diff --git a/include/cow.hpp b/include/cow.hpp
index 26758aa..9b4e793 100644
--- a/include/cow.hpp
+++ b/include/cow.hpp
@@ -4,9 +4,9 @@
 
 #include <memory>
 
-#include "slice.hpp"
+#include "cow/slice.hpp"
 
-struct Cow : public Span<unsigned char> {
+struct Cow : public _cow_util::Span<unsigned char> {
 	struct Fake;
 	Cow() = delete;
 
diff --git a/include/cow/slice.hpp b/include/cow/slice.hpp
new file mode 100644
index 0000000..bd8fbf7
--- /dev/null
+++ b/include/cow/slice.hpp
@@ -0,0 +1,114 @@
+#pragma once
+
+namespace _cow_util {
+	/// A type that spans a sized region of memory
+	template<typename T>
+	struct Span {
+		virtual const void* area() const =0;
+		virtual void* area() = 0;
+		virtual size_t size() const = 0;
+
+		inline T* ptr() { return (T*)area(); }
+		inline const T* ptr() const { return (const T*)area(); }
+
+		inline size_t size_bytes() const { return size() * sizeof(T); }
+
+		inline unsigned char* as_bytes() { return (unsigned char*)area(); }
+		inline const unsigned char* as_bytes() const { return (const unsigned char*)area(); }
+
+		inline T& operator[](size_t index) {
+			if(index >= size()) throw "index out of range";
+			return ptr()[index];
+		}
+		inline const T& operator[](size_t index) const {
+			if(index >= size()) throw "index out of range";
+			return ptr()[index];
+		}
+
+		inline T* operator&() { return &(*this)[0]; }
+		inline const T* operator&() const {return &(*this)[0]; }
+
+		inline T* operator->() { return &(*this)[0]; }
+		inline const T* operator->() const {return &(*this)[0]; }
+
+		inline T& operator*() { return (*this)[0]; }
+		inline const T& operator*() const { return (*this)[0]; }
+
+
+		template<typename U>
+		inline U* area_as() requires(sizeof(T) % sizeof(U) == 0) { return (U*)area(); }
+		template<typename U>
+		inline const U* area_as() const requires(sizeof(T) % sizeof(U) == 0) { return (U*)area(); }
+
+		template<typename U>
+		size_t size_as() const requires(sizeof(T) % sizeof(U) == 0) { return size_bytes() / sizeof(U); }
+
+		struct Slice;
+
+		inline bool bounds_ok(size_t start) const
+		{
+			return start < size();
+		}
+		inline bool bounds_ok(size_t start, size_t len) const
+		{
+			return (start + len) <= size() && bounds_ok(start);
+		}
+
+		inline ssize_t wrap_len(ssize_t len) const
+		{
+			if(size() ==0 ) return 0;
+			return len < 0 ? wrap_len(size() + len) : ((size_t)len) % size();
+		}
+
+		/// Slice (absolute). Specify start and end.
+		inline const Slice slice_abs(size_t start, size_t end) const { auto len = end -start; if(bounds_ok(start,len)) return Slice(const_cast<T*>(ptr()+start), len); else throw "Out of bounds slice"; }
+		inline Slice slice_abs(size_t start, size_t end) { auto len = end -start; if(bounds_ok(start,len)) return Slice(ptr()+start, len); else throw "Out of bounds slice"; }
+
+		/// Slice (relative). Specify start and length.
+		inline const Slice slice(size_t start, size_t len) const { if(bounds_ok(start,len)) return Slice(const_cast<T*>(ptr()+start), len); else throw "Out of bounds slice"; }
+		inline Slice slice(size_t start, size_t len) { if(bounds_ok(start,len)) return Slice(ptr()+start, len); else throw "Out of bounds slice"; }
+		
+
+		/// Slice from 0. Specify length.
+		inline Slice slice(size_t len) { return slice(0, len); }
+		inline const Slice slice(size_t len) const { return slice(0, len); }//slice(start, size()-start); }
+
+		/// Slice total.
+		inline Slice slice() { return slice(0, size()); }
