ISO Pascal reference manual

*ERROR 124 -- this parameter must have packed type
Appendix A
The first parameter of UNPACK and the third parameter of PACK must
be references to arrays which have been declared PACKED.
PROGRAM fail;
VAR p : ARRAY [1..5] OF char;
u : ARRAY [1..5] OF char;
BEGIN
pack(u, 1, p); (p is not PACKED}
unpack(p, u, 1); (p is not PACKED}
END.
*ERROR 125 -- this parameter must not have packed type
The first parameter of PACK and the third parameter of UNPACK must
not be references to arrays which have been declared PACKED.
PROGRAM fail;
VAR p : PACKED ARRAY [1..5] OF char;
u : PACKED ARRAY C1..5] OF char;
BEGIN
pack(u, 1, p); (u is PACKED}
unpack(p, u, 1); (u is PACKED}
END.
*ERROR 126 -- this item may not be passed as a VAR parameter
The variable used to define the currently active variant of a record may not
be passed to a procedure or function as a VAR parameter.
PROGRAM fail;
VAR r : RECORD
CASE x : boolean OF
true: (t : integer);
false:(f : real);
END;
PROCEDURE test(VAR v : boolean);
BEGIN
END;
BEGIN
Pascal Issue I 89