is_class_member

Arguments

Returns

t if the instance or class is a member of the class, else nil.

Description

This function checks if a given instance or class is a member (an instance or derived class) of another class.

Example

This example is based on the classes developed in class.

    Gamma> sqB = new(Square);
    {Square (length) (sides . 4)}
    Gamma> is_class_member(sqB, Square);
    t
    Gamma> is_class_member(Square, RegPolygon);
    t
    Gamma> is_class_member(sqB, RegPolygon);
    t
    Gamma> polyF = new(RegPolygon);
    {RegPolygon (length) (sides)}
    Gamma> is_class_member(polyF, Square);
    nil
    Gamma>  
    		

See Also

new