libcxx/test/std/time/time.zone/time.zone.db/time.zone.db.list/iterators.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 // UNSUPPORTED: no-filesystem, no-localization, no-tzdb
  11
  12 // XFAIL: libcpp-has-no-incomplete-tzdb
  13 // XFAIL: availability-tzdb-missing
  14
  15 // TODO TZDB Enable tests
  16 // UNSUPPORTED: c++20, c++23, c++26
  17
  18 // <chrono>
  19 //
  20 // class tzdb_list;
  21 //
  22 // const_iterator begin() const noexcept;
  23 // const_iterator end()   const noexcept;
  24 //
  25 // const_iterator cbegin() const noexcept;
  26 // const_iterator cend()   const noexcept;
  27
  28 #include <chrono>
  29 #include <iterator>
  30 #include <cassert>
  31
  32 int main(int, char**) {
  33   const std::chrono::tzdb_list& list = std::chrono::get_tzdb_list();
  34   using it                           = std::chrono::tzdb_list::const_iterator;
  35
  36   static_assert(noexcept(list.begin()));
  37   static_assert(noexcept(list.end()));
  38   static_assert(noexcept(list.cbegin()));
  39   static_assert(noexcept(list.cend()));
  40
  41   std::same_as<it> auto begin = list.begin();
  42   std::same_as<it> auto end   = list.end();
  43   assert(std::distance(begin, end) == 1);
  44
  45   std::same_as<it> auto cbegin = list.cbegin();
  46   assert(begin == cbegin);
  47
  48   std::same_as<it> auto cend = list.cend();
  49   assert(end == cend);
  50
  51   return 0;
  52 }