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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - std::string_view::find in constexpr function is not constant expression"
href="https://bugs.llvm.org/show_bug.cgi?id=50402">50402</a>
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<th>Summary</th>
<td>std::string_view::find in constexpr function is not constant expression
</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>All
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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
</td>
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<th>Component</th>
<td>C++2b
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>hewillk@gmail.com
</td>
</tr>
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<th>CC</th>
<td>blitzrakete@gmail.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>The following code fails in trunk:
<a href="https://godbolt.org/z/zKjnMsqP9">https://godbolt.org/z/zKjnMsqP9</a>
#include <string_view>
template <class>
constexpr bool g() {
std::string_view s = " ";
s.find(" ");
return true;
}
constexpr bool b = g<void>(); // ok
template <class T> concept C = g<T>();
static_assert(C<void>); // error</pre>
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