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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Bogus message regarding use of "this" in friend declaration"
href="http://llvm.org/bugs/show_bug.cgi?id=18475">18475</a>
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<th>Summary</th>
<td>Bogus message regarding use of "this" in friend declaration
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++11
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>hstong@ca.ibm.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>The use of "this" in trailing-return-types and exception-specifications does
not work in friend declarations in Clang.
## SMALL SOURCE:
struct Other {
int p();
auto q() -> decltype(p()) *;
};
class Friendly {
// according to 5.1.1 [expr.prim.general] paragraph 3 the expression "this"
// below is a prvalue of type "pointer to Other".
friend auto Other::q() -> decltype(this->p()) *;
// GCC and ICC accepts, Clang rejects
};
## COMPILER INVOCATION:
clang++ -std=c++11 friendThis.cc
## ACTUAL OUTPUT:
friendThis.cc:9:39: error: invalid use of 'this' outside of a non-static member
function
friend auto Other::q() -> decltype(this->p()) *;
^
1 error generated.
## EXPECTED OUTPUT:
Clean compile.
## clang++ -v:
clang version 3.5
Target: powerpc64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/ppc64-redhat-linux/3.4.6
Found candidate GCC installation: /usr/lib/gcc/ppc64-redhat-linux/4.4.6
Selected GCC installation: /usr/lib/gcc/ppc64-redhat-linux/4.4.6</pre>
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