libcxx/test/std/ranges/range.factories/range.repeat.view/ctad.compile.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, c++20
  10
  11 // template<class T, class Bound>
  12 //    repeat_view(T, Bound) -> repeat_view<T, Bound>;
  13
  14 #include <concepts>
  15 #include <ranges>
  16 #include <utility>
  17
  18 struct Empty {};
  19
  20 // clang-format off
  21 static_assert(std::same_as<decltype(std::ranges::repeat_view(Empty())), std::ranges::repeat_view<Empty>>);
  22 static_assert(std::same_as<decltype(std::ranges::repeat_view(std::declval<Empty&>())), std::ranges::repeat_view<Empty>>);
  23 static_assert(std::same_as<decltype(std::ranges::repeat_view(std::declval<Empty&&>())), std::ranges::repeat_view<Empty>>);
  24 static_assert(std::same_as<decltype(std::ranges::repeat_view(10, 1)), std::ranges::repeat_view<int, int>>);
  25 static_assert(std::same_as<decltype(std::ranges::repeat_view(10, 1U)), std::ranges::repeat_view<int, unsigned>>);
  26 static_assert(std::same_as<decltype(std::ranges::repeat_view(10, 1UL)), std::ranges::repeat_view<int, unsigned long>>);
  27
  28 using RPV = std::ranges::repeat_view<const char*>;
  29 static_assert(std::same_as<decltype(std::ranges::repeat_view("foo", std::unreachable_sentinel)), RPV>);  // OK
  30 static_assert(std::same_as<decltype(std::ranges::repeat_view(+"foo", std::unreachable_sentinel)), RPV>); // OK
  31 static_assert(std::same_as<decltype(std::ranges::repeat_view("foo")), RPV>);                             // OK since LWG4053
  32 static_assert(std::same_as<decltype(std::ranges::repeat_view(+"foo")), RPV>);                            // OK
  33 // clang-format on