libcxx/test/std/input.output/string.streams/ostringstream/ostringstream.cons/string.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_ostringstream
  15
  16 // template <class SAlloc>
  17 // basic_ostringstream(const basic_string<char_type, traits_type, SAlloc>& s, const Allocator& a)
  18 //     : basic_ostringstream(s, ios_base::out, a) {}
  19
  20 #include <sstream>
  21 #include <cassert>
  22
  23 #include "make_string.h"
  24 #include "test_allocator.h"
  25 #include "test_macros.h"
  26 #include "operator_hijacker.h"
  27
  28 #define STR(S) MAKE_STRING(CharT, S)
  29 #define SV(S) MAKE_STRING_VIEW(CharT, S)
  30
  31 template <class CharT, class Allocator>
  32 static void test(const Allocator& a) {
  33   const std::basic_string<CharT> s(STR("testing"));
  34   const std::basic_ostringstream<CharT, std::char_traits<CharT>, Allocator> ss(s, a);
  35   assert(ss.rdbuf()->get_allocator() == a);
  36   assert(ss.view() == SV("testing"));
  37 }
  38
  39 int main(int, char**) {
  40   test<char>(test_allocator<char>(2));
  41   test<char>(operator_hijacker_allocator<char>());
  42 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  43   test<wchar_t>(test_allocator<wchar_t>(2));
  44   test<wchar_t>(operator_hijacker_allocator<wchar_t>());
  45 #endif
  46   return 0;
  47 }