<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Error recovery loses type inheritance relationship?"
href="https://bugs.llvm.org/show_bug.cgi?id=33919">33919</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Error recovery loses type inheritance relationship?
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Frontend
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jmgao@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Minimized test case:
namespace ns {
typedef int type;
}
struct base {
};
struct derived : public base {
ns:;type foo() { return 0; }
};
int foo(base& b) {
return 0;
}
int main() {
derived x;
foo(x);
}
Clang (r4053586) is smart enough to notice that I probably meant ns::type:
test.cpp:9:3: error: unknown type name 'ns'
ns:;type foo() { return 0; }
^
test.cpp:9:6: error: expected expression
ns:;type foo() { return 0; }
^
test.cpp:9:7: error: unknown type name 'type'; did you mean 'ns::type'?
ns:;type foo() { return 0; }
^~~~
ns::type
test.cpp:2:15: note: 'ns::type' declared here
typedef int type;
^
but seems to have forgotten the relationship between base and derived?
test.cpp:18:3: error: no matching function for call to 'foo'
foo(x);
^~~
test.cpp:12:5: note: candidate function not viable: no known conversion
from 'derived' to 'base &' for 1st argument
int foo(base& b) {
The actual code that this was minimized from triggered a pretty catastrophic
failure, because the type in which this typo happened inherited a type which
had an overload for std::ostream operator <<, resulting in a helpful 111-line
list of every overload of std::ostream operator <<, per use of <<.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>