On Sun, Feb 22, 2009 at 5:10 AM, Denis Koroskin <[email protected]> wrote: > On Sat, 21 Feb 2009 21:49:46 +0300, Bill Baxter <[email protected]> wrote: > >> On Sun, Feb 22, 2009 at 1:02 AM, Weed <[email protected]> wrote: >>> >>> Bill Baxter пишет: >>>> >>>> 2009/2/21 Weed <[email protected]>: >>>>> >>>>> 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. >> >> --bb > > That's what *everyone* tells him!
I am vaguely open to the possibility that he has a point. FLENS uses inheritance, for instance. But I don't recall what the intent of that inheritance was in FLENS, exactly. I more or less ported it to D without that, though, so I guess I didn't find it to be essential. See this: http://flens.cvs.sourceforge.net/viewvc/flens/FLENS/matvec/densevector.h?revision=1.36&view=markup Versus this: http://www.dsource.org/projects/multiarray/browser/trunk/multiarray/dflat/DenseVector.d Weed, if you want to make a real argument, that would be a good place to start. Investigate why and how FLENS uses inheritance. --bb
