| // -*- C++ -*- |
| //===------------------------------ span ---------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===---------------------------------------------------------------------===// |
| // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17 |
| |
| // <span> |
| |
| // constexpr index_type size() const noexcept; |
| // |
| |
| |
| #include <span> |
| #include <cassert> |
| #include <string> |
| |
| #include "test_macros.h" |
| |
| |
| template <typename Span> |
| constexpr bool testConstexprSpan(Span sp, ptrdiff_t sz) |
| { |
| ASSERT_NOEXCEPT(sp.size()); |
| return sp.size() == sz; |
| } |
| |
| |
| template <typename Span> |
| void testRuntimeSpan(Span sp, ptrdiff_t sz) |
| { |
| ASSERT_NOEXCEPT(sp.size()); |
| assert(sp.size() == sz); |
| } |
| |
| 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 () |
| { |
| static_assert(testConstexprSpan(std::span<int>(), 0), ""); |
| static_assert(testConstexprSpan(std::span<long>(), 0), ""); |
| static_assert(testConstexprSpan(std::span<double>(), 0), ""); |
| static_assert(testConstexprSpan(std::span<A>(), 0), ""); |
| static_assert(testConstexprSpan(std::span<std::string>(), 0), ""); |
| |
| static_assert(testConstexprSpan(std::span<int, 0>(), 0), ""); |
| static_assert(testConstexprSpan(std::span<long, 0>(), 0), ""); |
| static_assert(testConstexprSpan(std::span<double, 0>(), 0), ""); |
| static_assert(testConstexprSpan(std::span<A, 0>(), 0), ""); |
| static_assert(testConstexprSpan(std::span<std::string, 0>(), 0), ""); |
| |
| static_assert(testConstexprSpan(std::span<const int>(iArr1, 1), 1), ""); |
| static_assert(testConstexprSpan(std::span<const int>(iArr1, 2), 2), ""); |
| static_assert(testConstexprSpan(std::span<const int>(iArr1, 3), 3), ""); |
| static_assert(testConstexprSpan(std::span<const int>(iArr1, 4), 4), ""); |
| static_assert(testConstexprSpan(std::span<const int>(iArr1, 5), 5), ""); |
| |
| testRuntimeSpan(std::span<int> (), 0); |
| testRuntimeSpan(std::span<long> (), 0); |
| testRuntimeSpan(std::span<double> (), 0); |
| testRuntimeSpan(std::span<A> (), 0); |
| testRuntimeSpan(std::span<std::string>(), 0); |
| |
| testRuntimeSpan(std::span<int, 0> (), 0); |
| testRuntimeSpan(std::span<long, 0> (), 0); |
| testRuntimeSpan(std::span<double, 0> (), 0); |
| testRuntimeSpan(std::span<A, 0> (), 0); |
| testRuntimeSpan(std::span<std::string, 0>(), 0); |
| |
| testRuntimeSpan(std::span<int>(iArr2, 1), 1); |
| testRuntimeSpan(std::span<int>(iArr2, 2), 2); |
| testRuntimeSpan(std::span<int>(iArr2, 3), 3); |
| testRuntimeSpan(std::span<int>(iArr2, 4), 4); |
| testRuntimeSpan(std::span<int>(iArr2, 5), 5); |
| |
| testRuntimeSpan(std::span<int, 1>(iArr2 + 5, 1), 1); |
| testRuntimeSpan(std::span<int, 2>(iArr2 + 4, 2), 2); |
| testRuntimeSpan(std::span<int, 3>(iArr2 + 3, 3), 3); |
| testRuntimeSpan(std::span<int, 4>(iArr2 + 2, 4), 4); |
| testRuntimeSpan(std::span<int, 5>(iArr2 + 1, 5), 5); |
| |
| std::string s; |
| testRuntimeSpan(std::span<std::string>(&s, (std::ptrdiff_t) 0), 0); |
| testRuntimeSpan(std::span<std::string>(&s, 1), 1); |
| } |