libstdc++-v3/testsuite/24_iterators/output/concept.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-options "-std=gnu++2a" }
  19 // { dg-do compile { target c++2a } }
  20
  21 #include <iterator>
  22
  23 using std::output_iterator;
  24
  25 static_assert( output_iterator< int*, int > );
  26 static_assert( output_iterator< int*, const int > );
  27 static_assert( output_iterator< int*, long > );
  28 static_assert( output_iterator< void**, void* > );
  29 static_assert( output_iterator< void**, long* > );
  30 static_assert( ! output_iterator< const int*, int > );
  31
  32 static_assert( ! output_iterator< int* const, int > );
  33 static_assert( ! output_iterator< const int* const, int > );
  34 static_assert( ! output_iterator< void** const, void* > );
  35
  36 static_assert( ! output_iterator< void*, void > );
  37 static_assert( ! output_iterator< const void*, void > );
  38 static_assert( ! output_iterator< const void*, void* > );
  39 static_assert( ! output_iterator< volatile void*, void > );
  40 static_assert( ! output_iterator< volatile void*, void* > );
  41
  42 static_assert( ! output_iterator< void(*)(), void(&)() > );
  43 static_assert( ! output_iterator< void(&)(), void(&)() > );
  44 static_assert( output_iterator< void(**)(), void(*)() > );
  45 static_assert( output_iterator< void(**)(), void(&)() > );
  46
  47 struct A;
  48 static_assert( ! output_iterator< void(A::*)(), A* > );
  49 static_assert( ! output_iterator< void(A::*)(), void(A::*)() > );
  50 static_assert( ! output_iterator< int A::*, int > );
  51 static_assert( ! output_iterator< int A::*, int A::* > );
  52
  53 #include <array>
  54 #include <deque>
  55 #include <forward_list>
  56 #include <list>
  57 #include <set>
  58 #include <string>
  59 #include <string_view>
  60 #include <vector>
  61
  62 using std::array;
  63 using std::deque;
  64 using std::forward_list;
  65 using std::list;
  66 using std::set;
  67 using std::string;
  68 using std::string_view;
  69 using std::vector;
  70
  71 struct B { bool operator<(const B&) const; };
  72
  73 static_assert( output_iterator< array<int, 1>::iterator, int > );
  74 static_assert( output_iterator< array<B, 1>::iterator, B > );
  75 static_assert( ! output_iterator< array<int, 1>::const_iterator, int > );
  76 static_assert( ! output_iterator< array<B, 1>::const_iterator, B > );
  77
  78 static_assert( output_iterator< deque<int>::iterator, int > );
  79 static_assert( output_iterator< deque<B>::iterator, B > );
  80 static_assert( ! output_iterator< deque<int>::const_iterator, int > );
  81 static_assert( ! output_iterator< deque<B>::const_iterator, B > );
  82
  83 static_assert( output_iterator< forward_list<int>::iterator, int > );
  84 static_assert( output_iterator< forward_list<B>::iterator, B > );
  85 static_assert( ! output_iterator< forward_list<int>::const_iterator, int > );
  86 static_assert( ! output_iterator< forward_list<B>::const_iterator, B > );
  87
  88 static_assert( output_iterator< list<int>::iterator, int > );
  89 static_assert( output_iterator< list<B>::iterator, B > );
  90 static_assert( ! output_iterator< list<int>::const_iterator, int > );
  91 static_assert( ! output_iterator< list<B>::const_iterator, B > );
  92
  93 static_assert( ! output_iterator< set<int>::iterator, int > );
  94 static_assert( ! output_iterator< set<B>::iterator, B > );
  95 static_assert( ! output_iterator< set<int>::const_iterator, int > );
  96 static_assert( ! output_iterator< set<B>::const_iterator, B > );
  97
  98 static_assert( output_iterator< string::iterator, char > );
  99 static_assert( output_iterator< string::iterator, int > );
 100 static_assert( ! output_iterator< string::const_iterator, char > );
 101 static_assert( ! output_iterator< string::const_iterator, int > );
 102
 103 static_assert( ! output_iterator< string_view::iterator, char > );
 104 static_assert( ! output_iterator< string_view::iterator, int > );
 105 static_assert( ! output_iterator< string_view::const_iterator, char > );
 106 static_assert( ! output_iterator< string_view::const_iterator, int > );
 107
 108 static_assert( output_iterator< vector<int>::iterator, int > );
 109 static_assert( output_iterator< vector<B>::iterator, B > );
 110 static_assert( ! output_iterator< vector<int>::const_iterator, int > );
 111 static_assert( ! output_iterator< vector<B>::const_iterator, B > );
 112
 113 #include <streambuf>
 114
 115 using std::istreambuf_iterator;
 116 using std::ostreambuf_iterator;
 117
 118 static_assert( ! output_iterator< istreambuf_iterator<char>, char > );
 119 static_assert( ! output_iterator< istreambuf_iterator<char>, int > );
 120 static_assert( output_iterator< ostreambuf_iterator<char>, char > );
 121 static_assert( output_iterator< ostreambuf_iterator<char>, int > );