libstdc++-v3/testsuite/25_algorithms/search/constrained.cc

   1 // Copyright (C) 2020-2025 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 { target c++20 } }
  19
  20 #include <algorithm>
  21 #include <testsuite_hooks.h>
  22 #include <testsuite_iterators.h>
  23
  24 using __gnu_test::test_container;
  25 using __gnu_test::test_range;
  26 using __gnu_test::input_iterator_wrapper;
  27 using __gnu_test::forward_iterator_wrapper;
  28
  29 namespace ranges = std::ranges;
  30
  31 struct X { int i; };
  32
  33 void
  34 test01()
  35 {
  36   X x[] = { {2}, {6}, {8}, {10}, {11} };
  37   X y[] = { {10}, {11} };
  38   {
  39
  40     test_container<X, forward_iterator_wrapper> c(x);
  41     auto res = ranges::search(c, y, {}, &X::i, &X::i);
  42     VERIFY( std::get<0>(res)->i == 10 && std::get<1>(res) == ranges::end(c) );
  43     res = ranges::search(c, c, {}, &X::i, &X::i);
  44     VERIFY( std::get<0>(res) == ranges::begin(c)
  45             && std::get<1>(res) == ranges::end(c) );
  46   }
  47
  48   {
  49     test_range<X, forward_iterator_wrapper> r(x);
  50     auto res = ranges::search(r, y, {}, &X::i, &X::i);
  51     VERIFY( std::get<0>(res)->i == 10 && std::get<1>(res) == ranges::end(r) );
  52     res = ranges::search(r, r, {}, &X::i, &X::i);
  53     VERIFY( std::get<0>(res) == ranges::begin(r)
  54             && std::get<1>(res) == ranges::end(r) );
  55   }
  56 }
  57
  58 void
  59 test02()
  60 {
  61   static constexpr X x[] = { {2}, {2}, {6}, {8}, {10}, {11} };
  62   static constexpr X y[] = { {6}, {8} };
  63   static constexpr int z[] = { 2, 8 };
  64   static constexpr int w[] = { 2 };
  65
  66   static_assert(std::get<0>(ranges::search(x, y, {}, &X::i, &X::i)) == x+2);
  67   static_assert(std::get<1>(ranges::search(x, y, {}, &X::i, &X::i)) == x+4);
  68
  69   static_assert(std::get<0>(ranges::search(x, z, {}, &X::i)) == x+6);
  70   static_assert(std::get<1>(ranges::search(x, z, {}, &X::i)) == x+6);
  71
  72   static_assert(std::get<0>(ranges::search(x, w, {}, &X::i)) == x+0);
  73   static_assert(std::get<1>(ranges::search(x, w, {}, &X::i)) == x+1);
  74
  75   static_assert(std::get<0>(ranges::search(x, x+6, w, w, {}, &X::i)) == x+0);
  76   static_assert(std::get<1>(ranges::search(x, x+6, w, w, {}, &X::i)) == x+0);
  77
  78   static_assert(std::get<0>(ranges::search(x, x, w, w+1, {}, &X::i)) == x+0);
  79   static_assert(std::get<1>(ranges::search(x, x, w, w+1, {}, &X::i)) == x+0);
  80 }
  81
  82 int
  83 main()
  84 {
  85   test01();
  86   test02();
  87 }