-registers a command
-	command(callback_t in_callback, std::string_view in_label);
+	command(callback_t in_callback, std::u8string_view in_label);
 
 	// Cleans up and unregisters the command
 	virtual ~command();
 
 	// Unique label associated with command
-	virtual std::string_view label() const override;
+	virtual std::u8string_view label() const override;
 
 	// Executes the command
 	virtual void execute(command_context& in_context) const override;
 
 private:
 	callback_t m_callback;
-	std::string_view m_label;
+	std::u8string_view m_label;
 }; // class command
 
 } // namespace io

src/include/jessilib/io/command_context.hpp

@@ -27,14 +27,15 @@ namespace io {
 
 class command_context {
 public:
-	command_context(std::string_view in_input);
+	using string_type = std::u8string;
-	command_context(std::string_view in_input, std::string_view in_keyword, std::string_view in_parameter);
+	command_context(string_type in_input);
+	command_context(string_type in_input, string_type in_keyword, string_type in_parameter);
 
 	/** User input */
-	std::string_view input() const;
+	const string_type& input() const;
-	std::string_view keyword() const;
+	const string_type& keyword() const;
-	std::string_view parameter() const;
+	const string_type& parameter() const;
-	std::vector<std::string_view> paramaters() const;
+	std::vector<std::u8string_view> paramaters() const;
 
 	/** Reply */
 	virtual bool privateReply(const formatted_message& in_message) = 0; // Reply to invoker privately (i.e: PM)
@@ -42,12 +43,12 @@ public:
 
 	/** Additional contextual details */
 	virtual object details() const = 0; // Additional details
-	virtual std::string getText(std::string_view tag) const = 0; // Get localized text
+	virtual std::u8string getText(std::u8string_view tag) const = 0; // Get localized text
 
 private:
-	std::string_view m_input;
+	string_type m_input;
-	std::string_view m_keyword;
+	string_type m_keyword;
-	std::string_view m_parameter;
+	string_type m_parameter;
 }; // class command_context
 
 } // namespace io

src/include/jessilib/io/irc/irc_text.hpp

@@ -18,7 +18,7 @@
 
 #pragma once
 
-#include "io/message.hpp"
+#include "jessilib/io/message.hpp"
 
 namespace jessilib {
 namespace io {
@@ -45,19 +45,19 @@ static constexpr color s_irc_colors[] {
 #endif // JESSILIB_IRC_SIMPLE_COLORS
 };
 
-static constexpr std::string_view s_irc_color_codes[] {
+static constexpr std::u8string_view s_irc_color_codes[] {
 	// Basic 16 colors (0-15)
-	"00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "10", "11", "12", "13", "14", "15",
+	u8"00", u8"01", u8"02", u8"03", u8"04", u8"05", u8"06", u8"07", u8"08", u8"09", u8"10", u8"11", u8"12", u8"13", u8"14", u8"15",
 
 #ifndef JESSILIB_IRC_SIMPLE_COLORS
 	// Extended colors (16-98, making a total of 99 color choices)
-	"16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", "27",
+	u8"16", u8"17", u8"18", u8"19", u8"20", u8"21", u8"22", u8"23", u8"24", u8"25", u8"26", u8"27",
-	"28", "29", "30", "31", "32", "33", "34", "35", "36", "37", "38", "39",
+	u8"28", u8"29", u8"30", u8"31", u8"32", u8"33", u8"34", u8"35", u8"36", u8"37", u8"38", u8"39",
-	"40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "50", "51",
+	u8"40", u8"41", u8"42", u8"43", u8"44", u8"45", u8"46", u8"47", u8"48", u8"49", u8"50", u8"51",
-	"52", "53", "54", "55", "56", "57", "58", "59", "60", "61", "62", "63",
+	u8"52", u8"53", u8"54", u8"55", u8"56", u8"57", u8"58", u8"59", u8"60", u8"61", u8"62", u8"63",
-	"64", "65", "66", "67", "68", "69", "70", "71", "72", "73", "74", "75",
+	u8"64", u8"65", u8"66", u8"67", u8"68", u8"69", u8"70", u8"71", u8"72", u8"73", u8"74", u8"75",
-	"76", "77", "78", "79", "80", "81", "82", "83", "84", "85", "86", "87",
+	u8"76", u8"77", u8"78", u8"79", u8"80", u8"81", u8"82", u8"83", u8"84", u8"85", u8"86", u8"87",
-	"88", "89", "90", "91", "92", "93", "94", "95", "96", "97", "98"
+	u8"88", u8"89", u8"90", u8"91", u8"92", u8"93", u8"94", u8"95", u8"96", u8"97", u8"98"
 #endif // JESSILIB_IRC_SIMPLE_COLORS
 };
 
