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<base href="http://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - MSVC compatibility hack thwarted by typo correction"
href="http://llvm.org/bugs/show_bug.cgi?id=20249">20249</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>MSVC compatibility hack thwarted by typo correction
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Windows NT
</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>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rnk@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu, richard-llvm@metafoo.co.uk, rikka@google.com
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Introducing typo correction candidates causes a warning with -fms-compatibility
to become an error.
consider:
$ cat t.cpp
#ifdef BUG
namespace type_in_base_of_dependent_base {
struct A { typedef int NameFromBase; };
}
#endif
namespace function_template_deduction {
// Overloaded function templates.
template <int N> int f() { return N; }
template <typename T> int f() { return sizeof(T); }
// Dependent base class with enum.
template <typename T> struct A { enum { NameFromBase = 4 }; };
template <typename T> struct D : A<T> {
// expected-warning@+1 {{use of undeclared identifier 'NameFromBase';
unqualified lookup into dependent bases}}
int x = f<NameFromBase>();
};
}
$ clang -c t.cpp
t.cpp:16:13: warning: use of undeclared identifier 'NameFromBase'; unqualified
lookup into dependent bases of class template 'D' is a Microsoft extension
[-Wmicrosoft]
int x = f<NameFromBase>();
^
this->
1 warning generated.
$ clang -c t.cpp -DBUG
t.cpp:16:13: error: unknown type name 'NameFromBase'; did you mean
'type_in_base_of_dependent_base::A::NameFromBase'?
int x = f<NameFromBase>();
^~~~~~~~~~~~
type_in_base_of_dependent_base::A::NameFromBase
t.cpp:3:24: note: 'type_in_base_of_dependent_base::A::NameFromBase' declared
here
struct A { typedef int NameFromBase; };
^
1 error generated.</pre>
</div>
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