I understand that the lvalue-to-rvalue conversion was removed in London. I generally agree with this, but it means that ?: needs to be fixed:

Given:

    bool test;
    Integer a, b;
    test ? a : b;

    operator ?:(bool, const Integer &, const Integer &)
    operator ?:(bool, Integer, Integer)

(Not a problem in the C++11 FDIS, but misleading.)

Rationale: The description of the conditional operator in 7.6.16 [expr.cond] handles the lvalue case before the prototype is considered.