Re: stl copy and istream_iterator and operator >>

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From	Ian Collins <ian-news@hotmail.com>
Newsgroups	comp.lang.c++
Subject	Re: stl copy and istream_iterator and operator >>
Date	Mon, 19 Sep 2011 10:11:30 +1200
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On 09/19/11 09:47 AM, Ian Collins wrote:
> On 09/19/11 09:27 AM, persres@googlemail.com wrote:
>> Hi,
>>       I have the following code -
>>
>> string str("12 3213 asdf 21");
>> vector<int>   v;
>>
>> copy(istream_iterator<int>(istringstream(str)) ,
>> istream_iterator<int>(),  back_inserter(v) );
>
> This shouldn't compile. You can't create an istream_iterator from a
> temporary.
>
>> I expected copy to throw because the operator>>   would have failed due
>> to the 'asdf' string present.
>
> Which operator>>?

I wasn't being very helpful there (Monday morning). 
std::istream_iterator will stop after the first extraction failure, so 
if you want more error checking you will have to roll your own.

-- 
Ian Collins

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stl copy and  istream_iterator and operator >> "persres@googlemail.com" <persres@gmail.com> - 2011-09-18 14:27 -0700
  Re: stl copy and  istream_iterator and operator >> Ian Collins <ian-news@hotmail.com> - 2011-09-19 09:47 +1200
    Re: stl copy and istream_iterator and operator >> "persres@googlemail.com" <persres@gmail.com> - 2011-09-18 14:53 -0700
      Re: stl copy and istream_iterator and operator >> Ian Collins <ian-news@hotmail.com> - 2011-09-19 10:00 +1200
        Re: stl copy and istream_iterator and operator >> "persres@googlemail.com" <persres@gmail.com> - 2011-09-18 15:11 -0700
          Re: stl copy and istream_iterator and operator >> red floyd <no.spam.here@its.invalid> - 2011-09-18 15:23 -0700
          Re: stl copy and istream_iterator and operator >> Ian Collins <ian-news@hotmail.com> - 2011-09-19 10:23 +1200
            Re: stl copy and istream_iterator and operator >> James Kanze <james.kanze@gmail.com> - 2011-09-19 15:19 -0700
    Re: stl copy and  istream_iterator and operator >> Ian Collins <ian-news@hotmail.com> - 2011-09-19 10:11 +1200

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