@@ -98,7 +98,7 @@ constexpr color normalize_color(color in_color) {
 	return s_irc_colors[from_color(in_color)];
 }
 
-constexpr std::string_view color_to_code(color in_color) {
+constexpr std::u8string_view color_to_code(color in_color) {
 	return s_irc_color_codes[from_color(in_color)];
 }
 
@@ -112,7 +112,7 @@ static constexpr uint8_t COLOR_HEX{ 0x04 };
 static constexpr uint8_t REVERSE{ 0x16 };
 static constexpr uint8_t NORMAL{ 0x0F };
 
-text::property properties_to_toggle(text::property in_active_properties, text::property in_text_properties, uint8_t in_active_color, uint8_t in_text_color, uint8_t in_active_color_bg, uint8_t in_text_color_bg) {
+inline text::property properties_to_toggle(text::property in_active_properties, text::property in_text_properties, uint8_t in_active_color, uint8_t in_text_color, uint8_t in_active_color_bg, uint8_t in_text_color_bg) {
 	text::property_backing_t active_properties_backing = static_cast<text::property_backing_t>(in_active_properties);
 	text::property_backing_t text_properties_backing = static_cast<text::property_backing_t>(in_text_properties);
 
@@ -138,8 +138,8 @@ text::property properties_to_toggle(text::property in_active_properties, text::p
 } // namespace irc
 
 template<>
-inline std::string text_to_string<irc::text_wrapper>(const irc::text_wrapper& in_text) {
+inline std::u8string text_to_string<irc::text_wrapper>(const irc::text_wrapper& in_text) {
-	std::string result;
+	std::u8string result;
 	result.reserve(in_text.string().size() + 8);
 
 	// Prepend properties
@@ -178,10 +178,10 @@ inline std::string text_to_string<irc::text_wrapper>(const irc::text_wrapper& in
 } // namespace jessilib
 
 template<>
-struct fmt::formatter<jessilib::io::irc::text_wrapper> : formatter<std::string> {
+struct fmt::formatter<jessilib::io::irc::text_wrapper, char8_t> : formatter<std::u8string, char8_t> {
 	template <typename FormatContext>
 	auto format(const jessilib::io::irc::text_wrapper& in_text, FormatContext& in_context) {
 		// Pass result to base
-		return formatter<std::string>::format(jessilib::io::text_to_string(in_text), in_context);
+		return formatter<std::u8string, char8_t>::format(jessilib::io::text_to_string(in_text), in_context);
 	}
 };

src/include/jessilib/io/message.hpp

@@ -23,6 +23,8 @@
 #include <string_view>
 #include <type_traits>
 #include <fmt/format.h>
+#include <fmt/xchar.h>
+#include "jessilib/unicode.hpp"
 #include "color.hpp"
 
 namespace jessilib {
@@ -114,11 +116,11 @@ public:
 	void set_color_bg(color in_color);
 
 	/** Text */
-	const std::string& string() const;
+	const std::u8string& string() const;
-	void set_string(std::string_view in_string);
+	void set_string(std::u8string_view in_string);
 
 private:
-	std::string m_string;
+	std::u8string m_string;
 	property m_properties{ property::normal };
 	color m_color{};
 	color m_color_bg{};
@@ -154,13 +156,13 @@ private:
 class formatted_message {
 public:
 	template<typename... Args>
-	formatted_message(std::string in_format, Args&& ... args)
+	formatted_message(std::u8string in_format, Args&& ... args)
 		: m_format{ std::move(in_format) },
 		m_message{ std::forward<Args>(args)... } {
 		// Empty ctor body
 	}
 
-	const std::string& format() const {
+	const std::u8string& format() const {
 		return m_format;
 	}
 
@@ -169,12 +171,12 @@ public:
 	}
 
 private:
-	std::string m_format;
+	std::u8string m_format;
 	std::vector<text> m_message;
 };
 
 template<typename WrapperT>
-std::string text_to_string(const WrapperT& in_text) {
+std::u8string text_to_string(const WrapperT& in_text) {
 	return in_text.string();
 }
 
