Fail¶

Fail a constructor.

Declaration¶

Source position: system.fpd line 96

procedure Fail;

Description¶

Fail can be used in a constructor for an object or class. It will exit the constructor at once, and the memory allocated for the constructor is freed. This mean that for objects allocated with New, the resulting pointer is Nil and for classes, the object instance will be Nil.

See also¶

Name	Description
TypeOf	Return pointer to VMT of an object.
New	Dynamically allocate memory for variable.
Initialize	Initialize memory block using RTTI.
Finalize	Finalize (clean up) memory block using RTTI.

Example¶

program testfail;

{$mode objfpc}

Type
  TMyClass = Class
    Constructor Create;
  end;
  
  
Constructor TMyClass.Create;    

begin
  Fail;
end;

var
  M : TMyClass;
  
begin
  M:=TMyClass.Create;
  Writeln('M is nil : ',Not Assigned(M));
end.