[Bug libstdc++/102270] New: std::tuple<>::swap missing constexpr specifier

[hewillk at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102270

            Bug ID: 102270
           Summary: std::tuple<>::swap missing constexpr specifier
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hewillk at gmail dot com
  Target Milestone: ---

#include <tuple>

constexpr bool b = [] {
  std::tuple<> x, y;
  x.swap(y);
  return true;
}();

https://godbolt.org/z/Gac17hjen