@@ -208,18 +210,23 @@ std::string process_message(const jessilib::io::message& msg) {
 }
 
 template<typename WrapperT>
-std::string process_message(const jessilib::io::formatted_message& msg) {
+std::u8string process_message(const jessilib::io::formatted_message& msg) {
-	using format_arg = fmt::format_args::format_arg;
+	using FormatCharT = char8_t;
-	std::vector<format_arg> args;
+	using format_args_type = fmt::basic_format_args<fmt::buffer_context<FormatCharT>>;
+	using format_arg_type = format_args_type::format_arg;
+	using format_context_type = fmt::buffer_context<FormatCharT>;
+	using string_view_type = fmt::v8::basic_string_view<FormatCharT>;
 
 	// Populate args
+	std::vector<format_arg_type> args;
 	for (auto& text : msg.get_message()) {
-		args.emplace_back(fmt::detail::make_arg<fmt::format_context>(wrap_text<WrapperT>(text)));
+		args.emplace_back(fmt::detail::make_arg<format_context_type>(wrap_text<WrapperT>(text)));
 	}
 
 	// Pass args into vformat
-	fmt::format_args text_args{ args.data(), static_cast<int>(args.size()) };
+	format_args_type text_args{ args.data(), static_cast<int>(args.size()) };
-	return fmt::vformat(msg.format(), text_args);
+	string_view_type fmt_view{ msg.format().data(), msg.format().size() };
+	return fmt::vformat(fmt_view, text_args);
 }
 
 } // namespace io

src/include/jessilib/unicode.hpp

@@ -220,7 +220,9 @@ std::pair<bool, std::string> ustring_to_mbstring(std::basic_string_view<CharT> i
 
 	std::mbstate_t mbstate{};
 	decode_result decode;
-	while ((decode = decode_codepoint(in_string).units != 0)) {
+	while ((decode = decode_codepoint(in_string)).units != 0) {
+		in_string.remove_prefix(decode.units);
+
 		char buffer[MB_CUR_MAX]; // MB_LEN_MAX
 		size_t bytes_written = std::c32rtomb(buffer, decode.codepoint, &mbstate);
 		if (bytes_written > MB_CUR_MAX) {

src/test/app_parameters.cpp

@@ -58,14 +58,14 @@ TEST(AppParametersTest, null) {
 	app_parameters parameters{ 0, static_cast<const char**>(nullptr) };
 	app_parameters parameters2{ 1234, static_cast<const char**>(nullptr) };
 
-	EXPECT_TRUE(parameters.path().empty());
+	EXPECT_TRUE(parameters.name().empty());
 	EXPECT_TRUE(parameters.arguments().empty());
 	EXPECT_TRUE(parameters.switches().empty());
 	EXPECT_TRUE(parameters.switches_set().empty());
 	EXPECT_TRUE(parameters.values().empty());
 	EXPECT_TRUE(parameters.as_object().null());
 
-	EXPECT_TRUE(parameters2.path().empty());
+	EXPECT_TRUE(parameters2.name().empty());
 	EXPECT_TRUE(parameters2.arguments().empty());
 	EXPECT_TRUE(parameters2.switches().empty());
 	EXPECT_TRUE(parameters2.switches_set().empty());
@@ -73,11 +73,11 @@ TEST(AppParametersTest, null) {
 	EXPECT_TRUE(parameters2.as_object().null());
 }
 
-TEST(AppParametersTest, path_only) {
+TEST(AppParametersTest, name_only) {
 	ArgWrapper args{ "/path/to/exe" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_EQ(parameters.path(), u8"/path/to/exe");
+	EXPECT_EQ(parameters.name(), u8"/path/to/exe");
 	EXPECT_TRUE(parameters.arguments().empty());
 	EXPECT_TRUE(parameters.switches().empty());
 	EXPECT_TRUE(parameters.switches_set().empty());
@@ -85,14 +85,14 @@ TEST(AppParametersTest, path_only) {
 
 	auto obj = parameters.as_object();
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 }
 
 TEST(AppParametersTest, path_only_w) {
 	ArgWrapper<wchar_t> args{ L"/path/to/exe" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_EQ(parameters.path(), u8"/path/to/exe");
+	EXPECT_EQ(parameters.name(), u8"/path/to/exe");
 	EXPECT_TRUE(parameters.arguments().empty());
 	EXPECT_TRUE(parameters.switches().empty());
 	EXPECT_TRUE(parameters.switches_set().empty());
@@ -100,14 +100,14 @@ TEST(AppParametersTest, path_only_w) {
 
 	auto obj = parameters.as_object();
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 }
 
