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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - template parameter lookup differs from g++ wrt. constness"
href="https://bugs.llvm.org/show_bug.cgi?id=42888">42888</a>
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<th>Summary</th>
<td>template parameter lookup differs from g++ wrt. constness
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>unspecified
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>dominik.strasser@onespin.com
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<pre>Created <span class=""><a href="attachment.cgi?id=22338" name="attach_22338" title="Source code illustrating the problem">attachment 22338</a> <a href="attachment.cgi?id=22338&action=edit" title="Source code illustrating the problem">[details]</a></span>
Source code illustrating the problem
For the attached source file, clang++ errors out with
main.C:18:4: error: invalid operands to binary expression ('AA' and 'S<E, EV>')
a << x;
~ ^ ~
main.C:10:14: note: candidate template ignored: substitution failure [with E =
E]: deduced non-type template argument does not have the same type as the
corresponding template parameter ('E *' vs 'const E *')
friend AA& operator<<( AA& os, const S<E,V>& e );
g++ handles the template fine.
Removing the constness of the second operator parameter or adding constness to
the variable makes the problem disappear.
In my application a different operatow was chosen leading to a misbehavior.</pre>
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