diff --git a/include/gp/algorithm/modifiers.hpp b/include/gp/algorithm/modifiers.hpp
index b8d8706..8fd440c 100644
--- a/include/gp/algorithm/modifiers.hpp
+++ b/include/gp/algorithm/modifiers.hpp
@@ -75,7 +75,7 @@ namespace gp {
 
 	template< class T >
 	struct remove_cvref {
-		typedef std::remove_cv_t<std::remove_reference_t<T>> type;
+		using type = std::remove_cv_t<std::remove_reference_t<T>>;
 	};
 
 	template< class T >
diff --git a/include/gp/array.hpp b/include/gp/array.hpp
index 1c93cbd..e6f55ee 100644
--- a/include/gp/array.hpp
+++ b/include/gp/array.hpp
@@ -30,7 +30,7 @@ namespace gp{
 
 		template<typename ...U>
 		array(U&& ...values)
-		: ary{gp::move((T&&)values)...}
+		: ary{gp::forward<U>((T&&)values)...}
 		{}
 
 		array(array&& values)
diff --git a/include/gp/bloomfilter.hpp b/include/gp/bloomfilter.hpp
index c3bc4d6..2bd663e 100644
--- a/include/gp/bloomfilter.hpp
+++ b/include/gp/bloomfilter.hpp
@@ -17,7 +17,7 @@ namespace gp {
 				uint32_t
 			>::type,
 			phys_size
-		> data;
+		> data{};
 
 		template<typename T>
 		static void set_bit(T* value, const int v_pos) {
diff --git a/include/gp/enveloppe/cbor.hpp b/include/gp/enveloppe/cbor.hpp
index cc2f425..95b79a4 100644
--- a/include/gp/enveloppe/cbor.hpp
+++ b/include/gp/enveloppe/cbor.hpp
@@ -76,13 +76,13 @@ namespace gp {
 	template<typename T>
 	using cbor_composite = gp::fixed_variant<
 		cbor_number,
-		//gp::buffer<std::byte>,
-		//bool,
-		//gp::vector<T>,
+		gp::buffer<std::byte>,
+		bool,
+		gp::vector<T>,
 		gp::vector<gp::pair<T, T>>,
-		//gp::nullopt_t,
-		undefined_t//,
-		//cbor_floating_point
+		gp::nullopt_t,
+		undefined_t,
+		cbor_floating_point
 	>;
 
 	class cbor_value {
@@ -101,7 +101,7 @@ namespace gp {
 		, alloc(alloc_v)
 		{}
 
-		cbor_value(cbor_value& oth)
+		cbor_value(const cbor_value& oth)
 		: contents(oth.contents)
 		, alloc(oth.alloc)
 		{}
@@ -128,6 +128,18 @@ namespace gp {
 			return *this;
 		}
 
+		template<typename T>
+		cbor_value& operator=(T& value) {
+			contents = value;
+			return *this;
+		}
+
+		template<typename T>
+		cbor_value& operator=(T&& value) {
+			contents = gp::move(value);
+			return *this;
+		}
+
 
 		auto new_array() {
 			return gp::vector<cbor_value>{alloc};
diff --git a/include/gp/pair.hpp b/include/gp/pair.hpp
index 341063f..a662646 100644
--- a/include/gp/pair.hpp
+++ b/include/gp/pair.hpp
@@ -10,19 +10,26 @@ namespace gp{
 
 		pair() : first(), second() {}
 
-		pair(const T1& a, const T2& b) : first(a), second(b) {}
+		pair(T1& a, T2& b) : first(a), second(b) {}
+		pair(T1& a, T2&& b) : first(a), second(gp::move(b)) {}
+		pair(T1&& a, T2& b) : first(gp::move(a)), second(b) {}
+		pair(T1&& a, T2&& b) : first(gp::move(a)), second(gp::move(b)) {}
+
+		pair(const pair& v)
+		: first(v.first)
+		, second(v.second)
+		{}
+
+		pair(pair& v)
+		: first(v.first)
+		, second(v.second)
+		{}
 
 		pair(pair&& v)
 		: first(gp::move(v.first))
 		, second(gp::move(v.second))
 		{}
 
-		template<typename U1, typename U2>
-		pair(U1&& a, U2&& b) 
-		: first(gp::forward<U1>(a))
-		, second(gp::forward<U2>(b))
-		{}
-
 		template<typename U1, typename U2>
 		pair(pair<U1, U2>&& v)
 		: first(gp::move(v.first))
diff --git a/include/gp/variant.hpp b/include/gp/variant.hpp
index 3d8609c..d39d78a 100644
--- a/include/gp/variant.hpp
+++ b/include/gp/variant.hpp
@@ -31,27 +31,34 @@ namespace gp{
 			mvtor(oth.buffer, tmp);
 		}
 	public:
-		template<typename U>//, typename std::enable_if<list_contains_class<U,T...>::value,int>::type>
-		constexpr fixed_variant(U& value)
+		template<typename U, typename = std::enable_if_t<list_contains_class<gp::remove_cvref_t<U>,T...>::value,int>>
+		fixed_variant(U& value)
 		: index{r_index_of<U, T...>::value}
 		{
-			new(buffer) U(value);
-			dtor = gp::function<void(void*)>([](void* thing){((U*)thing)->~U();}, nullopt);
-			cpytor = gp::function<void(void*, void*)>([](void* src, void* dest){new(dest) U(*(U*)src);}, nullopt);
-			mvtor = gp::function<void(void*, void*)>([](void* src, void* dest){new(dest) U(gp::move(*(U*)src));}, nullopt);
+			using actual = gp::remove_cvref_t<U>;
+			new(buffer) actual(value);
+			dtor = gp::function<void(void*)>([](void* thing){((actual*)thing)->~actual();}, nullopt);
+			cpytor = gp::function<void(void*, void*)>([](void* src, void* dest){new(dest) actual(*(actual*)src);}, nullopt);
+			mvtor = gp::function<void(void*, void*)>([](void* src, void* dest){new(dest) actual(gp::move(*(actual*)src));}, nullopt);
 		}
 
