libstdc++-v3/testsuite/23_containers/vector/cons/89164_c++17.cc

   1 // Copyright (C) 2019-2020 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-options "-std=gnu++17" }
  19 // { dg-do compile { target c++17 } }
  20
  21 #include <vector>
  22
  23 // PR libstdc++/89164
  24
  25 struct X
  26 {
  27   X() = default;
  28   X(const X&) = delete;
  29 };
  30
  31 void test01()
  32 {
  33   X x[1];
  34   // Should not be able to create vector using uninitialized_copy:
  35   std::vector<X> v1{x, x+1};    // { dg-error "here" }
  36
  37   // Should not be able to create vector using uninitialized_fill_n:
  38   std::vector<X> v2{2u, X{}};   // { dg-error "here" }
  39 }
  40
  41 void test02()
  42 {
  43 #if __cplusplus >= 201703L
  44   // Can create initializer_list<X> with C++17 guaranteed copy elision,
  45   // but shouldn't be able to copy from it with uninitialized_copy:
  46   std::vector<X> v3{X{}, X{}, X{}};   // { dg-error "here" }
  47 #endif
  48 }
  49 // { dg-error "constructible from value" "" { target *-*-* } 0 }
  50 // { dg-error "constructible from input" "" { target *-*-* } 0 }