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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 WONTFIX - bitset::const_reference is an extension"
href="https://llvm.org/bugs/show_bug.cgi?id=24435">bug 24435</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<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>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>WONTFIX
</td>
</tr></table>
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<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - bitset::const_reference is an extension"
href="https://llvm.org/bugs/show_bug.cgi?id=24435#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - bitset::const_reference is an extension"
href="https://llvm.org/bugs/show_bug.cgi?id=24435">bug 24435</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>Yes, it is an extension.
The purpose is to increase consistency among the containers.
Consider the following code (from Howard):
#include <vector>
#include <bitset>
#include <cassert>
template <class Container>
void
test(Container& c, Container const& cc)
{
using const_ref = typename Container::const_reference;
assert(&c == &cc);
const_ref cr = cc[0];
assert(cr == c[0]);
c[0] = 1;
assert(cr == c[0]);
}
int
main()
{
std::vector<char> vc{1};
test(vc, vc);
std::bitset<1> bs;
test(bs, bs);
std::vector<bool> vb{1};
test(vb, vb);
}
This compiles and runs w/o error in libc++.</pre>
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