c++ - Bit-fields "In-class initialization" results in "error: lvalue required as left operand of assignment"

Question

struct bitfield {
  int i = 0;  // ok
  int j : 8 = 0;  // error: lvalue required as left operand of assignment
};

What is the correct syntax to initialize bit-fields using C++11 "in-class initialization" feature?

Answer 1

This was raised as Core Issue 1341 to the C++ standard, but was rejected by the C++ Core Working Group in October 2015 as NAD ("not a defect") - see http://open-std.org/JTC1/SC22/WG21/docs/cwg_closed.html#1341