libstdc++-v3/testsuite/25_algorithms/lexicographical_compare/debug/irreflexive_neg.cc

   1 // Copyright (C) 2015 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++11" }
  19 // { dg-require-debug-mode "" }
  20 // { dg-do run { xfail *-*-* } }
  21
  22 #include <algorithm>
  23 #include <testsuite_hooks.h>
  24
  25 struct A
  26 {
  27   A(int i) : _i(i)
  28   { }
  29
  30   int _i;
  31 };
  32
  33 bool
  34 operator<(A a, int i)
  35 { return a._i < i; }
  36
  37 bool
  38 operator<(int i, A a)
  39 { return i < a._i; }
  40
  41 void test01()
  42 {
  43   bool test __attribute__((unused)) = true;
  44
  45   A as[] { 0, 1, 2, 3 };
  46   int is[] { 0, 1, 2, 3 };
  47   VERIFY( !std::lexicographical_compare(as, as + 4, is, is + 4) );
  48 }
  49
  50 bool
  51 bad_lower(int lhs, int rhs)
  52 {
  53   if (lhs == 0)
  54     return true;
  55
  56   return lhs < rhs;
  57 }
  58
  59 void test02()
  60 {
  61   int is[] { 0, 1, 2, 3 };
  62   std::lexicographical_compare(is, is + 4, is, is + 4, bad_lower);
  63 }
  64
  65 int main()
  66 {
  67   test01();
  68   test02();
  69   return 0;
  70 }