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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - NeverDestroyed<> constructor does not pass std::initializer_list correctly"
href="https://bugs.webkit.org/show_bug.cgi?id=157452">157452</a>
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<th>Summary</th>
<td>NeverDestroyed<> constructor does not pass std::initializer_list correctly
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>Other
</td>
</tr>
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<th>Hardware</th>
<td>Unspecified
</td>
</tr>
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<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
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<th>Priority</th>
<td>P2
</td>
</tr>
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<th>Component</th>
<td>Web Template Framework
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jer.noble@apple.com
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=278325" name="attach_278325" title="TestCase.cpp">attachment 278325</a> <a href="attachment.cgi?id=278325&action=edit" title="TestCase.cpp">[details]</a></span>
TestCase.cpp
The following code fails to compile:
#include <wtf/NeverDestroyed.h>
#include <wtf/Vector.h>
int main()
{
Vector<int> v1 = {1, 2, 3}; // OK
NeverDestroyed<Vector<int>> v2 = {1, 2, 3}; // "error: no matching constructor for initialization of 'WTF::Vector<int, 0, WTF::CrashOnOverflow, 16>"
return 0;
}
This is likely because the "std::forward<Args>(args)..." in the NeverDestroyed constructor unrolls the initializer_list into a sequence of parameters, rather than passing it unadulterated.</pre>
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