Re: [Boost-Users] Query about boost type traits

From: hicks (hicks_at_[hidden])
Date: 2002-05-03 10:20:08

Hi Toon

Thanks for the lead::
http://www.cuj.com/experts/1810/alexandr.htm
I checked it out.

Alex wrote about 3 solutions for the problem
1.  Specialize on meber function argument type (e.g., add 
IntToType<is_arithmetic<T> > as a parameter type)
2.  Create external template helper class with specialization, and call 
that from member function.
3.  Create internal template helper class.

The article conclused that 1 was usually best.  But in the case of an 
operator function (operator::*) the number of
arguments are pre-defined, so that is not  an immediate option, although 
functions to be called from
inside the body of operator*() could be added.  As it happens I have 
already coded solution 2, so I think I'll
stick with that (also saves clutter inside struture definition).  Code 
is in last message I posted to this list.

Cheers

Craig Hicks

Toon Knapen wrote:

>On Friday 03 May 2002 13:58, John Maddock wrote:
>
>>>I know how to use type traits to enable compile time seperate procedures,
>>>but not how to use it to define a procedure for some type and not others.
>>>
>
>check out 
>http://groups.yahoo.com/group/Boost-Users/message/741
>
>from Aleksey in teaching me how to combine MPL with the type_traits.
>BTW, the article of Andrei really helps (I had read it before but finally 
>understood it really trying it muself)
>
>t
>
>
>Info: <http://www.boost.org>
>Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl>
>Unsubscribe: <mailto:boost-users-unsubscribe_at_[hidden]>
> 
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ 
>
>
>
>
>

[Non-text portions of this message have been removed]