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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Failure to deduce std::initializer_list<T> from {"foo","bar"} when T is a parameter pack"
href="http://llvm.org/bugs/show_bug.cgi?id=18047">18047</a>
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</tr>
<tr>
<th>Summary</th>
<td>Failure to deduce std::initializer_list<T> from {"foo","bar"} when T is a parameter pack
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++11
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>Casey@Carter.net
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=11600" name="attach_11600" title="Test case.">attachment 11600</a> <a href="attachment.cgi?id=11600&action=edit" title="Test case.">[details]</a></span>
Test case.
This program is compiled correctly:
#include <initializer_list>
template <typename T>
void function(std::initializer_list<T>) {
}
int main() {
function({"foo", "bar"});
}
This program fails to compile:
#include <initializer_list>
template <typename... T>
void function(std::initializer_list<T>...) {
}
int main() {
function({"foo", "bar"});
}
instead reporting a compile error:
main.cpp:8:5: error: no matching function for call to 'function'
function({"foo", "bar"});
^~~~~~~~
main.cpp:4:6: note: candidate function [with T = <char const[4]>] not viable:
no known conversion from 'const char [4]' to 'char const[4]' for 1st argument
void function(std::initializer_list<T>...) {
^
1 error generated.
It appears that the compiler is failing to perform the array-to-pointer
conversion step of the deduction per [temp.deduct.call]/2, but only when the
type being deduced is part of a parameter pack.</pre>
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