P.J. Plauger wrote:

>
> VC++ V5.0 has enough bugs in member templates to make
> support of the Standard C++ library problematic, so I left 'em
> out. What you can do instead is construct an empty vector,
> then use template function copy to fill the vector, as in:
>
> std::vector<std::string> vs();
> std::copy(ii, eos, std::back_inserter(vs));
>
> (NB: I haven't tested this snipped -- just shooting from the hip.)
>

I don't have MSVC++5.0, but the following works in 6.0.

In addition to your suggested change I had to change the definition of
the istream_iterators. Note that the two lines that had to be changed
cause this to fail under BC++5.02.

=====================================================================
#include <iostream>
#include <fstream>
#include <string>
#include <algorithm>
#include <functional> // would have been needed for less<>
#include <vector>
#include <assert.h>
using namespace std;

int main()
{

   ifstream from("test.txt");
      assert(from);

//   istream_iterator<string, less<string> > ii(from);
//   istream_iterator<string, less<string> > eos;
//
//   the above doesn't work in MSVC++6.0 but the following does...
//
   istream_iterator<string> ii(from);
   istream_iterator<string> eos;

   vector<string> vs;
   copy(ii, eos, back_inserter(vs) );

   return 0;
}
=====================================================================

--
Robert Paulsen                         http://paulsen.home.texas.net
If my return address contains "ZAP." please remove it. Sorry for the
inconvenience but the unsolicited email is getting out of control.


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The, free, egcs-1.1 compiler, http://egcs.cygnus.com,
does compile the sample.

It uses the SGI`s STL, http://www.sgi.com/Technology/STL/.
It`s a free implementation too.

I just did two little modifications to Your code.
The first was necessary for egcs, the second just for a check.

/***************************  CODE  *************************/
#include <iostream>
#include <fstream>
//#include <istream>      (R. K.)
#include <string>
#include <algorithm>
#include <vector>

int main()
{

   std::ifstream from("test.txt");

   if (!from)
   {
      std::cerr << "Could not open test.txt\n";
      exit(1);
   }
   std::istream_iterator<std::string> ii(from);
   std::istream_iterator<std::string> eos;

   std::vector<std::string> vs(ii, eos);

   // For a check.  (R. K.)
   for (size_t i = 0; i < vs.size(); ++i) std::cout << vs[i] << '\n';

   return 0;
}
/************ END OF CODE  ******************************/


$ cat test.txt
Bim bam bom.

$ g++ main.cc
$ a.out
Bim
bam
bom.


Reed Mangino wrote:
>
> On page 61 of Stroustrup's 3rd Edition of _The C++ Programming
> Language_ there is an example very similar to this one:
>
> /***************************  CODE  *************************/
> #include <iostream>
> #include <fstream>
> #include <istream>
> #include <string>
> #include <algorithm>
> #include <vector>
>
> int main()
> {
>
>    std::ifstream from("test.txt");
>
>    if (!from)
>    {
>       std::cerr << "Could not open test.txt\n";
>       exit(1);
>    }
>    std::istream_iterator<std::string> ii(from);
>    std::istream_iterator<std::string> eos;
>
>    std::vector<std::string> vs(ii, eos);
>
>    return 0;
> }
> /************ END OF CODE  ******************************/
>
> The result should be that vs contains the string data that
> was present in the test.txt file.  I have not been able to
> find one C++ compiler that would successfully compile this
> source (I have also tried several STL implementations...)
>
> If you have any ideas... I would be happy to hear them!
> Reed
>


Ryszard Kabatek
--
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Department of Physical Chemistry
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Tel. +49 3461 46 2487 Fax. +49 3461 46 2129
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On page 61 of Stroustrup's 3rd Edition of _The C++ Programming
Language_ there is an example very similar to this one:

/***************************  CODE  *************************/
#include <iostream>
#include <fstream>
#include <istream>
#include <string>
#include <algorithm>
#include <vector>

int main()
{

   std::ifstream from("test.txt");

   if (!from)
   {
      std::cerr << "Could not open test.txt\n";
      exit(1);
   }
   std::istream_iterator<std::string> ii(from);
   std::istream_iterator<std::string> eos;

   std::vector<std::string> vs(ii, eos);

   return 0;
}
/************ END OF CODE  ******************************/

The result should be that vs contains the string data that
was present in the test.txt file.  I have not been able to
find one C++ compiler that would successfully compile this
source (I have also tried several STL implementations...)

Even if I use Stroustrup example verbatim, the results are
the same...

The compiler error that I get from VC++ 5.0 is (and I applogize
for the format of this error, I couldn't find a good way to parse
it so that it would be easy for you to read...)

:\TEMP\streamtest.cpp(21) : error C2664: 'std::vector<class
std::basic_string<char,struct std::char_traits<char>,class
std::allocator<char>>,class std::allocator<class
std::basic_string<char,struct std::char_traits<char>,class
std::allocator<char>>
>>::vector<class std::basic_string<char,struct
std::char_traits<char>,class std::allocator<char>>,class
std::allocator<class std::basic_string<char,struct
std::char_traits<char>,class std::allocator<char>>>>(unsigned int,const
class std::basic_strin
g<char,struct std::char_traits<char>,class std::allocator<char>> &,const
class std::allocator<class std::basic_string<char,struct
std::char_traits<char>,class std::allocator<char>>> &)' : cannot convert
parameter 1 from 'class std::istream_iterator<
class std::basic_string<char,struct std::char_traits<char>,class
std::allocator<char>>,char,struct std::char_traits<char>>' to 'unsigned
int'

If you have any ideas... I would be happy to hear them!
Reed

 --

    ^^-__-^^-__-^^-__-^^-__-^^-__-^^-__-^^-__-^^-__-^^^-__-^^
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                           |  gene pool is that there is
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Reed Mangino <mangino@pandora.planet.net> wrote in article <6u8moo$9u2@jupiter.planet.net>...
>    std::istream_iterator<std::string> ii(from);
>    std::istream_iterator<std::string> eos;
>
>    std::vector<std::string> vs(ii, eos);
> .....
> The result should be that vs contains the string data that
> was present in the test.txt file.  I have not been able to
> find one C++ compiler that would successfully compile this
> source (I have also tried several STL implementations...)

Should work fine with several compilers that use the Dinkum
C++ Library, most notably IBM Visual Age V4.0. The compiler
must support member templates, because you're using the
template constructor:

template<class InIt>
 vector(InIt first, InIt last);

VC++ V5.0 has enough bugs in member templates to make
support of the Standard C++ library problematic, so I left 'em
out. What you can do instead is construct an empty vector,
then use template function copy to fill the vector, as in:

std::vector<std::string> vs();
std::copy(ii, eos, std::back_inserter(vs));

(NB: I haven't tested this snipped -- just shooting from the hip.)

P.J. Plauger
Dinkumware, Ltd.
http://www.dinkumware.com/hot_news.html



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