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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - wordsmith viable conversion error message for function return type"
href="http://llvm.org/bugs/show_bug.cgi?id=21803">21803</a>
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<th>Summary</th>
<td>wordsmith viable conversion error message for function return type
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<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++
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nlewycky@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Testcase:
template<typename A, typename B = int> class X {};
X<float> f() {
return X<float, double>();
}
$ clang b13910958.cc -fsyntax-only
b13910958.cc:4:10: error: no viable conversion from 'X<[...], double>' to
'X<[...], (default) int>'
return X<float, double>();
^~~~~~~~~~~~~~~~~~
b13910958.cc:1:46: note: candidate constructor (the implicit copy constructor)
not viable: no known conversion from 'X<float, double>' to
'const X<float, int> &' for 1st argument
template<typename A, typename B = int> class X {};
^
1 error generated.
Better would be "error: no viable conversion from returned value of type
'X<[...], double>' to function return type 'X<[...], (default) int>'"</pre>
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