https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81964
Bug ID: 81964
Summary: istream_iterator: unexpected read in ctor
Product: gcc
Version: 6.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: abominable-snowman at yandex dot ru
CC: abominable-snowman at yandex dot ru
Target Milestone: ---
CC: abominable-snowman at yandex dot ru
istream_iterator do unexpected read from stream when initialized by istream&:
/// Construct start of input stream iterator.
istream_iterator(istream_type& __s)
: _M_stream(&__s)
{ _M_read(); }
but expected, that read happens on dereference at least.
See:
std::istringstream s("1 2");
std::istream_iterator<int> ii1(s);
std::istream_iterator<int> ii2(s);
VERIFY( *ii2 == 1 );
VERIFY( *ii1 == 2 );
--- Comment #1 from Petr Ovtchenkov <abominable-snowman at yandex dot ru> ---
Created attachment 42035
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42035&action=edit
proposed solution and test
