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 // UNSUPPORTED: libcpp-has-no-incomplete-ranges 11 12 // class std::ranges::subrange; 13 14 #include <ranges> 15 16 #include "types.h" 17 #include <cassert> 18 #include "test_macros.h" 19 #include "test_iterators.h" 20 21 // convertible-to-non-slicing cases: 22 // 1. Not convertible (fail) 23 // 2. Only one is a pointer (succeed) 24 // 3. Both are not pointers (succeed) 25 // 4. Pointer elements are different types (fail) 26 // 5. Pointer elements are same type (succeed) 27 28 // !StoreSize ctor. 29 static_assert( std::is_constructible_v<ForwardSubrange, ForwardIter, ForwardIter>); // Default case. 30 static_assert(!std::is_constructible_v<ForwardSubrange, Empty, ForwardIter>); // 1. 31 static_assert( std::is_constructible_v<ConvertibleForwardSubrange, ConvertibleForwardIter, int*>); // 2. 32 static_assert( std::is_constructible_v<ForwardSubrange, ForwardIter, ForwardIter>); // 3. (Same as default case.) 33 // 4. and 5. must be sized. 34 35 constexpr bool test() { 36 ForwardSubrange a(ForwardIter(globalBuff), ForwardIter(globalBuff + 8)); 37 assert(base(a.begin()) == globalBuff); 38 assert(base(a.end()) == globalBuff + 8); 39 40 ConvertibleForwardSubrange b(ConvertibleForwardIter(globalBuff), globalBuff + 8); 41 assert(b.begin() == globalBuff); 42 assert(b.end() == globalBuff + 8); 43 44 return true; 45 } 46 47 int main(int, char**) { 48 test(); 49 static_assert(test()); 50 51 return 0; 52 } 53