libcxx/test/std/input.output/string.streams/stringbuf/stringbuf.cons/string.move.mode.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // UNSUPPORTED: c++03, c++11, c++14, c++17
  10
  11 // <sstream>
  12
  13 // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT>>
  14 // class basic_stringbuf
  15
  16 // explicit basic_stringbuf(basic_string<charT, traits, Allocator>&& s, ios_base::openmode which = ios_base::in | ios_base::out);
  17
  18 #include <sstream>
  19 #include <cassert>
  20
  21 #include "make_string.h"
  22 #include "test_allocator.h"
  23 #include "test_macros.h"
  24
  25 #define STR(S) MAKE_STRING(CharT, S)
  26 #define SV(S) MAKE_STRING_VIEW(CharT, S)
  27
  28 template <class CharT>
  29 static void test() {
  30   {
  31     std::basic_string<CharT> s(STR("testing"));
  32     const std::basic_stringbuf<CharT> buf(std::move(s));
  33     assert(buf.view() == SV("testing"));
  34   }
  35   {
  36     std::basic_string<CharT> s(STR("testing"));
  37     const std::basic_stringbuf<CharT> buf(std::move(s), std::ios_base::out);
  38     assert(buf.view() == SV("testing"));
  39   }
  40   {
  41     std::basic_string<CharT, std::char_traits<CharT>, test_allocator<CharT>> s(STR("testing"));
  42     const std::basic_stringbuf<CharT, std::char_traits<CharT>, test_allocator<CharT>> buf(std::move(s));
  43     assert(buf.view() == SV("testing"));
  44   }
  45   {
  46     std::basic_string<CharT, std::char_traits<CharT>, test_allocator<CharT>> s(STR("testing"));
  47     const std::basic_stringbuf<CharT, std::char_traits<CharT>, test_allocator<CharT>> buf(
  48         std::move(s), std::ios_base::in);
  49     assert(buf.view() == SV("testing"));
  50   }
  51 }
  52
  53 int main(int, char**) {
  54   test<char>();
  55 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  56   test<wchar_t>();
  57 #endif
  58   return 0;
  59 }