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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang cannot parse xstring in Visual Studio 2017"
href="https://bugs.llvm.org/show_bug.cgi?id=33735">33735</a>
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<th>Summary</th>
<td>Clang cannot parse xstring in Visual Studio 2017
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>libclang
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>dpldobrev@protonmail.com
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</tr>
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<th>CC</th>
<td>klimek@google.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>I get the following error when parsing:
c:/Program Files (x86)/Microsoft Visual
Studio/2017/Community/VC/Tools/MSVC/14.10.25017/include\xstring:1905:26: error:
constexpr variable '_Memcpy_move_offset' must be initialized by a constant
expression
static constexpr size_t _Memcpy_move_offset = offsetof(_Mydata_t, _Bx);
^ ~~~~~~~~~~~~~~~~~~~~~~~~
I understand this is a non-conforming C++ construct. However, shouldn't there
be a way for Clang to cope with it by using a certain set of flags? Shouldn't
"-fms-extensions" and/or "-fms-compatibility" have worked?
The same bug has been asked about at
<a href="http://clang-developers.42468.n3.nabble.com/Working-around-unconformant-offsetof-in-msvc-td4056311.html">http://clang-developers.42468.n3.nabble.com/Working-around-unconformant-offsetof-in-msvc-td4056311.html</a>
.</pre>
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</p>
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