langs a-z

Task/Generic-swap/Pascal/generic-swap.pascal

@@ -0,0 +1,28 @@
+program generictest;
+
+{$mode objfpc}
+
+type
+  generic TSwap<T> = procedure (var a, b: T);
+
+procedure Proc1(var a, b: integer);
+  var
+    temp: integer;
+  begin
+    temp := a;
+    a := b;
+    b := temp;
+  end;
+
+var
+  S, T: integer;
+  SwapInt: specialize TSwap<integer>;
+
+begin
+  S := 4;
+  T := 3;
+  SwapInt := @Proc1;
+  writeln(S, T:2);
+  SwapInt(S, T);
+  writeln(S, T:2);
+end.