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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Missed diagnostic in narrowing conversion from unscoped enum to floating"
href="https://llvm.org/bugs/show_bug.cgi?id=24771">24771</a>
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<th>Summary</th>
<td>Missed diagnostic in narrowing conversion from unscoped enum to floating
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<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>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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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>andrey.vul@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>A narrowing conversion from an unscoped enumeration to a floating-point type
fails to emit a -Wc++11-narrowing diagnostic.
If we try the same, -Wc++11-narrowing works as expected.
### SOURCE:
$ cat narrowing.cc
int x0 = 5;
double y0 = { x0 }; // (1)
enum { z1 = 5 } x1 = z1;
double y1 = { x1 }; // (2)
### COMPILER INVOCATION AND OUTPUT:
$ clang++ -std=c++11 -c -Werror=c++11-narrowing narrowing.cc
narrowing.cc:2:15: error: non-constant-expression cannot be narrowed from type
'int' to 'double' in initializer list [-Wc++11-narrowing]
double y0 = { x0 };
^~
### EXPECTED OUTPUT:
narrowing.cc:2:15: error: non-constant-expression cannot be narrowed from type
'int' to 'double' in initializer list [-Wc++11-narrowing]
double y0 = { x0 };
^~
narrowing.cc:4:15: error: non-constant-expression cannot be narrowed from type
'<anonymous enum>' to 'double' in initializer list [-Wc++11-narrowing]
double y1 = { x1 };
^~
NOTE: the second diagnostic was synthesized from gcc -Werror=narrowing
### COMPILER VERSION INFO:
clang version 3.8.0 (trunk 246556)
Target: powerpc64le-unknown-linux-gnu
Thread model: posix
Found candidate GCC installation: /usr/lib/gcc/powerpc64le-linux-gnu/4.8
Found candidate GCC installation: /usr/lib/gcc/powerpc64le-linux-gnu/4.8.2
Found candidate GCC installation: /usr/lib/gcc/powerpc64le-linux-gnu/4.9
Found candidate GCC installation: /usr/lib/gcc/powerpc64le-linux-gnu/4.9.1
Selected GCC installation: /usr/lib/gcc/powerpc64le-linux-gnu/4.8
Candidate multilib: .;@m64
Selected multilib: .;@m64</pre>
</div>
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