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<body><span class="vcard"><a class="email" href="mailto:rnk@google.com" title="Reid Kleckner <rnk@google.com>"> <span class="fn">Reid Kleckner</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - Allow reinterpret_cast in constant expression when -fms-compatibility is enabled"
href="https://bugs.llvm.org/show_bug.cgi?id=17410">bug 17410</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Resolution</td>
<td>---
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<td>WONTFIX
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>RESOLVED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - Allow reinterpret_cast in constant expression when -fms-compatibility is enabled"
href="https://bugs.llvm.org/show_bug.cgi?id=17410#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - Allow reinterpret_cast in constant expression when -fms-compatibility is enabled"
href="https://bugs.llvm.org/show_bug.cgi?id=17410">bug 17410</a>
from <span class="vcard"><a class="email" href="mailto:rnk@google.com" title="Reid Kleckner <rnk@google.com>"> <span class="fn">Reid Kleckner</span></a>
</span></b>
<pre>MSVC has warned on this since 19.15: <a href="https://gcc.godbolt.org/z/ToG3o4">https://gcc.godbolt.org/z/ToG3o4</a>
<a href="https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4668?view=msvc-160">https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4668?view=msvc-160</a>
warning C4644: usage of the macro-based offsetof pattern in constant
expressions is non-standard; use offsetof defined in the C++ standard library
instead
Someone filed a similar issue with microsoft:
<a href="https://developercommunity.visualstudio.com/t/field-offset-macro-in-winnth-can-generate-c4644-an/331780">https://developercommunity.visualstudio.com/t/field-offset-macro-in-winnth-can-generate-c4644-an/331780</a>
At this point, I don't think clang needs to implement an extension for this.</pre>
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