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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Clang-cl checks on copy-constructor on during initialization"
href="https://llvm.org/bugs/show_bug.cgi?id=26007">26007</a>
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<th>Summary</th>
<td>Clang-cl checks on copy-constructor on during initialization
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>jvapen@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Hi,
I'm trying to get some existing MSVC code compiled with clang-cl.
Apparently one of the 'features' of MSVC is that it optimizes initialization
assignment, without checking copy constructor...
Clang correctly checks on this, though clang-cl does this too, which is
unfortunate for existing MSVC code bases.
Following code compiles with MSVC2013 and MSVC2015 and fails with both clang-cl
as clang+c2 (provided by MS)
----------------------------------------
Code
----------------------------------------
#include <atomic>
int main()
{
std::atomic<bool> b = true;
return static_cast<int>(b.load());
}
----------------------------------------
Generated error
----------------------------------------
1>MoveSemantics.cpp(10,22): error : copying variable of type
'std::atomic<bool>' invokes deleted constructor
1> std::atomic<bool> b = true;
1> ^ ~~~~
1> C:\Program Files (x86)\Microsoft Visual Studio
14.0\VC\include\xxatomic(188,2) : note: 'atomic' has been explicitly marked
deleted here
1> atomic(const atomic&) = delete;
1> ^
1> 1 error generated.</pre>
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