libstdc++-v3/testsuite/20_util/uses_allocator/69293_neg.cc

   1 // Copyright (C) 2016-2019 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do compile { target c++11 } }
  19
  20 // PR libstdc++/69293
  21
  22 #include <tuple>
  23 #include <memory>
  24
  25 using std::allocator;
  26 using std::allocator_arg_t;
  27 using std::uses_allocator;
  28 using std::tuple;
  29 using std::is_constructible;
  30
  31 struct X
  32 {
  33   using allocator_type = allocator<int>;
  34 };
  35
  36 using alloc_type = X::allocator_type;
  37
  38 static_assert(uses_allocator<X, alloc_type>{}, "");
  39 static_assert(!is_constructible<X, allocator_arg_t, alloc_type>{}, "");
  40 static_assert(!is_constructible<X, alloc_type>{}, "");
  41
  42 void
  43 test01()
  44 {
  45   alloc_type a;
  46   std::tuple<X> t(std::allocator_arg, a); // this is required to be ill-formed
  47   // { dg-error "static assertion failed" "" { target *-*-* } 96 }
  48 }