Attempted a better iterator design but C++ doesn"t make it easy

Fortune for rngxx's current commit: Small blessing − 小吉

include/rngxx/internal/iter.h

@@ -0,0 +1,62 @@
+#pragma once
+
+#include <new>
+#include <utility>
+
+namespace rng::util
+{
+
+	template<typename T>
+	struct uninit final
+	{
+		inline static T* align_buffer(unsigned char* buffer) { return reinterpret_cast<T*>(buffer + alignof(T) - reinterpret_cast<intptr_t>(buffer) % alignof(T)); }
+		inline static const T* align_buffer(const unsigned char* buffer) { return reinterpret_cast<const T*>(buffer + alignof(T) - reinterpret_cast<intptr_t>(buffer) % alignof(T)); }
+	
+		inline T* ptr() { return align_buffer(&a_data[0]); }
+		inline const T* ptr() const { return align_buffer(&a_data[0]); }
+
+		inline unsigned char* bytes() { return &a_data[0]; }
+		inline const unsigned char* bytes() const { return &a_data[0]; }
+
+		inline uninit(T&& value) { give(std::move(value)); }
+		inline uninit(){}
+
+		inline void drop() { ptr()->~T(); }
+
+		inline T&& take() { return std::move(*ptr()); }
+		inline void give(T&& value) { new (ptr()) T(std::move(value)); }
+
+		inline T& operator=(T&& value) { give(std::move(value)); return *ptr(); } 
+
+		inline T replace(T&& value) { 
+			auto x = take();
+			drop();
+			give(std::move(value));
+			return x;
+		}
+
+		inline static uninit<T> move(uninit<T>&& m) { return uninit<T>(std::move(m)); }
+		inline static uninit<T> copy(const uninit<T>& c) { return uninit<T>(c); }
+		inline uninit<T> bitwise_copy() const { 
+			uninit u;
+			u.a_data = a_data;
+			return u;
+		}
+	private:
+		inline uninit(const uninit<T>& copy) : uninit(T(*copy.ptr())){}
+		inline uninit(uninit<T>&& move) : uninit(std::move(*move.ptr())){}
+		std::array<unsigned char, sizeof(T)+alignof(T)> a_data;
+	};
+	template<typename T>
+	struct generic_iterator
+	{
+		inline T try_next()
+		{
+			uninit<T> v;
+			if(next(v)) { return v.take(); }
+			else throw "c++ sucks"; //XXX: eh... this is too draining
+		}
+	protected:
+		virtual bool next(uninit<T>& output) = 0;
+	};
+}

src/iter.cpp

@@ -1,4 +1,11 @@
 #include <rngxx.hpp>
+#include <iter.h>
+
+void d(rng::util::generic_iterator<int>& i)
+{
+	i.try_next();
+
+}
 
 //XXX: Doing this is not going to work ...
 #if 0