Weed пишет: > Bill Baxter пишет: >> On Sun, Feb 22, 2009 at 1:02 AM, Weed <resume...@mail.ru> wrote: >>> Bill Baxter пишет: >>>> 2009/2/21 Weed <resume...@mail.ru>: >>>>> Weed пишет: >>>>>> Bill Baxter пишет: >>>>>> >>>>>>> Why don't you just show us the class in the way you would like to >>>>>>> write it in C++, and we'll show you how to write it in D, or finally >>>>>>> agree with you that it's not possible. But as long as you continue >>>>>>> to be hand-wavy about "common base classes" we're at a bit of an >>>>>>> impasse. So far everyone thinks D can do what you want it to do based >>>>>>> on your vague descriptions. >>>>> As I said, you can write everything using "goto" and "if". >>>>> >>>>> ...But why you do not like the original example of this thread? >>>> Please post again. I don't seem to recall any detailed example. >>>> >>>> --bb >>> http://www.digitalmars.com/pnews/read.php?server=news.digitalmars.com&group=digitalmars.D&artnum=83506 >> You should use a struct there! Your code does not show you doing >> anything that would even remotely suggest using a class is worthwhile. >> You're doing value operations on value types. That's what structs >> are for. > > Why? > > What if I have not substantiated the fact that c1 is a class I should > use there a structure? > > Used in D a model of placement classes only in heap have a rule "if you > made the class and trying to pass it by value is somewhere in your code, > there is a design error?
Explains why the question is given in this form: I am received or wrote a classes. Is it right to overload the operator opAdd and use them? I think yes. But why not allow this operation at the same speed that allows C++?