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    Assigned

    Check if a pointer is valid.

    Declaration

    Source position: system.fpd line 34

    function Assigned(P: Pointer) : Boolean;

    Description

    Assigned returns True if P is non-nil and returns 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

    See also

    Name Description
    New Dynamically allocate memory for variable.

    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.