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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Feature request: warn about unnecessary comparison to nullptr"
href="https://bugs.llvm.org/show_bug.cgi?id=47018">47018</a>
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<th>Summary</th>
<td>Feature request: warn about unnecessary comparison to nullptr
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>federico.kircheis@gmail.com
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>Clang warns in some contexts about unnecessary comparisons to nullptr, like
----
int main(){
int i = 42;
&i != nullptr;
}
----
but it does not when comparing function references:
----
void foo(){}
int main(){
void(&f)() = foo;
return f != nullptr;
}
----
(compiled with "-Weverything -Wno-c++98-compat -Wno-missing-prototypes
-Wno-c++98-compat-pedantic")
<a href="https://godbolt.org/z/nEbcbM">https://godbolt.org/z/nEbcbM</a>
For reference, GCC does emit a warning through the switch "-Waddress".</pre>
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