SomDescendedFrom

This method tests whether one class is derived from another. Not generally overridden.

For backward compatibility, this method does not take an Environment parameter.


 * Original Class: SOMClass

Syntax
boolean somDescendedFrom (SOMClass receiver, SOMClass aClassObj)

Parameters

 * receiver (SOMClass) : A pointer to the class object to be tested.
 * aClassObj (SOMClass) : A pointer to the potential ancestor class.

Return Code

 * rc (boolean) :
 * Returns 1 (true) if receiver is derived from aClassObj. 0
 * Returns 0 (false) if receiver is not derived from aClassObj.

Remarks
This method tests whether the receiver class is derived from a given class. For programs that use classes as types, this method can be used to ascertain whether the type of one object is a subtype of another.

This method considers a class object to be descended from itself.

Example Code
 /*   Note: Dog is a subclass of Animal. */ main { AnimalNewClass(0,0); DogNewClass(0,0);
 * 1) include 

if (_somDescendedFrom (_Dog, _Animal)) somPrintf("Dog IS descended from Animal\n"); else somPrintf("Dog is NOT descended from Animal\n"); if (_somDescendedFrom (_Animal, _Dog)) somPrintf("Animal IS descended from Dog\n"); else somPrintf("Animal is NOT descended from Dog\n");  This program produces the following output: Dog IS descended from Animal Animal is NOT descended from Dog

Methods

 * somIsA
 * somIsInstanceOf