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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - i/o stream of based enum gives ambiguity error"
href="https://llvm.org/bugs/show_bug.cgi?id=26431">26431</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>i/o stream of based enum gives ambiguity error
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<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>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ivan@millcomputing.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>This source:
#include <iostream>
enum foo : short {};
extern foo bar;
int main(int argc, char** argv) {
std::cerr << bar;
return 0;
}
when compiled with:
s8:~/mill/specializer$ clang -std=c++11 -v
clang version 3.7.0 (branches/release_37 242873)
Target: x86_64-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/x86_64-redhat-linux/4.9.2
Selected GCC installation: /usr/lib/gcc/x86_64-redhat-linux/4.9.2
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64
gives this diagnostic:
test.cc:6:12: error: use of overloaded operator '<<' is ambiguous (with operand
types 'ostream' (aka 'basic_ostream<char>') and 'foo')
std::cerr << bar;
~~~~~~~~~ ^ ~~~
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:178:7:
note:
candidate function
operator<<(short __n);
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:189:7:
note:
candidate function
operator<<(int __n);
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:166:7:
note:
candidate function
operator<<(long __n)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:170:7:
note:
candidate function
operator<<(unsigned long __n)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:174:7:
note:
candidate function
operator<<(bool __n)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:181:7:
note:
candidate function
operator<<(unsigned short __n)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:192:7:
note:
candidate function
operator<<(unsigned int __n)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:201:7:
note:
candidate function
operator<<(long long __n)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:205:7:
note:
candidate function
operator<<(unsigned long long __n)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:220:7:
note:
candidate function
operator<<(double __f)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:224:7:
note:
candidate function
operator<<(float __f)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:232:7:
note:
candidate function
operator<<(long double __f)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:482:5:
note:
candidate function [with _Traits = std::char_traits<char>]
operator<<(basic_ostream<char, _Traits>& __out, char __c)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:476:5:
note:
candidate function [with _CharT = char, _Traits = std::char_traits<char>]
operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:488:5:
note:
candidate function [with _Traits = std::char_traits<char>]
operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
^
/usr/lib/gcc/x86_64-redhat-linux/4.9.2/../../../../include/c++/4.9.2/ostream:493:5:
note:
candidate function [with _Traits = std::char_traits<char>]
operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
^
1 error generated.</pre>
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