libcxx/test/std/ranges/range.factories/range.istream.view/general.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: no-localization
  10 // UNSUPPORTED: c++03, c++11, c++14, c++17
  11
  12 // Some basic examples of how istream_view might be used in the wild. This is a general
  13 // collection of sample algorithms and functions that try to mock general usage of
  14 // this view.
  15
  16 #include <algorithm>
  17 #include <cassert>
  18 #include <ranges>
  19 #include <sstream>
  20
  21 #include "test_macros.h"
  22 #include "utils.h"
  23
  24 template <class CharT>
  25 void test() {
  26   auto ints      = make_string_stream<CharT>("0 1  2   3     4");
  27   auto oss       = std::basic_ostringstream<CharT>{};
  28   auto delimiter = make_string<CharT>("-");
  29   std::ranges::copy(
  30       std::ranges::basic_istream_view<int, CharT>(ints), std::ostream_iterator<int, CharT>{oss, delimiter.c_str()});
  31   auto expected = make_string<CharT>("0-1-2-3-4-");
  32   assert(oss.str() == expected);
  33 }
  34
  35 int main(int, char**) {
  36   test<char>();
  37 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
  38   test<wchar_t>();
  39 #endif
  40
  41   return 0;
  42 }