+		inline const Slice slice() const { return slice(0, size()); }
+
+		/// Slice wrapping. Specify start and end that may wrap over and/or under the span's size.
+		inline Slice slice_wrap(ssize_t start, ssize_t end) { return slice_abs((size_t)wrap_len(start), (size_t)wrap_len(end)); }
+		inline const Slice slice_wrap(ssize_t start, ssize_t end) const { return slice_abs((size_t)wrap_len(start), (size_t)wrap_len(end)); }
+		inline Slice slice_wrap(ssize_t len) { return slice_abs((size_t)wrap_len(len)); }
+		inline const Slice slice_wrap(ssize_t len) const { return slice_abs((size_t)wrap_len(len)); }
+
+		template<typename U>
+		inline Span<U>::Slice reinterpret() { return typename Span<U>::Slice((U*)area(), size_bytes() / sizeof(U)); }	
+		template<typename U>
+		inline Span<const U>::Slice reinterpret() const { return typename Span<const U>::Slice((const U*)area(), size_bytes() / sizeof(U)); }
+	};
+
+	/// A slice of memory with a backing pointer and size.
+	template<typename T>
+	struct Span<T>::Slice : public Span<T> {
+		inline Slice(T* ptr, size_t sz) : _area((void*)ptr), _size(sz){}
+		inline Slice(const Span<T>& slice) : _area(const_cast<void*>(slice.area())), _size(slice.size()){}
+		inline Slice(const Slice& copy) = default;
+		inline Slice(Slice&& copy) : _area(copy._area), _size(copy._size){ *const_cast<size_t*>(&copy._size) = 0; }
+		Slice() = delete;
+
+		inline const void* area() const override { return _area; }
+		inline void* area() override { return _area; }
+		inline size_t size() const override { return _size; }
+
+		
+		private:
+		void* const _area;
+		const size_t _size;
+	};
+
+
+	template<typename T>
+	using Slice = Span<T>::Slice;
+}
diff --git a/include/slice.hpp b/include/slice.hpp
deleted file mode 100644
index 6977874..0000000
--- a/include/slice.hpp
+++ /dev/null
@@ -1,112 +0,0 @@
-#pragma once
-
-/// A type that spans a sized region of memory
-template<typename T>
-struct Span {
-	virtual const void* area() const =0;
-	virtual void* area() = 0;
-	virtual size_t size() const = 0;
-
-	inline T* ptr() { return (T*)area(); }
-	inline const T* ptr() const { return (const T*)area(); }
-
-	inline size_t size_bytes() const { return size() * sizeof(T); }
-
-	inline unsigned char* as_bytes() { return (unsigned char*)area(); }
-	inline const unsigned char* as_bytes() const { return (const unsigned char*)area(); }
-
-	inline T& operator[](size_t index) {
-		if(index >= size()) throw "index out of range";
-		return ptr()[index];
-	}
-	inline const T& operator[](size_t index) const {
-		if(index >= size()) throw "index out of range";
-		return ptr()[index];
-	}
-
-	inline T* operator&() { return &(*this)[0]; }
-	inline const T* operator&() const {return &(*this)[0]; }
-
-	inline T* operator->() { return &(*this)[0]; }
-	inline const T* operator->() const {return &(*this)[0]; }
-
-	inline T& operator*() { return (*this)[0]; }
-	inline const T& operator*() const { return (*this)[0]; }
-
-
-	template<typename U>
-	inline U* area_as() requires(sizeof(T) % sizeof(U) == 0) { return (U*)area(); }
-	template<typename U>
-	inline const U* area_as() const requires(sizeof(T) % sizeof(U) == 0) { return (U*)area(); }
-
-	template<typename U>
-	size_t size_as() const requires(sizeof(T) % sizeof(U) == 0) { return size_bytes() / sizeof(U); }
-
-	struct Slice;
-
-	inline bool bounds_ok(size_t start) const
-	{
-		return start < size();
-	}
