Based upon the current "standard" couldn't a vector<> be
initialized using two istream_iterator objects?

For example:

int main()
{
   ifstream is("test.txt");
   istream_iterator<string> ii(is);
   istream_iterator<string> eos; // used like EOF

   vector<string> strvec(ii, eos); // should read in file

   return 0;
}

Many STL implementations that I have seen have a vector constructor
that takes two const_iterators, others use a template member.
Could someone please explain why the above code is "non-standard"?

Thank you,
Reed

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mangino@saturn.planet.net (Reed Mangino) wrote:

>Based upon the current "standard" couldn't a vector<> be
>initialized using two istream_iterator objects?

Yes, assuming your compiler supports template member functions.

[... code snipped ...]

>Could someone please explain why the above code is "non-standard"?

It is standard.  However, it won't work unless your compiler supports
template member functions and your standard library implementation is
aware of this support.

--Bob

====================================================================
Bob Steagall                                 steagall@deltalogic.com
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