| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| // This test also generates spurious warnings when instantiating std::span |
| // with a very large extent (like size_t(-2)) -- silence those. |
| // ADDITIONAL_COMPILE_FLAGS: -Xclang -verify-ignore-unexpected=warning |
| |
| // <span> |
| |
| // template<size_t Offset, size_t Count = dynamic_extent> |
| // constexpr span<element_type, see-below> subspan() const; |
| // |
| // Mandates: Offset <= Extent && (Count == dynamic_extent || Count <= Extent - Offset) is true. |
| |
| #include <span> |
| #include <cstddef> |
| |
| void f() { |
| int array[] = {1, 2, 3, 4}; |
| std::span<const int, 4> sp(array); |
| |
| // Offset too large templatized |
| [[maybe_unused]] auto s1 = sp.subspan<5>(); // expected-error@span:* {{span<T, N>::subspan<Offset, Count>(): Offset out of range}} |
| |
| // Count too large templatized |
| [[maybe_unused]] auto s2 = sp.subspan<0, 5>(); // expected-error@span:* {{span<T, N>::subspan<Offset, Count>(): Offset + Count out of range}} |
| |
| // Offset + Count too large templatized |
| [[maybe_unused]] auto s3 = sp.subspan<2, 3>(); // expected-error@span:* {{span<T, N>::subspan<Offset, Count>(): Offset + Count out of range}} |
| |
| // Offset + Count overflow templatized |
| [[maybe_unused]] auto s4 = sp.subspan<3, std::size_t(-2)>(); // expected-error@span:* {{span<T, N>::subspan<Offset, Count>(): Offset + Count out of range}}, expected-error-re@span:* {{array is too large{{(.* elements)}}}} |
| } |