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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - explicit instantiation confused for a function with a deduced return type if it's already been instantiated"
href="http://llvm.org/bugs/show_bug.cgi?id=19551">19551</a>
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<th>Summary</th>
<td>explicit instantiation confused for a function with a deduced return type if it's already been instantiated
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++1y
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>richard-llvm@metafoo.co.uk
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>template<typename T> auto f(T) { return 0; }
int k = f(0); // #1
template auto f(int); // #2
template int f(int); // #3
Without line #1, we accept #2 and reject #3.
With line #1, we reject #2 and accept #3.
Line #2 is valid here, and line #3 is invalid, but apparently the implicit
instantiation confuses us and makes us forget that the return type was written
as 'auto'.</pre>
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