libcxx/test/std/input.output/string.streams/stringbuf/stringbuf.cons/string.mode.alloc.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 // template <class SAlloc>
  17 // basic_stringbuf(const basic_string<charT, traits, SAlloc>& s, ios_base::openmode which, const Allocator& a);
  18
  19 #include <sstream>
  20 #include <cassert>
  21
  22 #include "make_string.h"
  23 #include "test_allocator.h"
  24 #include "test_macros.h"
  25
  26 #define STR(S) MAKE_STRING(CharT, S)
  27 #define SV(S) MAKE_STRING_VIEW(CharT, S)
  28
  29 template <class CharT>
  30 static void test() {
  31   const std::basic_string<CharT> s(STR("testing"));
  32   const test_allocator<CharT> a(2);
  33   const std::basic_stringbuf<CharT, std::char_traits<CharT>, test_allocator<CharT>> buf(s, std::ios_base::in, a);
  34   assert(buf.get_allocator() == a);
  35   assert(buf.view() == SV("testing"));
  36 }
  37
  38 int main(int, char**) {
  39   test<char>();
  40 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  41   test<wchar_t>();
  42 #endif
  43   return 0;
  44 }