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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [ms] enums are always ints but should not appear to have a fixed underlying type"
href="https://llvm.org/bugs/show_bug.cgi?id=27098">27098</a>
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<th>Summary</th>
<td>[ms] enums are always ints but should not appear to have a fixed underlying type
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
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<th>Reporter</th>
<td>rnk@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>david.majnemer@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Consider:
$ cat t.cpp
enum A {};
void f() { A{0}; }
$ clang -cc1 t.cpp -std=c++1z -triple x86_64-linux
t.cpp:2:18: error: cannot initialize a value of type 'A' with an rvalue of type
'int'
A f() { return A{0}; }
^
1 error generated.
$ clang -cc1 t.cpp -std=c++1z -triple x86_64-windows-msvc
# no output
We always give MS enums the underlying type 'int'. In the AST,
EnumDecl::isFixed returns true, even when the user did not write ': int'. We
should arrange to make that return false while still using an 'int'
representation by default.</pre>
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</p>
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