On Wed, Aug 11, 2010 at 3:23 PM, Alexandre Bergel <alexandre@bergel.eu>wrote:
Yes please don't add that.
This is not my intention. But I just discovered some bugs in my test because I instantiated a class that shouldn't be instantiated since it is abstract. If now we close our eyes and dream about a clean oo language. Will forbidding to instantiate an abstract class a wished feature?
I am also against of this change. We should continue to have flexible language and not to convert this in Java. In addition, I MAY want to instantiate Abstract classes. Sometime you are doing prototypes, or TDD, and you want to instantiate an object of an abstract class. Even if you have a subclassResponsability. I don't care. Maybe I am not testing that right now, nor showing that to my client. I think the correct way to detect your kind of problems is with Lint. If it is not already done, maybe it could be added. Cheers Mariano
Cheers, Alexandre
On Wednesday, August 11, 2010, Stanislav Paskalev <kshorg@gmail.com>
wrote:
And it will also require modifying the Pharo by Example book that says that there's nothing wrong with instantiating abstract classes and that there is no *abstract* class marker in this sense, only abstract methods.
So, why would try to convert Pharo to another language ?
Stanislav Paskalev
On Wed, Aug 11, 2010 at 3:43 PM, Alexandre Bergel <alexandre@bergel.eu> wrote:
Hi!
Just wondering. What about redefining new into: -=-=-=-=-=-=-=-=-=-=-=-= Behavior>>new "Answer a new initialized instance of the receiver (which is a class) with no indexable variables. Fail if the class is indexable." self isAbstractClass ifTrue: [ self error: 'An abstract class cannot be instantiated' ]. ^ self basicNew initialize -=-=-=-=-=-=-=-=-=-=-=-=
This may break a lot of code however.
Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.
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