libcxx/test/std/ranges/range.factories/range.single.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
  10
  11 // template<class T>
  12 //   single_view(T) -> single_view<T>;
  13
  14 #include <ranges>
  15
  16 #include <cassert>
  17 #include <concepts>
  18
  19 #include "test_iterators.h"
  20
  21 struct Empty {};
  22
  23 static_assert(std::same_as<
  24   decltype(std::ranges::single_view(Empty())),
  25   std::ranges::single_view<Empty>
  26 >);
  27
  28 static_assert(std::same_as<
  29   decltype(std::ranges::single_view(std::declval<Empty&>())),
  30   std::ranges::single_view<Empty>
  31 >);
  32
  33 static_assert(std::same_as<
  34   decltype(std::ranges::single_view(std::declval<Empty&&>())),
  35   std::ranges::single_view<Empty>
  36 >);