| // -*- C++ -*- |
| //===------------------------------ span ---------------------------------===// |
| // |
| // 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++98, c++03, c++11, c++14, c++17 |
| |
| // <span> |
| |
| // constexpr pointer data() const noexcept; |
| // |
| |
| |
| #include <span> |
| #include <cassert> |
| #include <string> |
| |
| #include "test_macros.h" |
| |
| |
| template <typename Span> |
| constexpr bool testConstexprSpan(Span sp, typename Span::pointer ptr) |
| { |
| ASSERT_NOEXCEPT(sp.data()); |
| return sp.data() == ptr; |
| } |
| |
| |
| template <typename Span> |
| void testRuntimeSpan(Span sp, typename Span::pointer ptr) |
| { |
| ASSERT_NOEXCEPT(sp.data()); |
| assert(sp.data() == ptr); |
| } |
| |
| struct A{}; |
| constexpr int iArr1[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9}; |
| int iArr2[] = {10, 11, 12, 13, 14, 15, 16, 17, 18, 19}; |
| |
| int main(int, char**) |
| { |
| |
| // dynamic size |
| static_assert(testConstexprSpan(std::span<int>(), nullptr), ""); |
| static_assert(testConstexprSpan(std::span<long>(), nullptr), ""); |
| static_assert(testConstexprSpan(std::span<double>(), nullptr), ""); |
| static_assert(testConstexprSpan(std::span<A>(), nullptr), ""); |
| static_assert(testConstexprSpan(std::span<std::string>(), nullptr), ""); |
| |
| static_assert(testConstexprSpan(std::span<const int>(iArr1, 1), iArr1), ""); |
| static_assert(testConstexprSpan(std::span<const int>(iArr1, 2), iArr1), ""); |
| static_assert(testConstexprSpan(std::span<const int>(iArr1, 3), iArr1), ""); |
| static_assert(testConstexprSpan(std::span<const int>(iArr1, 4), iArr1), ""); |
| |
| static_assert(testConstexprSpan(std::span<const int>(iArr1 + 1, 1), iArr1 + 1), ""); |
| static_assert(testConstexprSpan(std::span<const int>(iArr1 + 2, 2), iArr1 + 2), ""); |
| static_assert(testConstexprSpan(std::span<const int>(iArr1 + 3, 3), iArr1 + 3), ""); |
| static_assert(testConstexprSpan(std::span<const int>(iArr1 + 4, 4), iArr1 + 4), ""); |
| |
| // static size |
| static_assert(testConstexprSpan(std::span<int, 0>(), nullptr), ""); |
| static_assert(testConstexprSpan(std::span<long, 0>(), nullptr), ""); |
| static_assert(testConstexprSpan(std::span<double, 0>(), nullptr), ""); |
| static_assert(testConstexprSpan(std::span<A, 0>(), nullptr), ""); |
| static_assert(testConstexprSpan(std::span<std::string, 0>(), nullptr), ""); |
| |
| static_assert(testConstexprSpan(std::span<const int, 1>(iArr1, 1), iArr1), ""); |
| static_assert(testConstexprSpan(std::span<const int, 2>(iArr1, 2), iArr1), ""); |
| static_assert(testConstexprSpan(std::span<const int, 3>(iArr1, 3), iArr1), ""); |
| static_assert(testConstexprSpan(std::span<const int, 4>(iArr1, 4), iArr1), ""); |
| |
| static_assert(testConstexprSpan(std::span<const int, 1>(iArr1 + 1, 1), iArr1 + 1), ""); |
| static_assert(testConstexprSpan(std::span<const int, 2>(iArr1 + 2, 2), iArr1 + 2), ""); |
| static_assert(testConstexprSpan(std::span<const int, 3>(iArr1 + 3, 3), iArr1 + 3), ""); |
| static_assert(testConstexprSpan(std::span<const int, 4>(iArr1 + 4, 4), iArr1 + 4), ""); |
| |
| |
| // dynamic size |
| testRuntimeSpan(std::span<int>(), nullptr); |
| testRuntimeSpan(std::span<long>(), nullptr); |
| testRuntimeSpan(std::span<double>(), nullptr); |
| testRuntimeSpan(std::span<A>(), nullptr); |
| testRuntimeSpan(std::span<std::string>(), nullptr); |
| |
| testRuntimeSpan(std::span<int>(iArr2, 1), iArr2); |
| testRuntimeSpan(std::span<int>(iArr2, 2), iArr2); |
| testRuntimeSpan(std::span<int>(iArr2, 3), iArr2); |
| testRuntimeSpan(std::span<int>(iArr2, 4), iArr2); |
| |
| testRuntimeSpan(std::span<int>(iArr2 + 1, 1), iArr2 + 1); |
| testRuntimeSpan(std::span<int>(iArr2 + 2, 2), iArr2 + 2); |
| testRuntimeSpan(std::span<int>(iArr2 + 3, 3), iArr2 + 3); |
| testRuntimeSpan(std::span<int>(iArr2 + 4, 4), iArr2 + 4); |
| |
| // static size |
| testRuntimeSpan(std::span<int, 0>(), nullptr); |
| testRuntimeSpan(std::span<long, 0>(), nullptr); |
| testRuntimeSpan(std::span<double, 0>(), nullptr); |
| testRuntimeSpan(std::span<A, 0>(), nullptr); |
| testRuntimeSpan(std::span<std::string, 0>(), nullptr); |
| |
| testRuntimeSpan(std::span<int, 1>(iArr2, 1), iArr2); |
| testRuntimeSpan(std::span<int, 2>(iArr2, 2), iArr2); |
| testRuntimeSpan(std::span<int, 3>(iArr2, 3), iArr2); |
| testRuntimeSpan(std::span<int, 4>(iArr2, 4), iArr2); |
| |
| testRuntimeSpan(std::span<int, 1>(iArr2 + 1, 1), iArr2 + 1); |
| testRuntimeSpan(std::span<int, 2>(iArr2 + 2, 2), iArr2 + 2); |
| testRuntimeSpan(std::span<int, 3>(iArr2 + 3, 3), iArr2 + 3); |
| testRuntimeSpan(std::span<int, 4>(iArr2 + 4, 4), iArr2 + 4); |
| |
| |
| std::string s; |
| testRuntimeSpan(std::span<std::string>(&s, 1), &s); |
| testRuntimeSpan(std::span<std::string, 1>(&s, 1), &s); |
| |
| |
| return 0; |
| } |