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<body><span class="vcard"><a class="email" href="mailto:mclow.lists@gmail.com" title="Marshall Clow (home) <mclow.lists@gmail.com>"> <span class="fn">Marshall Clow (home)</span></a>
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<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Compilation failure when using libc++"
href="https://llvm.org/bugs/show_bug.cgi?id=22935">bug 22935</a>
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<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>INVALID
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Compilation failure when using libc++"
href="https://llvm.org/bugs/show_bug.cgi?id=22935#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - Compilation failure when using libc++"
href="https://llvm.org/bugs/show_bug.cgi?id=22935">bug 22935</a>
from <span class="vcard"><a class="email" href="mailto:mclow.lists@gmail.com" title="Marshall Clow (home) <mclow.lists@gmail.com>"> <span class="fn">Marshall Clow (home)</span></a>
</span></b>
<pre>Simpler reproducer:
#include <string>
#include <vector>
template <typename T> struct fooboo { enum { value = false };};
template<> struct fooboo<std::vector<char>::iterator> { enum { value = true };
};
template<> struct fooboo<std::string ::iterator> { enum { value = true };
};
int main() { return 0; }
It turns out that "std::vector<char>::iterator" and "std::string::iterator" are
the same type, and thus you get a multiple definition error.
This is unfortunate, but allowed by the standard. In fact, both could be simply
"char *". (they aren't in libc++, but they could be)</pre>
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