libstdc++-v3/testsuite/24_iterators/input/concept.cc

   1 // Copyright (C) 2019-2024 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 compile { target c++20 } }
  19
  20 #include <iterator>
  21
  22 using std::input_iterator;
  23
  24 static_assert( input_iterator< int*         > );
  25 static_assert( input_iterator< const int* > );
  26 static_assert( input_iterator< void**       > );
  27
  28 static_assert( ! input_iterator< int* const     > );
  29 static_assert( ! input_iterator< const int* const       > );
  30 static_assert( ! input_iterator< void** const   > );
  31
  32 static_assert( ! input_iterator< void*    > );
  33 static_assert( ! input_iterator< const void*      > );
  34 static_assert( ! input_iterator< volatile void* > );
  35
  36 static_assert( ! input_iterator< void(*)() > );
  37 static_assert( ! input_iterator< void(&)() > );
  38
  39 struct A;
  40 static_assert( ! input_iterator< void(A::*)() > );
  41 static_assert( ! input_iterator< int A::*       > );
  42
  43 #include <array>
  44 #include <deque>
  45 #include <forward_list>
  46 #include <list>
  47 #include <string>
  48 #include <string_view>
  49 #include <vector>
  50
  51 using std::array;
  52 using std::deque;
  53 using std::forward_list;
  54 using std::list;
  55 using std::string;
  56 using std::string_view;
  57 using std::vector;
  58
  59 struct B { };
  60
  61 static_assert( input_iterator< array<int, 1>::iterator      > );
  62 static_assert( input_iterator< array<B, 1>::const_iterator  > );
  63
  64 static_assert( input_iterator< deque<int>::iterator     > );
  65 static_assert( input_iterator< deque<B>::const_iterator > );
  66
  67 static_assert( input_iterator< forward_list<int>::iterator      > );
  68 static_assert( input_iterator< forward_list<B>::const_iterator  > );
  69
  70 static_assert( input_iterator< list<int>::iterator      > );
  71 static_assert( input_iterator< list<B>::const_iterator  > );
  72
  73 static_assert( input_iterator< string::iterator       > );
  74 static_assert( input_iterator< string::const_iterator > );
  75
  76 static_assert( input_iterator< string_view::iterator        > );
  77 static_assert( input_iterator< string_view::const_iterator  > );
  78
  79 static_assert( input_iterator< vector<int>::iterator      > );
  80 static_assert( input_iterator< vector<B>::const_iterator  > );
  81
  82 #include <streambuf>
  83
  84 using std::istreambuf_iterator;
  85 using std::ostreambuf_iterator;
  86
  87 static_assert( input_iterator< istreambuf_iterator<char>    > );
  88 static_assert( ! input_iterator< ostreambuf_iterator<char>  > );