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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 WORKSFORME - variable reassignment in switch not detected ?"
href="http://llvm.org/bugs/show_bug.cgi?id=20950">bug 20950</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>rnk@google.com
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>WORKSFORME
</td>
</tr></table>
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<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WORKSFORME - variable reassignment in switch not detected ?"
href="http://llvm.org/bugs/show_bug.cgi?id=20950#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WORKSFORME - variable reassignment in switch not detected ?"
href="http://llvm.org/bugs/show_bug.cgi?id=20950">bug 20950</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>We have a related warning under -Wimplicit-fallthrough, but it isn't on by
default due to false positives on existing code bases.
$ clang++ t.cpp -c -Wimplicit-fallthrough
t.cpp:8:5: warning: unannotated fall-through between switch labels
[-Wimplicit-fallthrough]
case 2: m = 3;
^
t.cpp:8:5: note: insert '[[clang::fallthrough]];' to silence this warning
case 2: m = 3;
^
[[clang::fallthrough]];
t.cpp:8:5: note: insert 'break;' to avoid fall-through
case 2: m = 3;
^
break;
t.cpp:9:5: warning: unannotated fall-through between switch labels
[-Wimplicit-fallthrough]
case 3: m = 4;
^
t.cpp:9:5: note: insert '[[clang::fallthrough]];' to silence this warning
case 3: m = 4;
^
[[clang::fallthrough]];
t.cpp:9:5: note: insert 'break;' to avoid fall-through
case 3: m = 4;
^
break;
t.cpp:10:5: warning: unannotated fall-through between switch labels
[-Wimplicit-fallthrough]
case 4: m = 5;
^
t.cpp:10:5: note: insert '[[clang::fallthrough]];' to silence this warning
case 4: m = 5;
^
[[clang::fallthrough]];
t.cpp:10:5: note: insert 'break;' to avoid fall-through
case 4: m = 5;
^
break;
3 warnings generated.</pre>
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