================ @@ -0,0 +1,168 @@ +//===----------------------------------------------------------------------===// +// +// 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, c++23 + +// <span> + +// constexpr reference at(size_type idx) const; // since C++26 + +#include <array> +#include <cassert> +#include <concepts> +#include <limits> +#include <span> +#include <stdexcept> +#include <string> +#include <tuple> +#include <utility> +#include <vector> + +#include "test_macros.h" + +template <typename ReferenceT> +constexpr void testSpanAt(auto&& anySpan, int index, int expectedValue) { + // non-const + { + std::same_as<ReferenceT> decltype(auto) elem = anySpan.at(index); + assert(elem == expectedValue); + } + + // const + { + std::same_as<ReferenceT> decltype(auto) elem = std::as_const(anySpan).at(index); + assert(elem == expectedValue); + } +} + +constexpr bool test() { + // With static extent + { + std::array arr{0, 1, 2, 3, 4, 5, 9084}; + std::span arrSpan{arr}; + + assert(std::dynamic_extent != arrSpan.extent); + + using ReferenceT = typename decltype(arrSpan)::reference; + + testSpanAt<ReferenceT>(arrSpan, 0, 0); + testSpanAt<ReferenceT>(arrSpan, 1, 1); + testSpanAt<ReferenceT>(arrSpan, 6, 9084); + } + + // With dynamic extent + { + std::vector vec{0, 1, 2, 3, 4, 5, 9084}; + std::span vecSpan{vec}; + + assert(std::dynamic_extent == vecSpan.extent); + + using ReferenceT = typename decltype(vecSpan)::reference; + + testSpanAt<ReferenceT>(vecSpan, 0, 0); + testSpanAt<ReferenceT>(vecSpan, 1, 1); + testSpanAt<ReferenceT>(vecSpan, 6, 9084); + } + + return true; +} + +void test_exceptions() { +#ifndef TEST_HAS_NO_EXCEPTIONS + using namespace std::string_literals; + + // With static extent + { + std::array arr{0, 1, 2, 3, 4, 5, 9084, std::numeric_limits<int>::max()}; + const std::span arrSpan{arr}; + + try { + std::ignore = arrSpan.at(arr.size()); + assert(false); + } catch (const std::out_of_range& e) { + // pass + assert(e.what() == "span"s); + } catch (...) { + assert(false); + } + + try { + std::ignore = arrSpan.at(arr.size() - 1); + // pass + assert(arrSpan.at(arr.size() - 1) == std::numeric_limits<int>::max()); + } catch (...) { ---------------- mordante wrote:
please apply this change to similar places too, https://github.com/llvm/llvm-project/pull/74994 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
