This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 117a. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
2025-04-13
1295. Binding a reference to an rvalue bit-fieldSection: 9.5.4 [dcl.init.ref] Status: CD3 Submitter: Nikolay Ivchenkov Date: 2011-04-14[Voted into the WP at the February, 2012 meeting; moved to DR at the October, 2012 meeting.]
Consider the following example:
struct X {
unsigned bitfield : 4;
};
int main() {
X x = { 1 };
unsigned const &ref = static_cast<X &&>(x).bitfield;
}
According to 9.5.4 [dcl.init.ref] paragraph 5, ref is bound to the bit-field xvalue.
Proposed resolution (August, 2011):
Change the indicated sub-bullet of 9.5.4 [dcl.init.ref] paragraph 5 as follows:
is an xvalue (but is not a bit-field), class prvalue, array prvalue or function lvalue and “cv1 T1” is reference-compatible with “cv2 T2”, or
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