Refactor tuple element access in fast_io_dsal

- Updated `get` function signatures in `tuple.h` to return `decltype(auto)` for improved type deduction.
- Enhanced consistency by ensuring `[[nodiscard]]` attribute is applied uniformly across all overloads of `get`.
- Added new overloads for `get` to support retrieval by type, improving usability and flexibility.
- Minor formatting adjustments for better readability in the `forward_as_tuple` function.

Author: MacroModel

include/fast_io_dsal/impl/tuple.h

@@ -94,33 +94,33 @@ tuple(Args &&...) -> tuple<Args...>;
 
 template <::std::size_t I, typename... Args>
 FAST_IO_GNU_ALWAYS_INLINE
-[[nodiscard]]
-constexpr auto&& get(::fast_io::containers::tuple<Args...> &self) noexcept
+	[[nodiscard]]
+	constexpr decltype(auto) get(::fast_io::containers::tuple<Args...> &self) noexcept
 {
 	return static_cast<::fast_io::containers::details::tuple_element_impl_<I, ::fast_io::containers::details::pack_indexing_t_<I, Args...>> &>(self).val_;
 }
 
 template <::std::size_t I, typename... Args>
 FAST_IO_GNU_ALWAYS_INLINE
-[[nodiscard]]
-constexpr auto&& get(::fast_io::containers::tuple<Args...> const &self) noexcept
+	[[nodiscard]]
+	constexpr decltype(auto) get(::fast_io::containers::tuple<Args...> const &self) noexcept
 {
 	return static_cast<::fast_io::containers::details::tuple_element_impl_<I, ::fast_io::containers::details::pack_indexing_t_<I, Args...>> const &>(self).val_;
 }
 
 template <::std::size_t I, typename... Args>
 FAST_IO_GNU_ALWAYS_INLINE
-[[nodiscard]]
-constexpr auto&& get(::fast_io::containers::tuple<Args...> &&self) noexcept
+	[[nodiscard]]
+	constexpr decltype(auto) get(::fast_io::containers::tuple<Args...> &&self) noexcept
 {
 	return ::std::move(
 		static_cast<::fast_io::containers::details::tuple_element_impl_<I, ::fast_io::containers::details::pack_indexing_t_<I, Args...>> &&>(self).val_);
 }
 
 template <::std::size_t I, typename... Args>
 FAST_IO_GNU_ALWAYS_INLINE
-[[nodiscard]]
-constexpr auto&& get(::fast_io::containers::tuple<Args...> const &&self) noexcept
+	[[nodiscard]]
+	constexpr decltype(auto) get(::fast_io::containers::tuple<Args...> const &&self) noexcept
 {
 	return ::std::move(
 		static_cast<::fast_io::containers::details::tuple_element_impl_<I, ::fast_io::containers::details::pack_indexing_t_<I, Args...>> const &&>(self).val_);
@@ -147,17 +147,36 @@ constexpr auto get_tuple_element_by_type_() noexcept
 template <typename T, typename... Args>
 	requires((::std::same_as<T, Args> + ...) == 1)
 FAST_IO_GNU_ALWAYS_INLINE
-[[nodiscard]]
-constexpr auto&& get(::fast_io::containers::tuple<Args...> const &self) noexcept
+	[[nodiscard]]
+	constexpr decltype(auto) get(::fast_io::containers::tuple<Args...> const &self) noexcept
 {
 	return static_cast<decltype(::fast_io::containers::details::get_tuple_element_by_type_<T, 0, Args...>())::type const &>(self).val_;
 }
 
 template <typename T, typename... Args>
 	requires((::std::same_as<T, Args> + ...) == 1)
 FAST_IO_GNU_ALWAYS_INLINE
-[[nodiscard]]
-constexpr auto&& get(::fast_io::containers::tuple<Args...> const &&self) noexcept
+	[[nodiscard]]
+	constexpr decltype(auto) get(::fast_io::containers::tuple<Args...> const &&self) noexcept
+{
+	return ::std::move(
+		static_cast<decltype(::fast_io::containers::details::get_tuple_element_by_type_<T, 0, Args...>())::type const &&>(self).val_);
+}
+
+template <typename T, typename... Args>
+	requires((::std::same_as<T, Args> + ...) == 1)
+FAST_IO_GNU_ALWAYS_INLINE
+	[[nodiscard]]
+	constexpr decltype(auto) get(::fast_io::containers::tuple<Args...> &self) noexcept
+{
+	return static_cast<decltype(::fast_io::containers::details::get_tuple_element_by_type_<T, 0, Args...>())::type const &>(self).val_;
+}
+
+template <typename T, typename... Args>
+	requires((::std::same_as<T, Args> + ...) == 1)
+FAST_IO_GNU_ALWAYS_INLINE
+	[[nodiscard]]
+	constexpr decltype(auto) get(::fast_io::containers::tuple<Args...> &&self) noexcept
 {
 	return ::std::move(
 		static_cast<decltype(::fast_io::containers::details::get_tuple_element_by_type_<T, 0, Args...>())::type const &&>(self).val_);
@@ -177,15 +196,15 @@ constexpr bool is_tuple_<tuple<Args...>> = true;
 template <typename T>
 concept is_tuple = ::fast_io::containers::details::is_tuple_<::std::remove_cvref_t<T>>;
 
-template<typename... Args>
+template <typename... Args>
 [[nodiscard]]
-constexpr auto forward_as_tuple(Args&&... args)
+constexpr auto forward_as_tuple(Args &&...args)
 {
 #if defined(__clang__)
 #pragma clang diagnostic push
 #pragma clang diagnostic ignored "-Wmissing-braces"
 #endif
-	return ::fast_io::containers::tuple<Args&&...>{::std::forward<Args>(args)...};
+	return ::fast_io::containers::tuple<Args &&...>{::std::forward<Args>(args)...};
 #if defined(__clang__)
 #pragma clang diagnostic pop
 #endif

include/fast_io_hosted/process/process/option.h

@@ -8,8 +8,10 @@ enum process_mode : ::std::uint_least64_t
 	// *indicates that the process mode has not been evaluated yet
 	new_session = static_cast<::std::uint_least64_t>(1) << 0,
 	// [POSIX] setsid(), [WINDOWS, WINNT] CREATE_NEW_PROCESS_GROUP (Windows is currently not implemented)
-	alloc_new_console = static_cast<::std::uint_least64_t>(1) << 1
+	alloc_new_console = static_cast<::std::uint_least64_t>(1) << 1,
 	// [WINDOWS, WINNT] CREATE_NEW_CONSOLE (Automatically assign a console to new threads)
+	argv0_no_appname = static_cast<::std::uint_least64_t>(1) << 2,
+	// Do not automatically append appname to argv0
 };
 
 inline constexpr process_mode operator&(process_mode x, process_mode y) noexcept