473,322 Members | 1,408 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,322 software developers and data experts.

non-class template params in partial specializations

Why aren't we allowed to do partial specializations like these on
numeric template parameters? That would have allowed us to do all
kinds of interesting stuffs like loops of variable nesting (bad
practice though - I Know) and lots of other things!g++ even knows
that it is a partial specialization I am aiming for ... but it
just won't allow it!

//-----------------------------------------------------------------
template <unsigned X,unsigned Y> unsigned pow(){return pow<X,Y-1>();}
template <unsigned X> unsigned pow<X,0>(){return 1;} //ERROR!!

const unsigned var2=pow<2,5>();
//-----------------------------------------------------------------

Even funnier, complete specializations of these type are very legal!
For example,
//-----------------------------------------------------------------
template <unsigned X> unsigned powof3(){return 3*powof3<X-1>();}
template <> unsigned powof3<0>(){return 1;}

const unsigned var=powof3<4>();
//-----------------------------------------------------------------
and no one complains! but why is there a difference here?

Samee

Jul 23 '05 #1
1 1612
Samee Zahur wrote:
Why aren't we allowed to do partial specializations like these on
numeric template parameters? [...]


There are no partial specialisations of function templates. Period.
If you want to know the rationale behind it, post to comp.std.c++.
Here we discuss the "how", there they discuss the "why".
Jul 23 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

12
by: lothar | last post by:
re: 4.2.1 Regular Expression Syntax http://docs.python.org/lib/re-syntax.html *?, +?, ?? Adding "?" after the qualifier makes it perform the match in non-greedy or minimal fashion; as few...
5
by: klaus triendl | last post by:
hi, recently i discovered a memory leak in our code; after some investigation i could reduce it to the following problem: return objects of functions are handled as temporary objects, hence...
3
by: Mario | last post by:
Hello, I couldn't find a solution to the following problem (tried google and dejanews), maybe I'm using the wrong keywords? Is there a way to open a file (a linux fifo pipe actually) in...
1
by: Markus Ernst | last post by:
Hi I wrote a function that "normalizes" strings for use in URLs in a UTF-8 encoded content administration application. After having removed the accents from latin characters I try to remove all...
4
by: bwmiller16 | last post by:
Guys - I'm doing a database consistency check for a client and I find that they're building unique indexes for performance/query reasons where they could be using non-unique indexes. Note...
2
by: Ian825 | last post by:
I need help writing a function for a program that is based upon the various operations of a matrix and I keep getting a "non-aggregate type" error. My guess is that I need to dereference my...
0
by: amitvps | last post by:
Secure Socket Layer is very important and useful for any web application but it brings some problems too with itself. Handling navigation between secure and non-secure pages is one of the cumbersome...
399
by: =?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?= | last post by:
PEP 1 specifies that PEP authors need to collect feedback from the community. As the author of PEP 3131, I'd like to encourage comments to the PEP included below, either here (comp.lang.python), or...
9
by: Francois Grieu | last post by:
When running the following code under MinGW, I get realloc(p,0) returned NULL Is that a non-conformance? TIA, Francois Grieu #include <stdio.h> #include <stdlib.h>
12
by: puzzlecracker | last post by:
is it even possible or/and there is a better alternative to accept input in a nonblocking manner?
0
by: ryjfgjl | last post by:
ExcelToDatabase: batch import excel into database automatically...
1
isladogs
by: isladogs | last post by:
The next Access Europe meeting will be on Wednesday 6 Mar 2024 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). In this month's session, we are pleased to welcome back...
0
by: Vimpel783 | last post by:
Hello! Guys, I found this code on the Internet, but I need to modify it a little. It works well, the problem is this: Data is sent from only one cell, in this case B5, but it is necessary that data...
0
by: jfyes | last post by:
As a hardware engineer, after seeing that CEIWEI recently released a new tool for Modbus RTU Over TCP/UDP filtering and monitoring, I actively went to its official website to take a look. It turned...
0
by: ArrayDB | last post by:
The error message I've encountered is; ERROR:root:Error generating model response: exception: access violation writing 0x0000000000005140, which seems to be indicative of an access violation...
1
by: PapaRatzi | last post by:
Hello, I am teaching myself MS Access forms design and Visual Basic. I've created a table to capture a list of Top 30 singles and forms to capture new entries. The final step is a form (unbound)...
1
by: Defcon1945 | last post by:
I'm trying to learn Python using Pycharm but import shutil doesn't work
0
by: af34tf | last post by:
Hi Guys, I have a domain whose name is BytesLimited.com, and I want to sell it. Does anyone know about platforms that allow me to list my domain in auction for free. Thank you
0
by: Faith0G | last post by:
I am starting a new it consulting business and it's been a while since I setup a new website. Is wordpress still the best web based software for hosting a 5 page website? The webpages will be...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.