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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - DR 1510 not implemented"
href="https://llvm.org/bugs/show_bug.cgi?id=23004">23004</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>DR 1510 not implemented
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>C++14
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>hstong@ca.ibm.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The "const" is supposed to be ignored according to
<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1510">http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#1510</a>.
The error indicates that Clang is keeping the "const" around.
### SOURCE (<stdin>):
extern int &&a;
typedef const decltype(a) TR;
typedef int &&TR;
### COMPILER INVOCATION:
clang++ -cc1 -std=c++14 -x c++ -
### ACTUAL OUTPUT:
<stdin>:3:15: error: typedef redefinition with different types ('int &&' vs
'const decltype(a)' (aka 'int &&const'))
typedef int &&TR;
^
<stdin>:2:27: note: previous definition is here
typedef const decltype(a) TR;
^
1 error generated.
### EXPECTED OUTPUT:
(Compiles successfully).
### COMPILER VERSION INFO:
clang version 3.7.0 (trunk 232951)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation:
/usr/local/gcc-4.8.2/lib/gcc/x86_64-unknown-linux-gnu/4.8.2
Selected GCC installation:
/usr/local/gcc-4.8.2/lib/gcc/x86_64-unknown-linux-gnu/4.8.2
Candidate multilib: .;@m64
Selected multilib: .;@m64</pre>
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