-		template<typename U>//, typename std::enable_if<list_contains_class<U,T...>::value,int>::type>
-		constexpr fixed_variant(U&& value)
+		static_assert(list_contains_class<int, int>::value, "list_contains_class doesn't work properly");
+		static_assert(list_contains_class<int, char, int>::value, "list_contains_class doesn't work properly");
+		static_assert(list_contains_class<int, int, char>::value, "list_contains_class doesn't work properly");
+		static_assert(list_contains_class<int, char, int, char>::value, "list_contains_class doesn't work properly");
+
+		template<typename U, typename = std::enable_if_t<list_contains_class<gp::remove_cvref_t<U>,T...>::value,int>>
+		fixed_variant(U&& value)
 		: index{r_index_of<U, T...>::value}
 		{
-			new(buffer) U(std::move(value));
-			dtor = gp::function<void(void*)>([](void* thing){((U*)thing)->~U();}, nullopt);
-			cpytor = gp::function<void(void*, void*)>([](void* src, void* dest){new(dest) U(*(U*)src);}, nullopt);
-			mvtor = gp::function<void(void*, void*)>([](void* src, void* dest){new(dest) U(gp::move(*(U*)src));}, nullopt);
+			using actual = gp::remove_cvref_t<U>;
+			new(buffer) actual(std::move(value));
+			dtor = gp::function<void(void*)>([](void* thing){((actual*)thing)->~actual();}, nullopt);
+			cpytor = gp::function<void(void*, void*)>([](void* src, void* dest){new(dest) actual(*(actual*)src);}, nullopt);
+			mvtor = gp::function<void(void*, void*)>([](void* src, void* dest){new(dest) actual(gp::move(*(actual*)src));}, nullopt);
 		}
 
-		constexpr fixed_variant(fixed_variant& oth)
+		fixed_variant(fixed_variant& oth)
 		: index{oth.index}
 		, dtor{oth.dtor}
 		, cpytor{oth.cpytor}
@@ -60,7 +67,7 @@ namespace gp{
 			cpytor(oth.buffer, buffer);
 		}
 
-		constexpr fixed_variant(fixed_variant&& oth)
+		fixed_variant(fixed_variant&& oth)
 		{
 			mvtor(buffer, oth.buffer);
 			gp::swap(dtor, oth.dtor);
diff --git a/include/gp/vector.hpp b/include/gp/vector.hpp
index c404f6c..2ea73f2 100644
--- a/include/gp/vector.hpp
+++ b/include/gp/vector.hpp
@@ -23,12 +23,12 @@ namespace gp{
 		, alloc(v)
 		{}
 
-		vector(const vector& oth)
+		vector(vector& oth)
+		: alloc(oth.alloc)
 		{
 			sz = 0;
 			cap = 0;
 			ary = nullptr;
-			alloc = oth.alloc;
 			gp_config::assertion(reserve(oth.size()), "could not reserve space on building");
 			sz = oth.size();
 			cap = oth.size();
diff --git a/tests/bloomfilter.cpp b/tests/bloomfilter.cpp
index 66f0284..9ce784b 100644
--- a/tests/bloomfilter.cpp
+++ b/tests/bloomfilter.cpp
@@ -55,6 +55,15 @@ struct bfilter2_test : public test_scaffold {
 		name += std::to_string(seedB);
 	}
 
+	bfilter2_test(uint32_t a, uint32_t b) {
+		seedA = a;
+		seedB = b;
+		name = __FILE__ ":2_seedA";
+		name += std::to_string(seedA);
+		name += "&seedB";
+		name += std::to_string(seedB);
+	}
+
 	virtual int run() {
 		
 		cheap_rand setter(seedA);
@@ -83,6 +92,7 @@ struct bfilter2_test : public test_scaffold {
 };
 
 append_test dummy_r2gflu3(new bfilter2_test{});
+append_test dummy_rsdgueiu3(new bfilter2_test{3780040561, 79423740});
 
 struct bfilter3_test : public test_scaffold {
 	uint32_t seed;
diff --git a/tests/cbor_test.cpp b/tests/cbor_test.cpp
index 744c947..fb1c726 100644
--- a/tests/cbor_test.cpp
+++ b/tests/cbor_test.cpp
@@ -16,6 +16,7 @@ struct cbor_test : public test_scaffold {
 		auto gen = data.new_object();
 		gen.emplace_back(gp::cbor_value{uint8_t(12), alloc}, gp::cbor_value{int32_t(-98), alloc});
 		gen.emplace_back(gp::cbor_value{uint8_t(13), alloc}, gp::cbor_value{uint32_t(98), alloc});
+		data = gen;
 		return 0;
 	}
 };