Another update from ingydotnet^djgoku

Task/Singly-linked-list-Element-definition/ALGOL-W/singly-linked-list-element-definition.alg

@@ -0,0 +1,8 @@
+    % record type to hold a singly linked list of integers                    %
+    record ListI ( integer iValue; reference(ListI) next );
+
+    % declare a variable to hold a list                                       %
+    reference(ListI) head;
+
+    % create a list of integers                                               %
+    head := ListI( 1701, ListI( 9000, ListI( 42, ListI( 90210, null ) ) ) );

Task/Singly-linked-list-Element-definition/Modula-3/singly-linked-list-element-definition.mod3

@@ -0,0 +1,6 @@
+TYPE
+  Link = REF LinkRcd;
+  LinkRcd = RECORD
+    Next: Link;
+    Data: INTEGER
+  END;

Task/Singly-linked-list-Element-definition/Objective-C/singly-linked-list-element-definition.m

@@ -1,14 +1,14 @@
 #import <Foundation/Foundation.h>
 
-@interface RCListElement : NSObject
+@interface RCListElement<T> : NSObject
 {
-  RCListElement *next;
-  id datum;
+  RCListElement<T> *next;
+  T datum;
 }
-- (RCListElement *)next;
-- (id)datum;
-- (RCListElement *)setNext: (RCListElement *)nx;
-- (void)setDatum: (id)d;
+- (RCListElement<T> *)next;
+- (T)datum;
+- (RCListElement<T> *)setNext: (RCListElement<T> *)nx;
+- (void)setDatum: (T)d;
 @end
 
 @implementation RCListElement
@@ -22,8 +22,7 @@
 }
 - (RCListElement *)setNext: (RCListElement *)nx
 {
-  RCListElement *p;
-  p = next;
+  RCListElement *p = next;
   next = nx;
   return p;
 }

Task/Singly-linked-list-Element-definition/Rust/singly-linked-list-element-definition.rust

@@ -1,4 +1,4 @@
 enum SingleLinkedList<T> {
-    Node(T, @mut SingleLinkedList<T>),
-    None
+   Node(T, Box<SingleLinkedList<T>>),
+   None
 }