Fixed #15 but now regression on cbor 1-7

Optional was the cause and now we get a bunch of bad_optionals

include/gp/containers/vector.hpp

@@ -160,6 +160,7 @@ namespace gp{
 					elem.~T();
 				}
 				gp_config::assertion(alloc.get().deallocate(ary), "could not deallocate");
+				ary = nullptr;
 			}
 		}
 

include/gp/functional/optional.hpp

@@ -34,7 +34,23 @@ namespace gp{
 		constexpr optional(T&& value)
 		: ready{true}
 		{
-			new(buffer) T(gp::forward<T>(value));
+			new(buffer) T(gp::move(value));
+		}
+
+		constexpr optional(const optional& oth)
+		: ready{oth.ready}
+		{
+			if(ready) {
+				new(buffer) T(oth.value());
+			}
+		}
+
+		constexpr optional(optional&& oth)
+		: ready{oth.ready}
+		{
+			if(ready) {
+				new(buffer) T(gp::move(oth.value()));
+			}
 		}
 
 		~optional() {
@@ -63,10 +79,30 @@ namespace gp{
 
 		optional& operator=(T&& value) {
 			if(ready) {
-				*(T*)buffer = gp::forward<T>(value);
+				*(T*)buffer = gp::move(value);
+			} else {
+				ready = true;
+				new(buffer) T(gp::move(value));
+			}
+			return *this;
+		}
+
+		optional& operator=(const optional& oth) {
+			if(ready) {
+				*(T*)buffer = oth.value();
+			} else {
+				ready = true;
+				new(buffer) T(oth.value());
+			}
+			return *this;
+		}
+
+		optional& operator=(optional&& oth) {
+			if(ready) {
+				*(T*)buffer = gp::move(oth.value());
 			} else {
 				ready = true;
-				new(buffer) T(gp::forward<T>(value));
+				new(buffer) T(gp::move(oth.value()));
 			}
 			return *this;
 		}