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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Clang fails to compile valid template for x86_64-pc-windows-msvc target"
href="https://bugs.llvm.org/show_bug.cgi?id=52420">52420</a>
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<th>Summary</th>
<td>Clang fails to compile valid template for x86_64-pc-windows-msvc target
</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>All
</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>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>epastor@google.com
</td>
</tr>
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Originally reported by Anthony Erlinger:
The following valid code fails to compile with -target x86_64-pc-windows-msvc:
template <typename A>
struct S {
void f() {
const int B = 5;
struct C {
int g() {
return B; // <-- error: use of undeclared identifier 'B'
}
};
}
};
void test() {
S<int>().f();
}
Invocation: clang -target x86_64-pc-windows-msvc example.cc
Compiler output:
<source>:7:24: error: use of undeclared identifier 'B'
return B;
^
<source>:14:14: note: in instantiation of member function 'S<int>::f' requested
here
S<int>().f();
1 error generated.
Compiler returned: 1
Godbolt example showing failure in clang vs successful compile in MSVC:
<a href="https://godbolt.org/z/h6431Wbh5">https://godbolt.org/z/h6431Wbh5</a>
This is fixed with the flags /Zc:twoPhase or -fno-delayed-template-parsing, but
works in MSVC itself, so it's clearly a bug in how we emulate MSVC's
non-compliant template instantiation.</pre>
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