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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - implicit instantiation of undefined template basic_streambuf when using istreambuf_iterator"
href="https://llvm.org/bugs/show_bug.cgi?id=28057">28057</a>
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<th>Summary</th>
<td>implicit instantiation of undefined template basic_streambuf when using istreambuf_iterator
</td>
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<th>Product</th>
<td>libc++
</td>
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<th>Version</th>
<td>3.8
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>All Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>jasonliu.development@gmail.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>I tried to compile the following code with libc++ but failed:
#include <iterator>
#include <string>
int main(int argc, char *argv[])
{
std::istreambuf_iterator<char, std::char_traits<char> > myit;
bool b = myit != myit;
return 0;
}
I got the following error message:
error: implicit instantiation of undefined template
'std::__1::basic_streambuf<char, std::__1::char_traits<char> >'
if (__sbuf_ &&
traits_type::eq_int_type(__sbuf_->sgetc(),traits_type::eof()))
^
I think the problem happens because we are trying to call the member function
"sgetc()" in class streambuf. But we only have the forward declaration of class
streambuf.
Notice that when I try to include streambuf header at the beginning of iterator
header, I will get circular reference error(streambuf header includes other
headers that will include iterator header again).</pre>
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