libstdc++-v3/testsuite/25_algorithms/fill_n/dr426.cc

   1 // Copyright (C) 2019-2022 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 run }
  19
  20 #include <algorithm>
  21 #include <testsuite_hooks.h>
  22
  23 // DR 426. search_n(), fill_n(), and generate_n() with negative n
  24
  25 void
  26 test01()
  27 {
  28   int i = 99;
  29   std::fill_n(&i, 0, 13);
  30   VERIFY( i == 99 );
  31   std::fill_n(&i, -1, 13);
  32   VERIFY( i == 99 );
  33   std::fill_n(&i, -100, 13);
  34   VERIFY( i == 99 );
  35 }
  36
  37 struct X
  38 {
  39   X() { }
  40   X(const X&) { throw 1; }
  41   X& operator=(const X&) { throw 1u; }
  42 };
  43
  44 void
  45 test02()
  46 {
  47   X x;
  48   std::fill_n(&x, 0, x);
  49   std::fill_n(&x, -1, x);
  50   std::fill_n(&x, -100, x);
  51 }
  52
  53 int
  54 main()
  55 {
  56   test01();
  57   test02();
  58 }