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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - static method invocation via objects are not considered constexpr"
href="https://llvm.org/bugs/show_bug.cgi?id=31624">31624</a>
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<th>Summary</th>
<td>static method invocation via objects are not considered constexpr
</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
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++14
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>matt@godbolt.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Consider the following (unusual) code:
struct Foo { static constexpr bool hasBar() { return true; } };
void test(const Foo &f) {
static_assert(Foo::hasBar(), ""); // -is ok
static_assert(f.hasBar(), ""); // fails on clang trunk 291576, works in GCC
}
(also on <a href="https://godbolt.org/g/qwzYvc">https://godbolt.org/g/qwzYvc</a> )
All clang versions I tested it on fail with "error: static_assert expression is
not an integral constant expression". GCC and CL both allow this and consider
the call to the static method hasBar via the actual object f to be constexpr.
It's not clear to me which behaviour is correct, though instinctively I'd
imagine it to be valid to allow such calls as constexpr.</pre>
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