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Re: does U++ use Smalltalk(Java) approach? [message #396 is a reply to message #395]

Mon, 12 December 2005 14:50

mirek
Messages: 14267
Registered: November 2005

Ultimate Member

1.: Yes. Smalltalk model is unsuitable for C++. For C++ it is better to have unrelated ("decoupled") classes and class hierarchies and glue them together using templates (usually containers).

2.: Value is intended just for storing 'values'. Now it is a little bit hard to explain what exactly 'value' is, and at the same time it is very important for U++ programming style.... (there is quite a lot of effort put into dealing with various types of objects - values, pick values, non-copyable objects - non-values etc...)

Perhaps better is to provide some examples: number is a Value, date is a Value, String is a Value, etc...

Maybe a right descrition is that "for value, object identity does not matter, just its content (well, ehm, its value Smile

).

I wish I could explain that more....

Not also that Value supports some value-like operations, like comparing values (by their, well, uhm, values...) converting similar types of values (you can assign 'int' to the Value and then assign this value to 'double', same for Date / Time etc.).

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