STL iterators and the std namespace

[onion_skin]

How do I bring STL iterators into the current scope? eg.

#include <vector>
using std::vector;

int main()
{
vector<int>::it erator it;

return 0;
}


gives an error

[Corey Murtagh]

Re: STL iterators and the std namespace

onion_skin wrote:
[color=blue]
> How do I bring STL iterators into the current scope? eg.
>
> #include <vector>
> using std::vector;
>
> int main()
> {
> vector<int>::it erator it;
>
> return 0;
> }
>
>
> gives an error[/color]

What error, and on what compiler? I tried the above on a few different
compilers with no errors. Comeau's online test also compiles it, albeit
with a warning that 'variable "it" is declared but never referenced'.

--
Corey Murtagh
The Electric Monk
"Quidquid latine dictum sit, altum viditur!"

[onion_skin]

Re: STL iterators and the std namespace

On Wed, 25 Jun 2003 11:06:12 -0400, "Victor Bazarov"
<v.Abazarov@att Abi.com> wrote:
[color=blue]
>"onion_skin " <onion_skin_RMV @travers.com> wrote...[color=green]
>> How do I bring STL iterators into the current scope? eg.
>>
>> #include <vector>
>> using std::vector;
>>
>> int main()
>> {
>> vector<int>::it erator it;
>>
>> return 0;
>> }
>>
>>
>> gives an error[/color]
>
>What error? The code is legal C++ and compiles fine here.
>Perhaps the compiler you're using is not good enough? If
>that's so, try adding 'using namespace std;' in the scope
>of the 'main' function.
>
>Victor
>[/color]


MSVC6.0 gives the error:

"error C2653: 'vector<int,cla ss std::allocator< int> >' : is not a
class or namespace name"

I don't want to use expose the entire library by using 'using
namespace std' (although that, obviously, works)

[Corey Murtagh]

Re: STL iterators and the std namespace

onion_skin wrote:
[color=blue]
> On Wed, 25 Jun 2003 11:06:12 -0400, "Victor Bazarov"
> <v.Abazarov@att Abi.com> wrote:[/color]
<snip>[color=blue][color=green]
>>
>>What error? The code is legal C++ and compiles fine here.
>>Perhaps the compiler you're using is not good enough? If
>>that's so, try adding 'using namespace std;' in the scope
>>of the 'main' function.
>>
>>Victor
>>[/color]
>
>
> MSVC6.0 gives the error:
>
> "error C2653: 'vector<int,cla ss std::allocator< int> >' : is not a
> class or namespace name"[/color]

That's interesting. Worked fine on VC++ 6.0 when I tried it. Are you
sure you posted enough code to replicate the problem?

--
Corey Murtagh
The Electric Monk
"Quidquid latine dictum sit, altum viditur!"

[Victor Bazarov]

Re: STL iterators and the std namespace

"Corey Murtagh" <emonk@slingsho t.co.nz.no.uce> wrote...[color=blue]
> onion_skin wrote:
>[color=green]
> > On Wed, 25 Jun 2003 11:06:12 -0400, "Victor Bazarov"
> > <v.Abazarov@att Abi.com> wrote:[/color]
> <snip>[color=green][color=darkred]
> >>
> >>What error? The code is legal C++ and compiles fine here.
> >>Perhaps the compiler you're using is not good enough? If
> >>that's so, try adding 'using namespace std;' in the scope
> >>of the 'main' function.
> >>
> >>Victor
> >>[/color]
> >
> >
> > MSVC6.0 gives the error:
> >
> > "error C2653: 'vector<int,cla ss std::allocator< int> >' : is not a
> > class or namespace name"[/color]
>
> That's interesting. Worked fine on VC++ 6.0 when I tried it.[/color]

Are you sure? It didn't when I tried it on VC++ v6.0 sp5.
[color=blue]
> Are you
> sure you posted enough code to replicate the problem?[/color]

Are you sure _you_ tried the right code?
---------------------------------------------
#include <vector>

using std::vector;

int main()
{
vector<int>::it erator it;
return 0;
}
---------------------------------------------

Victor

[Tom]

Re: STL iterators and the std namespace

Also compiles without error or warning, using MS Compiler 7.1 (now 97% C++
compliant)

Regards,
Tom

"onion_skin " <onion_skin_RMV @travers.com> wrote in message
news:9gcjfvckb5 oshk8edfta4k119 b0dthlq4v@4ax.c om...[color=blue]
> How do I bring STL iterators into the current scope? eg.
>
> #include <vector>
> using std::vector;
>
> int main()
> {
> vector<int>::it erator it;
>
> return 0;
> }
>
>
> gives an error[/color]

[Corey Murtagh]

Re: STL iterators and the std namespace

Victor Bazarov wrote:
[color=blue]
> "Corey Murtagh" <emonk@slingsho t.co.nz.no.uce> wrote...[/color]
<snip>[color=blue][color=green]
>>
>>That's interesting. Worked fine on VC++ 6.0 when I tried it.[/color]
>
>
> Are you sure? It didn't when I tried it on VC++ v6.0 sp5.
>
>[color=green]
>> Are you
>>sure you posted enough code to replicate the problem?[/color]
>
>
> Are you sure _you_ tried the right code?[/color]

eep... ok, I messed up. Sorry. I guess all those months of typing
'std::' in front of every STL object has gone to my brain.

