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<base href="https://bugs.llvm.org/">
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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 - Enum class variables can't be used as function arguments"
href="https://bugs.llvm.org/show_bug.cgi?id=39459">39459</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Enum class variables can't be used as function arguments
</td>
</tr>
<tr>
<th>Product</th>
<td>lldb
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>lldb-dev@lists.llvm.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>clayborg@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Compile the following code
enum class Foo : short {
a,b,c
};
bool UseFoo(Foo f) {
return (bool)f;
}
int main() {
Foo foo = Foo::a;
auto r = UseFoo(foo); // breakpoint
}
Then debug it and try to call "UseFoo" with an enumeration:
$ lldb a.out
(lldb) target create "a.out"
(lldb) b /breakpoint/
(lldb) r
Process 98692 launched: '/tmp/a.out' (x86_64)
Process 98692 stopped
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
frame #0: 0x0000000100000f9e a.out`main at /tmp/main.cpp:11
8
9 int main() {
10 Foo foo = Foo::a;
-> 11 auto r = UseFoo(foo); // breakpoint
12 }
13
Target 0: (a.out) stopped.
(lldb) p UseFoo(Foo::b)
error: no matching function for call to 'UseFoo'
candidate function not viable: no known conversion from 'short' to 'Foo' for
1st argument
(lldb) p UseFoo((Foo)Foo::b)
(bool) $0 = true</pre>
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