<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - unordered_set<std::pair<int, int>> initialiser list constructor."
href="https://bugs.llvm.org/show_bug.cgi?id=32096">32096</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>unordered_set<std::pair<int, int>> initialiser list constructor.
</td>
</tr>
<tr>
<th>Product</th>
<td>libc++
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>denis.yaroshevskij@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org, mclow.lists@gmail.com
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=18034" name="attach_18034" title="code">attachment 18034</a> <a href="attachment.cgi?id=18034&action=edit" title="code">[details]</a></span>
code
Attached code fails to compile for unordered set and works for other standard
containers.
Seems like a bug.
Error message:
clang++ --std=c++11 ~/unordered_set_bug.cc
In file included from /Users/dyaroshev/unordered_set_bug.cc:1:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/unordered_set:323:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__hash_table:16:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:599:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/type_traits:1008:38:
error: implicit instantiation of undefined
template 'std::__1::hash<std::__1::pair<int, int> >'
: public integral_constant<bool, __is_empty(_Tp)> {};
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2008:40:
note: in instantiation of template class
'std::__1::is_empty<std::__1::hash<std::__1::pair<int, int> > >'
requested here
bool = is_empty<_T2>::value
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2028:44:
note: in instantiation of default argument for
'__libcpp_compressed_pair_switch<unsigned long,
std::__1::hash<std::__1::pair<int, int> >, false, false>' required here
template <class _T1, class _T2, unsigned = __libcpp_compressed_pair_switch<_T1,
_T2>::value>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2396:15:
note: in instantiation of default argument for
'__libcpp_compressed_pair_imp<unsigned long,
std::__1::hash<std::__1::pair<int, int> > >' required here
: private __libcpp_compressed_pair_imp<_T1, _T2>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__hash_table:969:59:
note: in instantiation of template class
'std::__1::__compressed_pair<unsigned long,
std::__1::hash<std::__1::pair<int, int> > >' requested here
__compressed_pair<size_type, hasher> __p2_;
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/unordered_set:353:13:
note: in instantiation of template class
'std::__1::__hash_table<std::__1::pair<int, int>,
std::__1::hash<std::__1::pair<int, int> >,
std::__1::equal_to<std::__1::pair<int, int> >,
std::__1::allocator<std::__1::pair<int, int> > >' requested here
__table __table_;
^
/Users/dyaroshev/unordered_set_bug.cc:8:15: note: in instantiation of template
class 'std::__1::unordered_set<std::__1::pair<int, int>,
std::__1::hash<std::__1::pair<int, int> >,
std::__1::equal_to<std::__1::pair<int, int> >,
std::__1::allocator<std::__1::pair<int, int> > >' requested here
Container input;
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:3159:29:
note: template is declared here
template <class _Tp> struct hash;
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2008:55:
error: no member named 'value' in
'std::__1::is_empty<std::__1::hash<std::__1::pair<int, int> > >'
bool = is_empty<_T2>::value
~~~~~~~~~~~~~~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2028:44:
note: in instantiation of default argument for
'__libcpp_compressed_pair_switch<unsigned long,
std::__1::hash<std::__1::pair<int, int> >, false, false>' required here
template <class _T1, class _T2, unsigned = __libcpp_compressed_pair_switch<_T1,
_T2>::value>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2398:13:
note: in instantiation of default argument for
'__libcpp_compressed_pair_imp<unsigned long,
std::__1::hash<std::__1::pair<int, int> > >' required here
typedef __libcpp_compressed_pair_imp<_T1, _T2> base;
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__hash_table:969:59:
note: in instantiation of template class
'std::__1::__compressed_pair<unsigned long,
std::__1::hash<std::__1::pair<int, int> > >' requested here
__compressed_pair<size_type, hasher> __p2_;
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/unordered_set:353:13:
note: in instantiation of template class
'std::__1::__hash_table<std::__1::pair<int, int>,
std::__1::hash<std::__1::pair<int, int> >,
std::__1::equal_to<std::__1::pair<int, int> >,
std::__1::allocator<std::__1::pair<int, int> > >' requested here
__table __table_;
^
/Users/dyaroshev/unordered_set_bug.cc:8:15: note: in instantiation of template
class 'std::__1::unordered_set<std::__1::pair<int, int>,
std::__1::hash<std::__1::pair<int, int> >,
std::__1::equal_to<std::__1::pair<int, int> >,
std::__1::allocator<std::__1::pair<int, int> > >' requested here
Container input;
^
In file included from /Users/dyaroshev/unordered_set_bug.cc:1:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/unordered_set:323:
In file included from
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__hash_table:16:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2412:40:
error: multiple overloads of '__compressed_pair'
instantiate to the same signature 'void (_T2_param)' (aka 'void (int)')
_LIBCPP_INLINE_VISIBILITY explicit __compressed_pair(_T2_param __t2)
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__hash_table:969:59:
note: in instantiation of template class
'std::__1::__compressed_pair<unsigned long,
std::__1::hash<std::__1::pair<int, int> > >' requested here
__compressed_pair<size_type, hasher> __p2_;
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/unordered_set:353:13:
note: in instantiation of template class
'std::__1::__hash_table<std::__1::pair<int, int>,
std::__1::hash<std::__1::pair<int, int> >,
std::__1::equal_to<std::__1::pair<int, int> >,
std::__1::allocator<std::__1::pair<int, int> > >' requested here
__table __table_;
^
/Users/dyaroshev/unordered_set_bug.cc:8:15: note: in instantiation of template
class 'std::__1::unordered_set<std::__1::pair<int, int>,
std::__1::hash<std::__1::pair<int, int> >,
std::__1::equal_to<std::__1::pair<int, int> >,
std::__1::allocator<std::__1::pair<int, int> > >' requested here
Container input;
^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:2410:40:
note: previous declaration is here
_LIBCPP_INLINE_VISIBILITY explicit __compressed_pair(_T1_param __t1)
^
3 errors generated.</pre>
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