 TEST(AppParametersTest, single_switch) {
 	ArgWrapper args{ "/path/to/exe", "-switch" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_FALSE(parameters.path().empty());
+	EXPECT_FALSE(parameters.name().empty());
 	EXPECT_EQ(parameters.arguments().size(), 1U);
 	EXPECT_EQ(parameters.switches().size(), 1U);
 	EXPECT_EQ(parameters.switches_set().size(), 1U);
@@ -115,7 +115,7 @@ TEST(AppParametersTest, single_switch) {
 
 	auto obj = parameters.as_object();
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 	EXPECT_EQ(obj[u8"Args"], object{ std::vector<std::u8string>{ u8"-switch" } });
 	EXPECT_EQ(obj[u8"Switches"], object{ std::vector<std::u8string>{ u8"switch" } });
 }
@@ -124,7 +124,7 @@ TEST(AppParametersTest, double_switch) {
 	ArgWrapper args{ "/path/to/exe", "-switch1", "--switch2" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_FALSE(parameters.path().empty());
+	EXPECT_FALSE(parameters.name().empty());
 	EXPECT_EQ(parameters.arguments().size(), 2U);
 	EXPECT_EQ(parameters.switches().size(), 2U);
 	EXPECT_EQ(parameters.switches_set().size(), 2U);
@@ -134,7 +134,7 @@ TEST(AppParametersTest, double_switch) {
 	std::vector<std::u8string> expected_args{ u8"-switch1", u8"--switch2" };
 	std::vector<std::u8string> expected_switches{ u8"switch1", u8"switch2" };
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 	EXPECT_EQ(obj[u8"Args"], expected_args);
 	EXPECT_EQ(obj[u8"Switches"], expected_switches);
 }
@@ -143,7 +143,7 @@ TEST(AppParametersTest, duplicate_switch) {
 	ArgWrapper args{ "/path/to/exe", "-switch", "--switch" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_FALSE(parameters.path().empty());
+	EXPECT_FALSE(parameters.name().empty());
 	EXPECT_EQ(parameters.arguments().size(), 2U);
 	EXPECT_EQ(parameters.switches().size(), 2U);
 	EXPECT_EQ(parameters.switches_set().size(), 1U);
@@ -153,7 +153,7 @@ TEST(AppParametersTest, duplicate_switch) {
 	std::vector<std::u8string> expected_args{ u8"-switch", u8"--switch" };
 	std::vector<std::u8string> expected_switches{ u8"switch", u8"switch" };
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 	EXPECT_EQ(obj[u8"Args"], expected_args);
 	EXPECT_EQ(obj[u8"Switches"], expected_switches);
 }
@@ -162,7 +162,7 @@ TEST(AppParametersTest, single_value) {
 	ArgWrapper args{ "/path/to/exe", "-key", "value" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_FALSE(parameters.path().empty());
+	EXPECT_FALSE(parameters.name().empty());
 	EXPECT_EQ(parameters.arguments().size(), 2U);
 	EXPECT_EQ(parameters.switches().size(), 0U);
 	EXPECT_EQ(parameters.switches_set().size(), 0U);
@@ -172,7 +172,7 @@ TEST(AppParametersTest, single_value) {
 	std::vector<std::u8string> expected_args{ u8"-key", u8"value" };
 	std::map<std::u8string, object> expected_values{ { u8"key", u8"value" } };
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 	EXPECT_EQ(obj[u8"Args"], expected_args);
 	EXPECT_EQ(obj[u8"Values"], expected_values);
 }
@@ -181,7 +181,7 @@ TEST(AppParametersTest, single_value_eq) {
 	ArgWrapper args{ "/path/to/exe", "-key=value" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_FALSE(parameters.path().empty());
+	EXPECT_FALSE(parameters.name().empty());
 	EXPECT_EQ(parameters.arguments().size(), 1U);
 	EXPECT_EQ(parameters.switches().size(), 0U);
 	EXPECT_EQ(parameters.switches_set().size(), 0U);
@@ -191,7 +191,7 @@ TEST(AppParametersTest, single_value_eq) {
 	std::vector<std::u8string> expected_args{ u8"-key=value" };
 	std::map<std::u8string, object> expected_values{ { u8"key", u8"value" } };
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 	EXPECT_EQ(obj[u8"Args"], expected_args);
 	EXPECT_EQ(obj[u8"Values"], expected_values);
 }
@@ -200,7 +200,7 @@ TEST(AppParametersTest, multiword_value) {
 	ArgWrapper args{ "/path/to/exe", "-key", "valuePart1", "valuePart2" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_FALSE(parameters.path().empty());
+	EXPECT_FALSE(parameters.name().empty());
