forked from OSchip/llvm-project
153 lines
4.7 KiB
C++
153 lines
4.7 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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// template<class T, ptrdiff_t X, class U, ptrdiff_t Y>
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// constexpr bool operator<=(span<T, X> l, span<U, Y> r);
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//
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//
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// Effects: Equivalent to: return !(r < l);
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//
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#include <span>
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#include <cassert>
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#include "test_macros.h"
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struct A{};
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bool operator==(A, A) {return true;}
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constexpr int iArr1[] = { 0, 1, 2, 1, 2, 5, 6, 7, 8, 9};
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int iArr2[] = { 0, 1, 2, 1, 2, 5, 6, 7, 8, 9};
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constexpr float fArr1[] = {0., 1., 2., 1., 2., 5., 6., 7., 8., 9.};
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float fArr2[] = {0., 1., 2., 1., 2., 5., 6., 7., 8., 9.};
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int main () {
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constexpr std::span<const int> csp0d{};
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constexpr std::span<const int> csp1d{iArr1, 10};
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constexpr std::span<const int> csp2d{iArr1 + 3, 2};
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constexpr std::span<const int> csp3d{iArr1 + 1, 2};
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constexpr std::span<const int> csp4d{iArr1 + 6, 2};
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constexpr std::span<const int, 0> csp0s{};
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constexpr std::span<const int, 10> csp1s{iArr1, 10};
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constexpr std::span<const int, 2> csp2s{iArr1 + 3, 2};
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constexpr std::span<const int, 2> csp3s{iArr1 + 1, 2};
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constexpr std::span<const int, 2> csp4s{iArr1 + 6, 2};
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static_assert( (csp0d <= csp0d), "");
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static_assert( (csp0s <= csp0s), "");
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static_assert( (csp0s <= csp0d), "");
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static_assert( (csp0d <= csp0s), "");
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static_assert( (csp0d <= csp1d), "");
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static_assert( (csp0s <= csp1s), "");
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static_assert( (csp0s <= csp1d), "");
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static_assert( (csp0d <= csp1s), "");
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static_assert( (csp1d <= csp1s), "");
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static_assert( (csp1s <= csp1d), "");
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static_assert( (csp2d <= csp3d), "");
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static_assert( (csp2s <= csp3s), "");
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static_assert( (csp2d <= csp3s), "");
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static_assert( (csp2s <= csp3d), "");
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static_assert( (csp2d <= csp4d), "");
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static_assert( (csp2s <= csp4s), "");
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static_assert( (csp2d <= csp4s), "");
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static_assert( (csp2s <= csp4d), "");
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static_assert(!(csp4d <= csp2d), "");
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static_assert(!(csp4s <= csp2s), "");
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static_assert(!(csp4d <= csp2s), "");
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static_assert(!(csp4s <= csp2d), "");
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std::span<int> sp0d{};
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std::span<int> sp1d{iArr2, 10};
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std::span<int> sp2d{iArr2 + 3, 2};
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std::span<int> sp3d{iArr2 + 1, 2};
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std::span<int> sp4d{iArr2 + 6, 2};
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std::span<int, 0> sp0s{};
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std::span<int, 10> sp1s{iArr2, 10};
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std::span<int, 2> sp2s{iArr2 + 3, 2};
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std::span<int, 2> sp3s{iArr2 + 1, 2};
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std::span<int, 2> sp4s{iArr2 + 6, 2};
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assert( (sp0d <= sp0d));
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assert( (sp0s <= sp0s));
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assert( (sp0s <= sp0d));
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assert( (sp0d <= sp0s));
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assert( (sp0d <= sp1d));
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assert( (sp0s <= sp1s));
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assert( (sp0s <= sp1d));
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assert( (sp0d <= sp1s));
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assert( (sp1d <= sp1s));
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assert( (sp1s <= sp1d));
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assert( (sp2d <= sp3d));
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assert( (sp2s <= sp3s));
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assert( (sp2d <= sp3s));
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assert( (sp2s <= sp3d));
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assert( (sp2d <= sp4d));
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assert( (sp2s <= sp4s));
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assert( (sp2d <= sp4s));
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assert( (sp2s <= sp4d));
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assert(!(sp4d <= sp2d));
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assert(!(sp4s <= sp2s));
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assert(!(sp4d <= sp2s));
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assert(!(sp4s <= sp2d));
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// cross type comparisons
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assert( (csp0d <= sp0d));
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assert( (csp0s <= sp0s));
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assert( (csp0s <= sp0d));
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assert( (csp0d <= sp0s));
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assert( (csp0d <= sp1d));
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assert( (csp0s <= sp1s));
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assert( (csp0s <= sp1d));
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assert( (csp0d <= sp1s));
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assert( (csp1d <= sp1s));
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assert( (csp1s <= sp1d));
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assert( (csp2d <= sp3d));
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assert( (csp2s <= sp3s));
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assert( (csp2d <= sp3s));
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assert( (csp2s <= sp3d));
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assert( (csp2d <= sp4d));
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assert( (csp2s <= sp4s));
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assert( (csp2d <= sp4s));
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assert( (csp2s <= sp4d));
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assert(!(csp4d <= sp2d));
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assert(!(csp4s <= sp2s));
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assert(!(csp4d <= sp2s));
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assert(!(csp4s <= sp2d));
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// More cross-type comparisons (int vs float)
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static_assert(std::span<const float>{fArr1, 8} <= std::span<const int>{iArr1, 9}, "");
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static_assert(std::span<const int>{iArr1, 8} <= std::span<const float>{fArr1, 9}, "");
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assert( (std::span<float>{fArr2} <= std::span<int>{iArr2}));
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assert( (std::span<int>{iArr2} <= std::span<float>{fArr2}));
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static_assert(!(std::span<const int>{iArr1, 9} <= std::span<const float>{fArr1, 8}), "");
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} |