libcxx/test/std/ranges/range.factories/range.iota.view/end.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 #include "test_macros.h"
  12
  13 TEST_CLANG_DIAGNOSTIC_IGNORED("-Wsign-compare")
  14 TEST_GCC_DIAGNOSTIC_IGNORED("-Wsign-compare")
  15 TEST_MSVC_DIAGNOSTIC_IGNORED(4018 4389) // various "signed/unsigned mismatch"
  16
  17 // constexpr auto end() const;
  18 // constexpr iterator end() const requires same_as<W, Bound>;
  19
  20 #include <cassert>
  21 #include <ranges>
  22 #include <utility>
  23
  24 #include "types.h"
  25
  26 template<class T, class U>
  27 constexpr void testType(U u) {
  28   {
  29     std::ranges::iota_view<T, U> io(T(0), u);
  30     assert(std::ranges::next(io.begin(), 10) == io.end());
  31   }
  32   {
  33     std::ranges::iota_view<T, U> io(T(10), u);
  34     assert(io.begin() == io.end());
  35     assert(io.begin() == std::move(io).end());
  36   }
  37   {
  38     const std::ranges::iota_view<T, U> io(T(0), u);
  39     assert(std::ranges::next(io.begin(), 10) == io.end());
  40     assert(std::ranges::next(io.begin(), 10) == std::move(io).end());
  41   }
  42   {
  43     const std::ranges::iota_view<T, U> io(T(10), u);
  44     assert(io.begin() == io.end());
  45   }
  46
  47   {
  48     std::ranges::iota_view<T> io(T(0), std::unreachable_sentinel);
  49     assert(io.begin() != io.end());
  50     assert(std::ranges::next(io.begin()) != io.end());
  51     assert(std::ranges::next(io.begin(), 10) != io.end());
  52   }
  53   {
  54     const std::ranges::iota_view<T> io(T(0), std::unreachable_sentinel);
  55     assert(io.begin() != io.end());
  56     assert(std::ranges::next(io.begin()) != io.end());
  57     assert(std::ranges::next(io.begin(), 10) != io.end());
  58   }
  59 }
  60
  61 constexpr bool test() {
  62   testType<SomeInt>(SomeInt(10));
  63   testType<SomeInt>(IntComparableWith(SomeInt(10)));
  64   testType<signed long>(IntComparableWith<signed long>(10));
  65   testType<unsigned long>(IntComparableWith<unsigned long>(10));
  66   testType<int>(IntComparableWith<int>(10));
  67   testType<int>(int(10));
  68   testType<int>(unsigned(10));
  69   testType<unsigned>(unsigned(10));
  70   testType<unsigned>(int(10));
  71   testType<unsigned>(IntComparableWith<unsigned>(10));
  72   testType<short>(short(10));
  73   testType<short>(IntComparableWith<short>(10));
  74   testType<unsigned short>(IntComparableWith<unsigned short>(10));
  75
  76   return true;
  77 }
  78
  79 int main(int, char**) {
  80   test();
  81   static_assert(test());
  82
  83   return 0;
  84 }