libstdc++-v3/testsuite/21_strings/basic_string_view/operations/contains/wchar_t.cc

   1 // { dg-options "-std=gnu++23" }
   2 // { dg-do compile { target c++23 } }
   3
   4 // Copyright (C) 2021-2023 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // basic_string_view contains
  22
  23 #include <string_view>
  24
  25 void
  26 test01()
  27 {
  28     constexpr std::wstring_view haystack = L"no place for needles";
  29
  30     static_assert(haystack.contains(std::wstring_view(L"")));
  31     static_assert(haystack.contains(std::wstring_view(L"no")));
  32     static_assert(haystack.contains(std::wstring_view(L"needles")));
  33     static_assert(haystack.contains(std::wstring_view(L" for ")));
  34     static_assert(!haystack.contains(std::wstring_view(L"places")));
  35
  36     static_assert(!haystack.contains('\0'));
  37     static_assert(haystack.contains('n'));
  38     static_assert(haystack.contains('e'));
  39     static_assert(haystack.contains('s'));
  40     static_assert(!haystack.contains('x'));
  41
  42     static_assert(haystack.contains(L""));
  43     static_assert(haystack.contains(L"no"));
  44     static_assert(haystack.contains(L"needles"));
  45     static_assert(haystack.contains(L" for "));
  46     static_assert(!haystack.contains(L"places"));
  47
  48     constexpr std::wstring_view nothing;
  49     static_assert(nothing.contains(L""));
  50     static_assert(!nothing.contains('\0'));
  51 }