//===----------------------------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 // sentinel() = default; #include #include #include struct PODSentinel { bool b; // deliberately uninitialised friend constexpr bool operator==(int*, const PODSentinel& s) { return s.b; } }; struct Range : std::ranges::view_base { int* begin() const; PODSentinel end(); }; constexpr bool test() { { using R = std::ranges::zip_view; using Sentinel = std::ranges::sentinel_t; static_assert(!std::is_same_v>); std::ranges::iterator_t it; Sentinel s1; assert(it != s1); // PODSentinel.b is initialised to false Sentinel s2 = {}; assert(it != s2); // PODSentinel.b is initialised to false } return true; } int main(int, char**) { test(); static_assert(test()); return 0; }