libcxx/test/std/strings/basic.string/string.nonmembers/string.io/stream_insert.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 // <string>
  10
  11 // template<class charT, class traits, class Allocator>
  12 //   basic_ostream<charT, traits>&
  13 //   operator<<(basic_ostream<charT, traits>& os,
  14 //              const basic_string<charT,traits,Allocator>& str);
  15
  16 #include <string>
  17 #include <sstream>
  18 #include <cassert>
  19
  20 #include "test_macros.h"
  21 #include "min_allocator.h"
  22
  23 template <template <class> class Alloc>
  24 void test() {
  25   using S  = std::basic_string<char, std::char_traits<char>, Alloc<char> >;
  26   using OS = std::basic_ostringstream<char, std::char_traits<char>, Alloc<char> >;
  27   {
  28     OS out;
  29     S s("some text");
  30     out << s;
  31     assert(out.good());
  32     assert(s == out.str());
  33   }
  34   {
  35     OS out;
  36     S s("some text");
  37     out.width(12);
  38     out << s;
  39     assert(out.good());
  40     assert("   " + s == out.str());
  41   }
  42 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  43   using WS  = std::basic_string<wchar_t, std::char_traits<wchar_t>, Alloc<wchar_t> >;
  44   using WOS = std::basic_ostringstream<wchar_t, std::char_traits<wchar_t>, Alloc<wchar_t> >;
  45   {
  46     WOS out;
  47     WS s(L"some text");
  48     out << s;
  49     assert(out.good());
  50     assert(s == out.str());
  51   }
  52   {
  53     WOS out;
  54     WS s(L"some text");
  55     out.width(12);
  56     out << s;
  57     assert(out.good());
  58     assert(L"   " + s == out.str());
  59   }
  60 #endif
  61 }
  62
  63 int main(int, char**) {
  64   test<std::allocator>();
  65
  66 #if TEST_STD_VER >= 11
  67   test<min_allocator>();
  68 #endif
  69
  70   return 0;
  71 }