Re: [boost] [RangeEx] Using istream_range?

Subject: Re: [boost] [RangeEx] Using istream_range?
From: Robert Jones (robertgbjones_at_[hidden])
Date: 2008-10-22 08:59:43

Hi Neil

Another one for you....

This may not be entirely due to your lib, but it is a fairly obvious
use-case.
This code works fine....

#include <iostream>
#include <iterator>
#include <list>
#include "boost/range.hpp"
#include "boost/range/istream_range.hpp"
#include "boost/range/algorithm.hpp"
#include "boost/range/adaptors.hpp"
#include "boost/lambda/lambda.hpp"

using namespace boost;
using namespace boost :: lambda;

int times_two( int i ) { return ( _1 * 2 )( i ); }

int main( )
{
  int vals[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

  copy(
      vals | adaptors :: transformed( times_two ),
      std :: ostream_iterator< int >( std :: cout, "\n" ) );
  return 0;
}

But this code doesn't....

#include <iostream>
#include <iterator>
#include <list>
#include "boost/range.hpp"
#include "boost/range/istream_range.hpp"
#include "boost/range/algorithm.hpp"
#include "boost/range/adaptors.hpp"
#include "boost/lambda/lambda.hpp"

using namespace boost;
using namespace boost :: lambda;

int times_two( int i ) { return ( _1 * 2 )( i ); }

int main( )
{
  int vals[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

  copy(
      vals | adaptors :: transformed( _1 * 2 ),
      std :: ostream_iterator< int >( std :: cout, "\n" ) );
  return 0;
}

I have sent you the full error privately as Boost bounced the file due to it
being too large!

Cheers, Rob.