RE: [Dev-C++] ioannis - namespaces

[Ioannis V. <no...@ho...>]

> -----Original Message-----
> From: dev...@li... 
> [mailto:dev...@li...] On Behalf 
> Of Daniel Glenfield
> Sent: Tuesday, June 18, 2002 1:36 PM
> To: dev...@li...
> Subject: [Dev-C++] ioannis - namespaces
> 
> 
> Ioannis, you've mentioned several times to always use 
> namespaces as locally 
> as possible. I was wondering why this is? What is the benefit 
> of using them 
> locally?
> 
> Daniel


The namespace system was made to provide a system that enables combining
various libraries while protecting from name clashes.

So you can for example do:

#include <iostream>

// Daniel's version of vector
#include <daniel.h>


int main()
{
 using std::cout;
 using daniel::vector;

 vector<int>array(50, 1);

 cout<<array[i]<<endl;
}


As god says in TC++PL, using global using directives is an efffort to
defeat the namespace system, which has bad consequences in large
projects. We must try to use more using std::something; than using
namespace std; and as in small scope as possible.

In general myself, i use using std::something; for 2-3 facilities in a
given function, and if there are more i place a using namespace std; in
that function scope.


Ioannis

* Ioannis Vranos
* Programming pages: http://www.noicys.cjb.net
* Alternative URL: http://run.to/noicys