https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97512
Bug ID: 97512
Summary: Move std::ranges::subrange structured bindings stuff
from <ranges> to <ranges_util.h>
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: hewillk at gmail dot com
Target Milestone: ---
In commit 160061a: libstdc++: Introduce new headers for C++20 ranges
components, structured bindings stuff of std::ranges::subrange is move into
<ranges> header itself, this will make following code failed in gcc-trunk
(https://godbolt.org/z/az5bfc):
#include <vector>
#include <algorithm>
int main() {
std::vector v{1, 1, 2};
auto [first, last] = std::ranges::unique(v);
}
error: cannot decompose inaccessible member 'std::ranges::subrange
Put structured bindings stuff together with subrange's definition should be
convenient for users, since std::ranges::remove/unique return a subrange, for a
user like me usually want to structurally bind it without extra including
<ranges>, or it would make sense to have these tuple-related specializations
close to the get functions, which are already in the <bits/ranges_util.h>
header.