 	EXPECT_EQ(parameters.arguments().size(), 3U);
 	EXPECT_EQ(parameters.switches().size(), 0U);
 	EXPECT_EQ(parameters.switches_set().size(), 0U);
@@ -210,7 +210,7 @@ TEST(AppParametersTest, multiword_value) {
 	std::vector<std::u8string> expected_args{ u8"-key", u8"valuePart1", u8"valuePart2" };
 	std::map<std::u8string, object> expected_values{ { u8"key", u8"valuePart1 valuePart2" } };
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 	EXPECT_EQ(obj[u8"Args"], expected_args);
 	EXPECT_EQ(obj[u8"Values"], expected_values);
 }
@@ -219,7 +219,7 @@ TEST(AppParametersTest, multiword_value_eq) {
 	ArgWrapper args{ "/path/to/exe", "-key=valuePart1", "valuePart2" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_FALSE(parameters.path().empty());
+	EXPECT_FALSE(parameters.name().empty());
 	EXPECT_EQ(parameters.arguments().size(), 2U);
 	EXPECT_EQ(parameters.switches().size(), 0U);
 	EXPECT_EQ(parameters.switches_set().size(), 0U);
@@ -229,7 +229,7 @@ TEST(AppParametersTest, multiword_value_eq) {
 	std::vector<std::u8string> expected_args{ u8"-key=valuePart1", u8"valuePart2" };
 	std::map<std::u8string, object> expected_values{ { u8"key", u8"valuePart1 valuePart2" } };
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 	EXPECT_EQ(obj[u8"Args"], expected_args);
 	EXPECT_EQ(obj[u8"Values"], expected_values);
 }
@@ -238,7 +238,7 @@ TEST(AppParametersTest, double_value) {
 	ArgWrapper args{ "/path/to/exe", "-key", "value", "--key2", "value2" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_FALSE(parameters.path().empty());
+	EXPECT_FALSE(parameters.name().empty());
 	EXPECT_EQ(parameters.arguments().size(), 4U);
 	EXPECT_EQ(parameters.switches().size(), 0U);
 	EXPECT_EQ(parameters.switches_set().size(), 0U);
@@ -248,7 +248,7 @@ TEST(AppParametersTest, double_value) {
 	std::vector<std::u8string> expected_args{ u8"-key", u8"value", u8"--key2", u8"value2" };
 	std::map<std::u8string, object> expected_values{ { u8"key", u8"value" }, { u8"key2", u8"value2" } };
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 	EXPECT_EQ(obj[u8"Args"], expected_args);
 	EXPECT_EQ(obj[u8"Values"], expected_values);
 }
@@ -257,7 +257,7 @@ TEST(AppParametersTest, double_value_eq) {
 	ArgWrapper args{ "/path/to/exe", "-key=value", "--key2=value2" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_FALSE(parameters.path().empty());
+	EXPECT_FALSE(parameters.name().empty());
 	EXPECT_EQ(parameters.arguments().size(), 2U);
 	EXPECT_EQ(parameters.switches().size(), 0U);
 	EXPECT_EQ(parameters.switches_set().size(), 0U);
@@ -267,7 +267,7 @@ TEST(AppParametersTest, double_value_eq) {
 	std::vector<std::u8string> expected_args{ u8"-key=value", u8"--key2=value2" };
 	std::map<std::u8string, object> expected_values{ { u8"key", u8"value" }, { u8"key2", u8"value2" } };
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 	EXPECT_EQ(obj[u8"Args"], expected_args);
 	EXPECT_EQ(obj[u8"Values"], expected_values);
 }
@@ -276,7 +276,7 @@ TEST(AppParametersTest, switch_and_value) {
 	ArgWrapper args{ "/path/to/exe", "--switch", "-key", "value" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_FALSE(parameters.path().empty());
+	EXPECT_FALSE(parameters.name().empty());
 	EXPECT_EQ(parameters.arguments().size(), 3U);
 	EXPECT_EQ(parameters.switches().size(), 1U);
 	EXPECT_EQ(parameters.switches_set().size(), 1U);
@@ -287,7 +287,7 @@ TEST(AppParametersTest, switch_and_value) {
 	std::vector<std::u8string> expected_switches{ u8"switch" };
 	std::map<std::u8string, object> expected_values{ { u8"key", u8"value" } };
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 	EXPECT_EQ(obj[u8"Args"], expected_args);
 	EXPECT_EQ(obj[u8"Switches"], expected_switches);
 	EXPECT_EQ(obj[u8"Values"], expected_values);
@@ -301,7 +301,7 @@ TEST(AppParametersTest, switch_and_value_w) {
 	ArgWrapper<wchar_t> args{ L"/path/to/exe", L"--switch", L"-key", L"value" };
 	app_parameters parameters{ args.argc(), args.argv() };
 
