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<body><span class="vcard"><a class="email" href="mailto:george.burgess.iv@gmail.com" title="George Burgess <george.burgess.iv@gmail.com>"> <span class="fn">George Burgess</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WORKSFORME - Should immediately reading from a consumed object provoke a warning?"
href="https://llvm.org/bugs/show_bug.cgi?id=31234">bug 31234</a>
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<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>george.burgess.iv@gmail.com
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>WORKSFORME
</td>
</tr></table>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WORKSFORME - Should immediately reading from a consumed object provoke a warning?"
href="https://llvm.org/bugs/show_bug.cgi?id=31234#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WORKSFORME - Should immediately reading from a consumed object provoke a warning?"
href="https://llvm.org/bugs/show_bug.cgi?id=31234">bug 31234</a>
from <span class="vcard"><a class="email" href="mailto:george.burgess.iv@gmail.com" title="George Burgess <george.burgess.iv@gmail.com>"> <span class="fn">George Burgess</span></a>
</span></b>
<pre>Thanks for the report! Looks like clang-tidy's misc-use-after-move check
catches things like this, though. :)
$ cat /tmp/tc.cpp
#include <iostream>
#include <utility>
#include <vector>
int main(int, char**) {
std::string a("hello");
std::vector<std::string> x;
x.emplace_back(std::move(a));
if (a == "hello") {
std::cout << "a retains original value" << std::endl;
}
return 0;
}
$ ./bin/clang-tidy /tmp/tc.cpp -extra-arg=-std=c++11
-checks=misc-use-after-move
Error while trying to load a compilation database:
Could not auto-detect compilation database for file "/tmp/tc.cpp"
No compilation database found in /tmp or any parent directory
json-compilation-database: Error while opening JSON database: No such file or
directory
Running without flags.
1 warning generated.
/tmp/tc.cpp:10:7: warning: 'a' used after it was moved [misc-use-after-move]
if (a == "hello") {
^
/tmp/tc.cpp:8:5: note: move occurred here
x.emplace_back(std::move(a));
^</pre>
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