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92 lines
3.3 KiB
C++
92 lines
3.3 KiB
C++
// -*- C++ -*-
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//===------------------------------ span ---------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===---------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
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// <span>
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// constexpr index_type size() const noexcept;
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//
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#include <span>
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#include <cassert>
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#include <string>
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#include "test_macros.h"
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template <typename Span>
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constexpr bool testConstexprSpan(Span sp, ptrdiff_t sz)
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{
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ASSERT_NOEXCEPT(sp.size());
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return sp.size() == sz;
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}
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template <typename Span>
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void testRuntimeSpan(Span sp, ptrdiff_t sz)
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{
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ASSERT_NOEXCEPT(sp.size());
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assert(sp.size() == sz);
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}
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struct A{};
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constexpr int iArr1[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
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int iArr2[] = {10, 11, 12, 13, 14, 15, 16, 17, 18, 19};
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int main ()
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{
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static_assert(testConstexprSpan(std::span<int>(), 0), "");
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static_assert(testConstexprSpan(std::span<long>(), 0), "");
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static_assert(testConstexprSpan(std::span<double>(), 0), "");
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static_assert(testConstexprSpan(std::span<A>(), 0), "");
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static_assert(testConstexprSpan(std::span<std::string>(), 0), "");
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static_assert(testConstexprSpan(std::span<int, 0>(), 0), "");
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static_assert(testConstexprSpan(std::span<long, 0>(), 0), "");
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static_assert(testConstexprSpan(std::span<double, 0>(), 0), "");
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static_assert(testConstexprSpan(std::span<A, 0>(), 0), "");
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static_assert(testConstexprSpan(std::span<std::string, 0>(), 0), "");
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static_assert(testConstexprSpan(std::span<const int>(iArr1, 1), 1), "");
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static_assert(testConstexprSpan(std::span<const int>(iArr1, 2), 2), "");
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static_assert(testConstexprSpan(std::span<const int>(iArr1, 3), 3), "");
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static_assert(testConstexprSpan(std::span<const int>(iArr1, 4), 4), "");
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static_assert(testConstexprSpan(std::span<const int>(iArr1, 5), 5), "");
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testRuntimeSpan(std::span<int> (), 0);
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testRuntimeSpan(std::span<long> (), 0);
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testRuntimeSpan(std::span<double> (), 0);
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testRuntimeSpan(std::span<A> (), 0);
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testRuntimeSpan(std::span<std::string>(), 0);
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testRuntimeSpan(std::span<int, 0> (), 0);
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testRuntimeSpan(std::span<long, 0> (), 0);
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testRuntimeSpan(std::span<double, 0> (), 0);
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testRuntimeSpan(std::span<A, 0> (), 0);
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testRuntimeSpan(std::span<std::string, 0>(), 0);
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testRuntimeSpan(std::span<int>(iArr2, 1), 1);
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testRuntimeSpan(std::span<int>(iArr2, 2), 2);
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testRuntimeSpan(std::span<int>(iArr2, 3), 3);
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testRuntimeSpan(std::span<int>(iArr2, 4), 4);
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testRuntimeSpan(std::span<int>(iArr2, 5), 5);
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testRuntimeSpan(std::span<int, 1>(iArr2 + 5, 1), 1);
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testRuntimeSpan(std::span<int, 2>(iArr2 + 4, 2), 2);
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testRuntimeSpan(std::span<int, 3>(iArr2 + 3, 3), 3);
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testRuntimeSpan(std::span<int, 4>(iArr2 + 2, 4), 4);
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testRuntimeSpan(std::span<int, 5>(iArr2 + 1, 5), 5);
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std::string s;
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testRuntimeSpan(std::span<std::string>(&s, (std::ptrdiff_t) 0), 0);
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testRuntimeSpan(std::span<std::string>(&s, 1), 1);
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}
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