Change queues and stacks

- Make chain element private
- Remove JSON Marshaller from stack and queue
- Remove access to top chain element

containers/generics.go

@@ -1,15 +1,15 @@
 package containers
 
-type ChainElem[T any] struct {
+type chainElem[T any] struct {
 	Elem *T
-	Next *ChainElem[T]
+	Next *chainElem[T]
 }
 
 // reachable checks if you can reach elem l when starting from elem f.
 // It detects loops and returns false if it runs into one.
-func reachable[T any](f, l *ChainElem[T]) bool {
+func reachable[T any](f, l *chainElem[T]) bool {
 	// Map to keep track of nodes already visited
-	checks := make(map[*ChainElem[T]]bool)
+	checks := make(map[*chainElem[T]]bool)
 	for w := f; w != l; w = w.Next {
 		if w == nil {
 			return false
@@ -26,8 +26,8 @@ func reachable[T any](f, l *ChainElem[T]) bool {
 }
 
 // emptyElem creates a new ChainElem[T] with empty values.
-func emptyElem[T any]() *ChainElem[T] {
-	return &ChainElem[T]{
+func emptyElem[T any]() *chainElem[T] {
+	return &chainElem[T]{
 		Elem: nil,
 		Next: nil,
 	}