On Thu, Dec 04, 2003 at 03:54:21PM +1300, Greg Ewing wrote:
Does anyone have a real-life use case for subclassing int?
Not me. Dylan does not allow it's concrete numeric classes to be subclassed. That allows efficient method dispatch given restrictive enough declarations. Here is the standard numberic classes: class number(object): # Open Abstract Class class complex(number): # Sealed Abstract Class class real(complex): # Sealed Abstract Class class float(real): # Sealed Abstract Class class single_float(float) # Sealed Class class double_float(float) # Sealed Class class rational(real): # Sealed Abstract Class class integer(rational): # Sealed Class complex is sealed which basically means that it cannot be subclassed by users. That allows Sealing is described here: http://www.gwydiondylan.org/drm/drm_70.htm. The language reference does not describe a "long" integer type but the implementation is free to provide one. Neil