On the upside, I can confirm that it *does* work on the following compilers:

BCB4
Dev-C++/MinGW32 v2.95.3-6
g++ v2.95.4

Also works on Comeau's online test :)

One work-around for VC++ 6.0:

---------------
#include <vector>
#define vector std::vector

int main()
{
vector<int>::it erator it;

return 0;
}
---------------

Of course this can cause all sorts of problems, but it does appear to
work in this specific case.

--
Corey Murtagh
The Electric Monk
"Quidquid latine dictum sit, altum viditur!"

[onion_skin]

Re: STL iterators and the std namespace

On Wed, 25 Jun 2003 11:44:53 -0400, "Victor Bazarov"
<v.Abazarov@att Abi.com> wrote:
[color=blue]
>"Corey Murtagh" <emonk@slingsho t.co.nz.no.uce> wrote...[color=green]
>> onion_skin wrote:
>>[color=darkred]
>> > On Wed, 25 Jun 2003 11:06:12 -0400, "Victor Bazarov"
>> > <v.Abazarov@att Abi.com> wrote:[/color]
>> <snip>[color=darkred]
>> >>
>> >>What error? The code is legal C++ and compiles fine here.
>> >>Perhaps the compiler you're using is not good enough? If
>> >>that's so, try adding 'using namespace std;' in the scope
>> >>of the 'main' function.
>> >>
>> >>Victor
>> >>
>> >
>> >
>> > MSVC6.0 gives the error:
>> >
>> > "error C2653: 'vector<int,cla ss std::allocator< int> >' : is not a
>> > class or namespace name"[/color]
>>
>> That's interesting. Worked fine on VC++ 6.0 when I tried it.[/color]
>
>Are you sure? It didn't when I tried it on VC++ v6.0 sp5.
>[color=green]
>> Are you
>> sure you posted enough code to replicate the problem?[/color]
>
>Are you sure _you_ tried the right code?
>---------------------------------------------
>#include <vector>
>
>using std::vector;
>
>int main()
>{
> vector<int>::it erator it;
> return 0;
>}
>---------------------------------------------
>
>Victor
>[/color]


This is the code
-------------------------------------------
#include <vector>
using std::vector;


int main()
{
vector<int>::it erator it;

return 0;
}

-------------------------------------------

[John Harrison]

[OT] Re: STL iterators and the std namespace


"Tom" <tom@yahoo.co m> wrote in message
news:bdcg47$r7k mt$1@ID-133116.news.dfn cis.de...[color=blue]
> Also compiles without error or warning, using MS Compiler 7.1 (now 97% C++
> compliant)
>
> Regards,
> Tom
>[/color]

Where do you get 7.1 from? I'm on 7.0.9466 and I reckon I'm only 96%
complaint.

john

[Gavin Deane]

Re: STL iterators and the std namespace

Corey Murtagh <emonk@slingsho t.co.nz.no.uce> wrote in message news:<105655724 2.346679@radsrv 1.tranzpeer.net >...[color=blue]
> Victor Bazarov wrote:
>[color=green]
> > "Corey Murtagh" <emonk@slingsho t.co.nz.no.uce> wrote...[/color]
> <snip>[color=green][color=darkred]
> >>
> >>That's interesting. Worked fine on VC++ 6.0 when I tried it.[/color]
> >
> >
> > Are you sure? It didn't when I tried it on VC++ v6.0 sp5.
> >
> >[color=darkred]
> >> Are you
> >>sure you posted enough code to replicate the problem?[/color]
> >
> >
> > Are you sure _you_ tried the right code?[/color]
>
> eep... ok, I messed up. Sorry. I guess all those months of typing
> 'std::' in front of every STL object has gone to my brain.
>
> On the upside, I can confirm that it *does* work on the following compilers:
>
> BCB4
> Dev-C++/MinGW32 v2.95.3-6
> g++ v2.95.4
>
> Also works on Comeau's online test :)
>
> One work-around for VC++ 6.0:
>
> ---------------
> #include <vector>
> #define vector std::vector
>
> int main()
> {
> vector<int>::it erator it;
>
> return 0;
> }
> ---------------
>
> Of course this can cause all sorts of problems, but it does appear to
> work in this specific case.[/color]

A better (because it doesn't use a macro, buit still irritating
because it shouldn't be necessary at all) work-around for VC++ 6.0:

#include <vector>

int main()
{
std::vector<int >::iterator it;

return 0;
}

This VC++ 6.0 feature has got me into the habit of using fully
qualified names in preference to using declarations.

GJD