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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Requesting an additional diagnostic note on invalid casts"
href="https://llvm.org/bugs/show_bug.cgi?id=26722">26722</a>
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<th>Summary</th>
<td>Requesting an additional diagnostic note on invalid casts
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</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>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>Yunzhong_Gao@playstation.sony.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>I have the following two test cases.
//------ test1.cc
class base {
virtual void func() { }
};
class Derived;
void test(Derived *x) {
base *y = x; // error here about invalid cast
}
//------ end test1.cc
//------ test2.cc
class base {
virtual void func() { }
};
class Derived { };
void test(Derived *x) {
base *y = x; // error here about invalid cast
}
//------ end test2.cc
When I compile with clang, I get the same error for both test cases:
error: cannot initialize a variable of type 'base *' with an lvalue of type
'Derived *'
This is a feature request for an additional note that differentiates the
two test cases. For example, maybe
for the first test case,
note: class type 'Derived' is incomplete
And for the second test case,
note: class type 'Derived' is not inheriting from class type 'base'
If I try the same test case on the online compiler at ideone.com, I would
get the note as I described for the first test case.</pre>
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