libstdc++-v3/testsuite/21_strings/basic_string_view/requirements/traits_neg.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++17" }
  19 // { dg-do compile { target c++17 } }
  20
  21 #include <string_view>
  22
  23 // C++98 21.1 [lib.char.traits] p3
  24 // C++03 21.1 [lib.char.traits] p3
  25 // C++11 21.2 [char.traits] p3
  26 // C++14 21.2 [char.traits] p3
  27 // C++17 24.2 [char.traits] p3
  28 // "Traits::char_type shall be the same as CharT."
  29 // C++17 24.4.2 [string.view.template] p1
  30 // "the type traits::char_type shall name the same type as charT"
  31 // C++2a 21.2 [char.traits] p3 (post-P1148R0)
  32 // "If X::char_type is not the same type as C, the program is ill-formed."
  33
  34 std::basic_string_view<char, std::char_traits<char16_t>> s1; // { dg-error "here" }
  35 std::basic_string_view<char32_t, std::char_traits<char>> s2; // { dg-error "here" }
  36
  37 // { dg-prune-output "static assertion failed" }