libstdc++-v3/testsuite/21_strings/basic_string_view/operations/string_conversion/1.cc

   1 // { dg-do run { target c++17 } }
   2
   3 // Copyright (C) 2014-2022 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // basic_string_view::to_string
  21
  22 #include <string_view>
  23 #include <string>
  24 #include <algorithm>
  25 #include <testsuite_hooks.h>
  26 #include <testsuite_allocator.h>
  27
  28 void
  29 test01()
  30 {
  31   const char str_lit[] = "123456789A";
  32   const std::string_view sv(str_lit);
  33   char buffer[4] = { 0 };
  34
  35   std::string s1{sv};
  36   VERIFY( s1 == str_lit );
  37   using test_alloc = __gnu_test::tracker_allocator<char>;
  38   std::basic_string<char, std::char_traits<char>, test_alloc>
  39     s2{sv, test_alloc{}};
  40   static_assert( std::is_same<decltype(s2)::allocator_type, test_alloc>::value,
  41                  "to_string() uses custom allocator" );
  42   VERIFY( std::equal(s1.begin(), s1.end(), s2.begin(), s2.end()) );
  43   auto s3 = static_cast<std::string>(sv);
  44   VERIFY( s3 == s1 );
  45 }
  46
  47 int
  48 main()
  49 {
  50   test01();
  51 }