feat: remove stl::scope_exit

include/SFSE/Impl/PCH.h

@@ -205,65 +205,6 @@ namespace SFSE
 			string(const CharT (&)[N]) -> string<CharT, N - 1>;
 		}
 
-		template <class EF>
-			requires(std::invocable<std::remove_reference_t<EF>>)
-		class scope_exit
-		{
-		public:
-			// 1)
-			template <class Fn>
-			explicit scope_exit(Fn&& a_fn)  //
-				noexcept(std::is_nothrow_constructible_v<EF, Fn> || std::is_nothrow_constructible_v<EF, Fn&>)
-				requires(!std::is_same_v<std::remove_cvref_t<Fn>, scope_exit> && std::is_constructible_v<EF, Fn>)
-			{
-				static_assert(std::invocable<Fn>);
-
-				if constexpr (!std::is_lvalue_reference_v<Fn> && std::is_nothrow_constructible_v<EF, Fn>) {
-					_fn.emplace(std::forward<Fn>(a_fn));
-				} else {
-					_fn.emplace(a_fn);
-				}
-			}
-
-			// 2)
-			scope_exit(scope_exit&& a_rhs)  //
-				noexcept(std::is_nothrow_move_constructible_v<EF> || std::is_nothrow_copy_constructible_v<EF>)
-				requires(std::is_nothrow_move_constructible_v<EF> || std::is_copy_constructible_v<EF>)
-			{
-				static_assert(!(std::is_nothrow_move_constructible_v<EF> && !std::is_move_constructible_v<EF>));
-				static_assert(!(!std::is_nothrow_move_constructible_v<EF> && !std::is_copy_constructible_v<EF>));
-
-				if (a_rhs.active()) {
-					if constexpr (std::is_nothrow_move_constructible_v<EF>) {
-						_fn.emplace(std::forward<EF>(*a_rhs._fn));
-					} else {
-						_fn.emplace(a_rhs._fn);
-					}
-					a_rhs.release();
-				}
-			}
-
-			// 3)
-			scope_exit(const scope_exit&) = delete;
-
-			~scope_exit() noexcept
-			{
-				if (_fn.has_value()) {
-					(*_fn)();
-				}
-			}
-
-			void release() noexcept { _fn.reset(); }
-
-		private:
-			[[nodiscard]] bool active() const noexcept { return _fn.has_value(); }
-
-			std::optional<std::remove_reference_t<EF>> _fn;
-		};
-
-		template <class EF>
-		scope_exit(EF) -> scope_exit<EF>;
-
 		// backwards compat
 		template <
 			class E,