forked from OSchip/llvm-project
110 lines
3.0 KiB
C++
110 lines
3.0 KiB
C++
//===----------------------------------------------------------------------===//
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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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// <array>
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// These are all constexpr in C++20
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// bool operator==(array<T, N> const&, array<T, N> const&);
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// bool operator!=(array<T, N> const&, array<T, N> const&);
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// bool operator<(array<T, N> const&, array<T, N> const&);
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// bool operator<=(array<T, N> const&, array<T, N> const&);
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// bool operator>(array<T, N> const&, array<T, N> const&);
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// bool operator>=(array<T, N> const&, array<T, N> const&);
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#include <array>
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#include <vector>
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#include <cassert>
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#include "test_macros.h"
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// std::array is explicitly allowed to be initialized with A a = { init-list };.
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// Disable the missing braces warning for this reason.
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#include "disable_missing_braces_warning.h"
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template <class Array>
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void test_compare(const Array& LHS, const Array& RHS) {
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typedef std::vector<typename Array::value_type> Vector;
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const Vector LHSV(LHS.begin(), LHS.end());
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const Vector RHSV(RHS.begin(), RHS.end());
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assert((LHS == RHS) == (LHSV == RHSV));
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assert((LHS != RHS) == (LHSV != RHSV));
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assert((LHS < RHS) == (LHSV < RHSV));
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assert((LHS <= RHS) == (LHSV <= RHSV));
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assert((LHS > RHS) == (LHSV > RHSV));
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assert((LHS >= RHS) == (LHSV >= RHSV));
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}
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#if TEST_STD_VER > 17
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template <class Array>
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constexpr bool constexpr_compare(const Array &lhs, const Array &rhs, bool isEqual, bool isLess)
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{
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if (isEqual)
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{
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if (!(lhs == rhs)) return false;
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if ( (lhs != rhs)) return false;
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if ( (lhs < rhs)) return false;
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if (!(lhs <= rhs)) return false;
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if ( (lhs > rhs)) return false;
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if (!(lhs >= rhs)) return false;
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}
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else if (isLess)
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{
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if ( (lhs == rhs)) return false;
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if (!(lhs != rhs)) return false;
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if (!(lhs < rhs)) return false;
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if (!(lhs <= rhs)) return false;
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if ( (lhs > rhs)) return false;
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if ( (lhs >= rhs)) return false;
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}
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else // greater
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{
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if ( (lhs == rhs)) return false;
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if (!(lhs != rhs)) return false;
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if ( (lhs < rhs)) return false;
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if ( (lhs <= rhs)) return false;
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if (!(lhs > rhs)) return false;
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if (!(lhs >= rhs)) return false;
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}
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return true;
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}
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#endif
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int main()
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{
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{
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typedef int T;
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typedef std::array<T, 3> C;
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C c1 = {1, 2, 3};
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C c2 = {1, 2, 3};
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C c3 = {3, 2, 1};
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C c4 = {1, 2, 1};
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test_compare(c1, c2);
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test_compare(c1, c3);
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test_compare(c1, c4);
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}
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{
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typedef int T;
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typedef std::array<T, 0> C;
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C c1 = {};
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C c2 = {};
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test_compare(c1, c2);
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}
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#if TEST_STD_VER > 17
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{
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constexpr std::array<int, 3> a1 = {1, 2, 3};
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constexpr std::array<int, 3> a2 = {2, 3, 4};
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static_assert(constexpr_compare(a1, a1, true, false), "");
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static_assert(constexpr_compare(a1, a2, false, true), "");
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static_assert(constexpr_compare(a2, a1, false, false), "");
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}
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#endif
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}
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