libstdc++-v3/testsuite/25_algorithms/unique_copy/check_type.cc

   1 // Copyright (C) 2005-2023 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 // 25.5.8 [lib.alg.unique_copy]
  19
  20 // { dg-do compile }
  21
  22 #include <algorithm>
  23 #include <testsuite_iterators.h>
  24
  25 using __gnu_test::input_iterator_wrapper;
  26 using __gnu_test::output_iterator_wrapper;
  27
  28 template<typename T>
  29 struct iter_facade
  30 {
  31   T& operator++();
  32   T operator++(int);
  33   T& operator*() const;
  34 };
  35
  36 struct S1 : iter_facade<S1> { };
  37
  38 struct S2 : iter_facade<S2>
  39 {
  40   S2(const S1&) {}
  41 };
  42
  43 bool
  44 operator==(const S1&, const S1&) {return true;}
  45
  46 struct X1 : iter_facade<X1>  { };
  47
  48 struct X2 : iter_facade<X2>
  49 {
  50   X2(const X1&) {}
  51 };
  52
  53 bool
  54 predicate(const X1&, const X1&) {return true;}
  55
  56 output_iterator_wrapper<S2>
  57 test1(input_iterator_wrapper<S1>& s1, output_iterator_wrapper<S2>& s2)
  58 { return std::unique_copy(s1, s1, s2); }
  59
  60 output_iterator_wrapper<X2>
  61 test2(input_iterator_wrapper<X1>& x1, output_iterator_wrapper<X2>& x2)
  62 { return std::unique_copy(x1, x1, x2, predicate); }