-	EXPECT_FALSE(parameters.path().empty());
+	EXPECT_FALSE(parameters.name().empty());
 	EXPECT_EQ(parameters.arguments().size(), 3U);
 	EXPECT_EQ(parameters.switches().size(), 1U);
 	EXPECT_EQ(parameters.switches_set().size(), 1U);
@@ -312,7 +312,7 @@ TEST(AppParametersTest, switch_and_value_w) {
 	std::vector<std::u8string> expected_switches{ u8"switch" };
 	std::map<std::u8string, object> expected_values{ { u8"key", u8"value" } };
 	EXPECT_FALSE(obj.null());
-	EXPECT_EQ(obj[u8"Path"], u8"/path/to/exe");
+	EXPECT_EQ(obj[u8"Name"], u8"/path/to/exe");
 	EXPECT_EQ(obj[u8"Args"], expected_args);
 	EXPECT_EQ(obj[u8"Switches"], expected_switches);
 	EXPECT_EQ(obj[u8"Values"], expected_values);
@@ -321,3 +321,38 @@ TEST(AppParametersTest, switch_and_value_w) {
 	EXPECT_FALSE(parameters.has_switch(u8"switch2"));
 	EXPECT_EQ(parameters.get_value(u8"key"), u8"value");
 }
+
+TEST(AppParametersTest, arg_before_env) {
+	ArgWrapper<wchar_t> args{ L"/path/to/exe", L"--switch", L"-key", L"value" };
+	ArgWrapper<wchar_t> envs{ L"key=other_value", L"other_key=some_value" };
+	app_parameters parameters{ args.argc(), args.argv(), envs.argv() };
+
+	EXPECT_EQ(parameters.get_arg_value(u8"key"), u8"value");
+	EXPECT_EQ(parameters.get_env_value(u8"key"), u8"other_value");
+	EXPECT_EQ(parameters.get_value(u8"key"), u8"value");
+	EXPECT_EQ(parameters.get_value(u8"other_key"), u8"some_value");
+}
+
+TEST(AppParametersTest, arg_stop) {
+	ArgWrapper<wchar_t> args{ L"/path/to/exe", L"--switch", L"-key", L"value", L"--", L"-other_key", L"value" };
+	ArgWrapper<wchar_t> envs{ L"key=other_value", L"other_key=some_value" };
+	app_parameters parameters{ args.argc(), args.argv(), envs.argv() };
+
+	EXPECT_EQ(parameters.get_arg_value(u8"key"), u8"value");
+	EXPECT_EQ(parameters.get_env_value(u8"key"), u8"other_value");
+	EXPECT_EQ(parameters.get_value(u8"key"), u8"value");
+	EXPECT_EQ(parameters.get_value(u8"other_key"), u8"some_value");
+}
+
+TEST(AppParametersTest, precedent) {
+	ArgWrapper<wchar_t> args{ L"/path/to/exe", L"some", L"words", L"--switch", L"-key", L"value", L"--", L"-other_key", L"value" };
+	ArgWrapper<wchar_t> envs{ L"key=other_value", L"other_key=some_value" };
+	app_parameters parameters{ args.argc(), args.argv(), envs.argv() };
+
+	EXPECT_EQ(parameters.precedent(), u8"some words");
+	EXPECT_TRUE(parameters.has_switch(u8"switch"));
+	EXPECT_EQ(parameters.get_arg_value(u8"key"), u8"value");
+	EXPECT_EQ(parameters.get_env_value(u8"key"), u8"other_value");
+	EXPECT_EQ(parameters.get_value(u8"key"), u8"value");
+	EXPECT_EQ(parameters.get_value(u8"other_key"), u8"some_value");
+}