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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Diagnostic enhancement: "auto" in lambda expression under -std=c++11"
href="https://bugs.llvm.org/show_bug.cgi?id=46714">46714</a>
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<th>Summary</th>
<td>Diagnostic enhancement: "auto" in lambda expression under -std=c++11
</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>Linux
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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
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<th>Component</th>
<td>Frontend
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>haoxintu@gmail.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<pre>Hi, all.
"auto" used in lambda expression is a c++14 extension, but clang doesn't emit
the appropriate diagnostic message about it.
For example,
$cat test.cc
int main(){
auto var = [](auto){};
return 0;
}
$clang++ -std=c++11 -c test.cc
test.cc:2:19: error: 'auto' not allowed in lambda parameter
auto var = [](auto){};
^~~~
1 error generated.
I guess clang should give a more specific diagnostic about this like GCC.
$g++ -std=c++11 -c test.cc
test.cc: In function ‘int main()’:
test.cc:2:19: error: use of ‘auto’ in lambda parameter declaration only
available with ‘-std=c++14’ or ‘-std=gnu++14’
2 | auto var = [](auto){};
| ^~~~
Just a small enhancement I guess, please understand if anything I stated is
unsuitable.
Thanks,
Haoxin</pre>
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