Assigned

Check if a pointer is valid

Declaration

Source position: system.fpd line 20

function Assigned(

P: Pointer

):Boolean;

Description

Assigned returns True if P is non-nil and retuns False of P is nil. The main use of Assigned is that Procedural variables, method variables and class-type variables also can be passed to Assigned.

Errors

None

Example

Program Example96;

{ Program to demonstrate the Assigned function. }

Var P : Pointer;

begin
  If Not Assigned(P) then
    Writeln ('Pointer is initially NIL');
  P:=@P;
  If Not Assigned(P) then
    Writeln('Internal inconsistency')
  else
    Writeln('All is well in FPC')
end.

Notes