-	inline bool bounds_ok(size_t start, size_t len) const
-	{
-		return (start + len) <= size() && bounds_ok(start);
-	}
-
-	inline ssize_t wrap_len(ssize_t len) const
-	{
-		if(size() ==0 ) return 0;
-		return len < 0 ? wrap_len(size() + len) : ((size_t)len) % size();
-	}
-
-	/// Slice (absolute). Specify start and end.
-	inline const Slice slice_abs(size_t start, size_t end) const { auto len = end -start; if(bounds_ok(start,len)) return Slice(const_cast<T*>(ptr()+start), len); else throw "Out of bounds slice"; }
-	inline Slice slice_abs(size_t start, size_t end) { auto len = end -start; if(bounds_ok(start,len)) return Slice(ptr()+start, len); else throw "Out of bounds slice"; }
-
-	/// Slice (relative). Specify start and length.
-	inline const Slice slice(size_t start, size_t len) const { if(bounds_ok(start,len)) return Slice(const_cast<T*>(ptr()+start), len); else throw "Out of bounds slice"; }
-	inline Slice slice(size_t start, size_t len) { if(bounds_ok(start,len)) return Slice(ptr()+start, len); else throw "Out of bounds slice"; }
-	
-
-	/// Slice from 0. Specify length.
-	inline Slice slice(size_t len) { return slice(0, len); }
-	inline const Slice slice(size_t len) const { return slice(0, len); }//slice(start, size()-start); }
-
-	/// Slice total.
-	inline Slice slice() { return slice(0, size()); }
-	inline const Slice slice() const { return slice(0, size()); }
-
-	/// Slice wrapping. Specify start and end that may wrap over and/or under the span's size.
-	inline Slice slice_wrap(ssize_t start, ssize_t end) { return slice_abs((size_t)wrap_len(start), (size_t)wrap_len(end)); }
-	inline const Slice slice_wrap(ssize_t start, ssize_t end) const { return slice_abs((size_t)wrap_len(start), (size_t)wrap_len(end)); }
-	inline Slice slice_wrap(ssize_t len) { return slice_abs((size_t)wrap_len(len)); }
-	inline const Slice slice_wrap(ssize_t len) const { return slice_abs((size_t)wrap_len(len)); }
-
-	template<typename U>
-	inline Span<U>::Slice reinterpret() { return typename Span<U>::Slice((U*)area(), size_bytes() / sizeof(U)); }	
-	template<typename U>
-	inline Span<const U>::Slice reinterpret() const { return typename Span<const U>::Slice((const U*)area(), size_bytes() / sizeof(U)); }
-};
-
-/// A slice of memory with a backing pointer and size.
-template<typename T>
-struct Span<T>::Slice : public Span<T> {
-	inline Slice(T* ptr, size_t sz) : _area((void*)ptr), _size(sz){}
-	inline Slice(const Span<T>& slice) : _area(const_cast<void*>(slice.area())), _size(slice.size()){}
-	inline Slice(const Slice& copy) = default;
-	inline Slice(Slice&& copy) : _area(copy._area), _size(copy._size){ *const_cast<size_t*>(&copy._size) = 0; }
-	Slice() = delete;
-
-	inline const void* area() const override { return _area; }
-	inline void* area() override { return _area; }
-	inline size_t size() const override { return _size; }
-
-	
-	private:
-	void* const _area;
-	const size_t _size;
-};
-
-
-template<typename T>
-using Slice = Span<T>::Slice;
diff --git a/src/test/main.cpp b/src/test/main.cpp
index a99f9b2..a83b1ef 100644
--- a/src/test/main.cpp
+++ b/src/test/main.cpp
@@ -1,8 +1,17 @@
 #include <cow.hpp>
 
 #include <cstdio>
+#include <cstdlib>
 #include <cstring>
 
+#include <array>
+
+int main()
+{
+	return 0;
+}
+
+/*
 template<typename T = unsigned char>
 void print_slice(Slice<T> memory)
 {
@@ -54,4 +63,4 @@ int main()
 	read_fake(clone); //clone still functions because of refcount on origin.
 
 	return 0;
-}
+}*/