⎕OID Object ID

Implemented for Internal, External and System classes.

Syntax:

    integer ← objref.⎕OID
    integer ← classref.⎕OID
    integer ← ⎕OID            (Within user-defined method, same as ⎕THIS.⎕OID)

⎕OID returns an integer which uniquely identifies a given object instance or class definition within the workspace. It starts at 1 for the first-ever object created in the workspace, and increments by one each time a new object is created (for example by a call to ⎕NEW or ⎕CLONE).

On 32-bit versions of APLX, ⎕OID may return a floating-point data type if you have created more object instances than will fit in a 32-bit signed integer.