On 23/11/15 23:01, Jason Merrill wrote: > There's a proposal working through the C++ committee to define the order > of evaluation of subexpressions that previously had unspecified ordering: > > http://www.open-std.org/Jtc1/sc22/wg21/docs/papers/2015/p0145r0.pdf > > I agree with much of this, but was concerned about the proposal to > define order of evaluation of function arguments as left-to-right, since > GCC does right-to-left on PUSH_ARGS_REVERSED targets, including x86_64. > > Any thoughts?
Not about PUSH_ARGS_REVERSED targets, but my two-penn'orth: The proposal seems to be a bit of a minefield. This one: a(b, c, d) is a bit counter-intuitive. I wouldn't expect a to be evaluated before the arg list. I wonder how many C++ programmers would. In addition, I don't see anything about C compatibility here. It would be very confusing, to say the least, if this were to be defined in C++ but not C. Andrew.
