libstdc++-v3/testsuite/std/ranges/safe_range.cc

   1 // Copyright (C) 2019-2020 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 <ranges>
  22 #include <testsuite_iterators.h>
  23
  24 static_assert( std::ranges::safe_range<int(&)[1]> );
  25 static_assert( std::ranges::safe_range<const int(&)[1]> );
  26 static_assert( !std::ranges::safe_range<int[1]> );
  27 static_assert( !std::ranges::safe_range<int*> );
  28
  29 using __gnu_test::test_contiguous_range;
  30
  31 static_assert( !std::ranges::safe_range<test_contiguous_range<int>> );
  32 static_assert( std::ranges::safe_range<test_contiguous_range<int>&> );
  33 static_assert( !std::ranges::safe_range<test_contiguous_range<int>&&> );
  34
  35 template<>
  36 constexpr bool
  37   std::ranges::enable_safe_range<test_contiguous_range<long>> = true;
  38
  39 static_assert( std::ranges::safe_range<test_contiguous_range<long>> );
  40 static_assert( std::ranges::safe_range<test_contiguous_range<long>&> );
  41 static_assert( std::ranges::safe_range<test_contiguous_range<long>&&> );