<html>
<head>
<base href="http://llvm.org/bugs/" />
</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 --- - clang errors when using Objective-C objects in C++ containers."
href="http://llvm.org/bugs/show_bug.cgi?id=20077">20077</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang errors when using Objective-C objects in C++ containers.
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>FreeBSD
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>chmeeedalf@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>When compiling the following program using: clang++ -c test.mm -O0 -fobjc-arc
#include <unordered_map>
extern id foo;
extern id bar;
int main()
{
std::unordered_map<__strong id,int> idmap;
idmap[foo] = 0;
}
I see the following errors:
/usr/include/c++/v1/memory:3399:13: error: '__t' is unavailable: this system
field has retaining ownership
__u.__t = __v;
^
/usr/include/c++/v1/unordered_map:384:17: note: in instantiation of member
function 'std::__1::hash<id>::operator()' requested here
{return static_cast<const _Hash&>(*this)(__x);}
^
/usr/include/c++/v1/__hash_table:2020:21: note: in instantiation of member
function 'std::__1::__unordered_map_hasher<id, std::__1::__hash_value_type<id,
int>, std::__1::hash<id>, true>::operator()' requested here
size_t __hash = hash_function()(__k);
^
/usr/include/c++/v1/unordered_map:970:69: note: in instantiation of function
template specialization 'std::__1::__hash_table<std::__1::__hash_value_type<id,
int>, std::__1::__unordered_map_hasher<id,
std::__1::__hash_value_type<id, int>, std::__1::hash<id>, true>,
std::__1::__unordered_map_equal<id, std::__1::__hash_value_type<id, int>,
std::__1::equal_to<id>, true>,
std::__1::allocator<std::__1::__hash_value_type<id, int> > >::find<id>'
requested here
iterator find(const key_type& __k) {return __table_.find(__k);}
^
/usr/include/c++/v1/unordered_map:1360:20: note: in instantiation of member
function 'std::__1::unordered_map<id, int, std::__1::hash<id>,
std::__1::equal_to<id>, std::__1::allocator<std::__1::pair<const id, int> >
>::find' requested here
iterator __i = find(__k);
^
test.mm:10:7: note: in instantiation of member function
'std::__1::unordered_map<id, int, std::__1::hash<id>, std::__1::equal_to<id>,
std::__1::allocator<std::__1::pair<const id, int> > >::operator[]' requested
here
idmap[foo] = 0;
^
/usr/include/c++/v1/memory:3396:18: note: declaration has been explicitly
marked unavailable here
_Tp* __t;
^
In file included from test.mm:1:
/usr/include/c++/v1/unordered_map:1338:36: error: call to 'addressof' is
ambiguous
__node_traits::construct(__na, _VSTD::addressof(__h->__value_.__cc.first),
__k);
^~~~~~~~~~~~~~~~
/usr/include/c++/v1/__config:341:15: note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
/usr/include/c++/v1/unordered_map:1363:25: note: in instantiation of member
function 'std::__1::unordered_map<id, int, std::__1::hash<id>,
std::__1::equal_to<id>, std::__1::allocator<std::__1::pair<const id, int> >
>::__construct_node_with_key' requested here
__node_holder __h = __construct_node_with_key(__k);
^
test.mm:10:7: note: in instantiation of member function
'std::__1::unordered_map<id, int, std::__1::hash<id>, std::__1::equal_to<id>,
std::__1::allocator<std::__1::pair<const id, int> > >::operator[]' requested
here
idmap[foo] = 0;
^
/usr/include/c++/v1/__functional_base:96:1: note: candidate function [with _Tp
= const id]
addressof(__strong _Tp& __x) _NOEXCEPT
^
/usr/include/c++/v1/__functional_base:122:1: note: candidate function [with _Tp
= const id]
addressof(__unsafe_unretained _Tp& __x) _NOEXCEPT
^
/usr/include/c++/v1/__functional_base:83:1: note: candidate function [with _Tp
= const id]
addressof(_Tp& __x) _NOEXCEPT
^
In file included from test.mm:1:
/usr/include/c++/v1/unordered_map:522:44: error: call to 'addressof' is
ambiguous
__alloc_traits::destroy(__na_,
_VSTD::addressof(__p->__value_.__cc.first));
^~~~~~~~~~~~~~~~
/usr/include/c++/v1/__config:341:15: note: expanded from macro '_VSTD'
#define _VSTD std::_LIBCPP_NAMESPACE
^
/usr/include/c++/v1/memory:2625:13: note: in instantiation of member function
'std::__1::__hash_map_node_destructor<std::__1::allocator<std::__1::__hash_node<std::__1::__hash_value_type<id,
int>, void *> >
>::operator()' requested here
__ptr_.second()(__tmp);
^
/usr/include/c++/v1/memory:2593:46: note: in instantiation of member function
'std::__1::unique_ptr<std::__1::__hash_node<std::__1::__hash_value_type<id,
int>, void *>,
std::__1::__hash_map_node_destructor<std::__1::allocator<std::__1::__hash_node<std::__1::__hash_value_type<id,
int>, void *> > > >::reset' requested here
_LIBCPP_INLINE_VISIBILITY ~unique_ptr() {reset();}
^
/usr/include/c++/v1/unordered_map:1363:25: note: in instantiation of member
function
'std::__1::unique_ptr<std::__1::__hash_node<std::__1::__hash_value_type<id,
int>, void *>,
>::operator()' requested here
__ptr_.second()(__tmp);
^
/usr/include/c++/v1/memory:2593:46: note: in instantiation of member function
'std::__1::unique_ptr<std::__1::__hash_node<std::__1::__hash_value_type<id,
int>, void *>,
std::__1::__hash_map_node_destructor<std::__1::allocator<std::__1::__hash_node<std::__1::__hash_value_type<id,
int>, void *> > > >::reset' requested here
_LIBCPP_INLINE_VISIBILITY ~unique_ptr() {reset();}
^
/usr/include/c++/v1/unordered_map:1363:25: note: in instantiation of member
function
'std::__1::unique_ptr<std::__1::__hash_node<std::__1::__hash_value_type<id,
int>, void *>,
std::__1::__hash_map_node_destructor<std::__1::allocator<std::__1::__hash_node<std::__1::__hash_value_type<id,
int>, void *> > > >::~unique_ptr' requested here
__node_holder __h = __construct_node_with_key(__k);
^
test.mm:10:7: note: in instantiation of member function
'std::__1::unordered_map<id, int, std::__1::hash<id>, std::__1::equal_to<id>,
std::__1::allocator<std::__1::pair<const id, int> > >::operator[]' requested
here
idmap[foo] = 0;
^
/usr/include/c++/v1/__functional_base:96:1: note: candidate function [with _Tp
= const id]
addressof(__strong _Tp& __x) _NOEXCEPT
^
/usr/include/c++/v1/__functional_base:122:1: note: candidate function [with _Tp
= const id]
addressof(__unsafe_unretained _Tp& __x) _NOEXCEPT
^
/usr/include/c++/v1/__functional_base:83:1: note: candidate function [with _Tp
= const id]
addressof(_Tp& __x) _NOEXCEPT
^
3 errors generated.
This compiled with clang 3.3 in FreeBSD, and the associated libc++. This
failure occurs with
FreeBSD clang version 3.4 (tags/RELEASE_34/final 197956) 20140216
And the associated libc++
This error also does not occur when -fobjc-arc is not specified.</pre>
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