Why can't I construct an std::istream_iterator with an unnamed temporary?
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by Stumped6789
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Published on 2010-05-06T16:52:04Z
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2010/05/06
16:58 UTC
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g++ allows this construction of an istream_iterator from an ifstream instance:
std::ifstream ifstr("test.txt");
std::istream_iterator<std::string> iter1(ifstr);
...but it doesn't allow the same construction with an unnamed temporary:
std::istream_iterator<std::string> iter2(std::ifstream("test.txt"));
This gives:
error: no matching function for call to ‘std::istream_iterator, ptrdiff_t>::istream_iterator(std::ifstream)’
Does anyone know why this doesn't work? - thanks!
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