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