<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 --- - std::is_function<void()const> faild"
href="http://llvm.org/bugs/show_bug.cgi?id=20084">20084</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>std::is_function<void()const> faild
</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>Windows NT
</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>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>y121516@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu, mclow.lists@gmail.com
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>On clang HEAD and libcxx trunk, complile failed.
source:
#include<type_traits>
static_assert(std::is_function<void()const>{}, "");
int main(){}
compiler messages:
In file included from prog.cc:1:
/usr/local/libcxx-head/include/c++/v1/type_traits:438:83: error: no matching
function for call to '__source'
: public integral_constant<bool,
sizeof(__libcpp_is_function_imp::__test<_Tp>(__libcpp_is_function_imp::__source<_Tp>()))
== 1>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/local/libcxx-head/include/c++/v1/type_traits:443:14: note: in
instantiation of template class 'std::__1::__libcpp_is_function<void () const,
false>' requested here
: public __libcpp_is_function<_Tp> {};
^
prog.cc:3:15: note: in instantiation of template class
'std::__1::is_function<void () const>' requested here
static_assert(std::is_function<void()const>{}, "");
^
/usr/local/libcxx-head/include/c++/v1/type_traits:429:28: note: candidate
template ignored: substitution failure [with _Tp = void () const]: reference to
function type 'void () const' cannot have 'const' qualifier
template <class _Tp> _Tp& __source();
~~~ ^
1 error generated.
It seems problem point is __libcpp_is_function_imp::__source function template
and changing clang behavior 3.4 to HEAD.
please see: <a href="http://melpon.org/wandbox/permlink/7goraqrqNXsdOdLK">http://melpon.org/wandbox/permlink/7goraqrqNXsdOdLK</a></pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>