libcxx/test/std/ranges/range.utility/range.subrange/ctor.range.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 // class std::ranges::subrange;
  12
  13 #include <ranges>
  14
  15 #include "types.h"
  16 #include <cassert>
  17 #include "test_macros.h"
  18 #include "test_iterators.h"
  19
  20 static_assert( std::is_constructible_v<ForwardSubrange, ForwardBorrowedRange>); // Default case.
  21 static_assert(!std::is_constructible_v<ForwardSubrange, ForwardRange>); // Not borrowed.
  22 // Iter convertible to sentinel (pointer) type.
  23 static_assert( std::is_constructible_v<ConvertibleForwardSubrange, ConvertibleForwardBorrowedRange>);
  24 // Where neither iter or sentinel are pointers, but they are different.
  25 static_assert( std::is_constructible_v<DifferentSentinelSubrange, ForwardBorrowedRangeDifferentSentinel>);
  26 static_assert( std::is_constructible_v<DifferentSentinelWithSizeMemberSubrange, DifferentSentinelWithSizeMember>);
  27
  28 constexpr bool test() {
  29   ForwardSubrange a{ForwardBorrowedRange()};
  30   assert(base(a.begin()) == globalBuff);
  31   assert(base(a.end()) == globalBuff + 8);
  32
  33   ConvertibleForwardSubrange b{ConvertibleForwardBorrowedRange()};
  34   assert(b.begin() == globalBuff);
  35   assert(b.end() == globalBuff + 8);
  36
  37   DifferentSentinelSubrange c{ForwardBorrowedRangeDifferentSentinel()};
  38   assert(base(c.begin()) == globalBuff);
  39   assert(c.end().value == globalBuff + 8);
  40
  41   return true;
  42 }
  43
  44 int main(int, char**) {
  45   test();
  46   static_assert(test());
  47
  48   return 0;
  49 }