[Bug other/38531] namespace, <iostream>, <cstring>

["mayor1 at uralweb dot ru" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #4 from mayor1 at uralweb dot ru  2008-12-16 11:34 -------
Subject: Re:  namespace, <iostream>, <cstring>

On 15 Dec 2008 17:40:49 -0000
  "jakub at gcc dot gnu dot org" 
<gcc-bugzilla@gcc.gnu.org> wrote:
> 
> 
> ------- Comment #1 from jakub at gcc dot gnu dot org 
> 2008-12-15 17:40 -------
> Why is that considered a bug?
> If you want strlen etc. in std:: namespace, you need to 
>include <cstring>.

if junior coder include standart c++ header he must not 
know about all functions declaration in this header and 
all subheader - therefore them injected in std namespace

if he write using namespace std; - its his own problem

but if he write:
#include <cA>
using std:: ... ;
int f1() { ... }
f1();

and f1() calls instead of user defined f1(), f1() from 
header cC that was included by cB that was included by cA
- its too dificult to find and debug

check it out:
#include <iostream>
using std::cout;
using std::endl;
int strcat(const char* a,const char* b){
  cout<<"you never see it in g++ 4.1.2"
  cout<<a<<b<<endl;
  return 1;
}
int main(){
  char a[]="aaaaaa";
  char b[]="bbbb";
  cout<<strcat(a,b)<<endl; // by overloading call
// strlen included by iostream
  return 1; // and may be crash before it
} 

> -- 
> 
> jakub at gcc dot gnu dot org changed:
> 
>           What    |Removed                     |Added
> ----------------------------------------------------------------------------
>             Status|UNCONFIRMED                 |WAITING
> 
> 
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38531
> 
> ------- You are receiving this mail because: -------
> You reported the bug, or are watching the reporter.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38531