Object-Oriented PxPlus

DEF CLASS

Defines the object class.

DROP CLASS

Deletes class definition and all related information.

DROP OBJECT

Deletes an object.

FUNCTION

Declares functions or methods for the object.

LIKE

Specifies other objects that this object inherits from.

LOAD CLASS

Preloads a class definition into memory from a .pvc file.

LOCAL

Declares internal data/properties for the object.

NEW( )

Creates an object instance.

OPEN OBJECT

Opens a file for exclusive use in an object.

PRECISION

Sets default program precision for use within the object.

PROGRAM

Defines the default program that contains the object logic.

PROPERTY

Declares data/properties for the object.

REF( )

Controls reference counts.

RENAME CLASS

Change name of an existing class.

STATIC

Dynamically declares LOCAL variables.

_Class$

Contains the name of the class for current object.

_Obj

Identifies internal object identifier of current object.

_Refcnt

Contains the reference count for this class of object.

'_Type$

Internal property for PxPlus OOP objects that provides a list of the various combinations of parameter types for the objects methods/functions.

Each reference to a function declaration with different calling parameters will be listed using '_Type$ with numeric parameters identified with an 'N' and strings with an 'S'.

Arrays will contain '{ALL}' and functions declared with the '(*)' syntax will also be reported accordingly.

Example:

   0010 DEF CLASS "TypeTest"
   0020 FUNCTION Find(Numeric)FindFunc
   0030 FUNCTION Find(String$)FindFunc
   0040 FUNCTION Find(Numeric,String$)FindFunc
   0050 FUNCTION Find(NumArray{ALL})FindFunc
   0060 FUNCTION Find(StrArray${ALL})FindFunc
   0070 FUNCTION Find(*)FindFunc
   0080 END DEF
   0090 !
   0100 FindFunc:
   0110 RETURN 0
   x=new("TypeTest")
   ?x'*
   Find(),
   ?x'_Type$
   Find(*),Find(N),Find(N{ALL}),Find(N,S),Find(S),Find(S{ALL}),