This is the mail archive of the
mailing list for the GCC project.
Re: Value type of map need not be default copyable
On Sat, 4 Aug 2012, Paolo Carlini wrote:
.. note anyway, that only the new testcase was failing, no regressions on pre
What I am seeing is a different testcase (with the same name but in a
different directory) failing, because:
typedef std::pair<const rvalstruct,rvalstruct> V;
static_assert(std::is_constructible<V, V&&>::value,"too bad");
and it makes sense, since you end up having to construct a rvalstruct from
a rvalstruct const&&.
make_pair constructs a pair without const, from which a pair with const is
constructible, though I am surprised it doesn't fail somewhere further. I
don't know what the right solution is, maybe something emplace-like. In
any case, make_pair is unlikely to be right.