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1.0 KiB
[range.prim.ssize]
25 Ranges library [ranges]
25.3 Range access [range.access]
25.3.11 ranges::ssize [range.prim.ssize]
The name ranges::ssize denotes a customization point object ([customization.point.object]).
Given a subexpression E with type T, let t be an lvalue that denotes the reified object for E.
If ranges::size(t) is ill-formed,ranges::ssize(E) is ill-formed.
Otherwise let D bemake-signed-like-t<decltype(ranges::size(t))>, orptrdiff_t if it is wider than that type;ranges::ssize(E) is expression-equivalent tostatic_cast(ranges::size(t)).