Why do lvalue reference and rvalue reference collapse in lvalue reference?

Asked Jun 16 '19 at 18:15

Active Jun 16 '19 at 18:35

Viewed 56 times

Let's consider this code:

int i=0;

using U = int&;
U&& x = i;

using V = int&&;
V& y = i;

Could you please explain the motivation for these two reference collapsing rules?

edited Jun 16 '19 at 18:35

asked Jun 16 '19 at 18:15

beginpluses

What other behaviour does make sense to you? – n. m. could be an AI Jun 16 '19 at 18:21
@n.m. I'm not sure what a combination of both kinds of refetence could mean at all... – beginpluses Jun 16 '19 at 18:34
Things that have no meaning normally result in compilation errors. Do you think a compilation error would be appropriate here? – n. m. could be an AI Jun 16 '19 at 18:40
@n.m. I need a better understanding this before deciding what is appropriate – beginpluses Jun 16 '19 at 18:58

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