gcc/testsuite/g++.dg/lookup/operator-4.C

// PR c++/51577
// { dg-do compile { target c++17 } }
// Like operator-3.C but for unary fold expressions.

template <class... Ts> void f (Ts... xs) {
  (xs->*...); // { dg-error "no match" }
  (...->*xs); // { dg-error "no match" }
  (xs / ...); // { dg-error "no match" }
  (... / xs); // { dg-error "no match" }
  (xs * ...); // { dg-error "no match" }
  (... * xs); // { dg-error "no match" }
  (xs + ...); // { dg-error "no match" }
  (... + xs); // { dg-error "no match" }
  (xs - ...); // { dg-error "no match" }
  (... - xs); // { dg-error "no match" }
  (xs % ...); // { dg-error "no match" }
  (... % xs); // { dg-error "no match" }
  (xs & ...); // { dg-error "no match" }
  (... & xs); // { dg-error "no match" }
  (xs | ...); // { dg-error "no match" }
  (... | xs); // { dg-error "no match" }
  (xs ^ ...); // { dg-error "no match" }
  (... ^ xs); // { dg-error "no match" }
  (xs << ...); // { dg-error "no match" }
  (... << xs); // { dg-error "no match" }
  (xs >> ...); // { dg-error "no match" }
  (... >> xs); // { dg-error "no match" }
  (xs && ...); // { dg-error "no match" }
  (... && xs); // { dg-error "no match" }
  (xs || ...); // { dg-error "no match" }
  (... || xs); // { dg-error "no match" }
  (xs, ...);
  (..., xs);

  (xs == ...); // { dg-error "no match" }
  (... == xs); // { dg-error "no match" }
  (xs != ...); // { dg-error "no match" }
  (... != xs); // { dg-error "no match" }
  (xs < ...); // { dg-error "no match" }
  (... < xs); // { dg-error "no match" }
  (xs > ...); // { dg-error "no match" }
  (... > xs); // { dg-error "no match" }
  (xs <= ...); // { dg-error "no match" }
  (... <= xs); // { dg-error "no match" }
  (xs >= ...); // { dg-error "no match" }
  (... >= xs); // { dg-error "no match" }

  (xs += ...); // { dg-error "no match" }
  (... += xs); // { dg-error "no match" }
  (xs -= ...); // { dg-error "no match" }
  (... -= xs); // { dg-error "no match" }
  (xs *= ...); // { dg-error "no match" }
  (... *= xs); // { dg-error "no match" }
  (xs /= ...); // { dg-error "no match" }
  (... /= xs); // { dg-error "no match" }
  (xs %= ...); // { dg-error "no match" }
  (... %= xs); // { dg-error "no match" }
  (xs |= ...); // { dg-error "no match" }
  (... |= xs); // { dg-error "no match" }
  (xs ^= ...); // { dg-error "no match" }
  (... ^= xs); // { dg-error "no match" }
  (xs <<= ...); // { dg-error "no match" }
  (... <<= xs); // { dg-error "no match" }
  (xs >>= ...); // { dg-error "no match" }
  (... >>= xs); // { dg-error "no match" }
}

namespace N { struct A { }; }

#include "operator-3-ops.h"

int main() {
  f(N::A(), N::A());
}