221 lines
8.2 KiB
C++
221 lines
8.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// A set of routines for testing the comparison operators of a type
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//
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// FooOrder<expected-ordering> All seven comparison operators, requires C++20 or newer.
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// FooComparison All six pre-C++20 comparison operators
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// FooEquality Equality operators operator== and operator!=
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//
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// AssertXAreNoexcept static_asserts that the operations are all noexcept.
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// AssertXReturnBool static_asserts that the operations return bool.
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// AssertOrderReturn static_asserts that the pre-C++20 comparison operations
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// return bool and operator<=> returns the proper type.
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// AssertXConvertibleToBool static_asserts that the operations return something convertible to bool.
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// testXValues returns the result of the comparison of all operations.
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//
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// AssertOrderConvertibleToBool doesn't exist yet. It will be implemented when needed.
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#ifndef TEST_COMPARISONS_H
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#define TEST_COMPARISONS_H
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#include <type_traits>
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#include <cassert>
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#include "test_macros.h"
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// Test all six comparison operations for sanity
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template <class T, class U = T>
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TEST_CONSTEXPR_CXX14 bool testComparisons(const T& t1, const U& t2, bool isEqual, bool isLess)
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{
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assert(!(isEqual && isLess) && "isEqual and isLess cannot be both true");
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if (isEqual)
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{
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if (!(t1 == t2)) return false;
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if (!(t2 == t1)) return false;
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if ( (t1 != t2)) return false;
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if ( (t2 != t1)) return false;
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if ( (t1 < t2)) return false;
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if ( (t2 < t1)) return false;
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if (!(t1 <= t2)) return false;
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if (!(t2 <= t1)) return false;
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if ( (t1 > t2)) return false;
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if ( (t2 > t1)) return false;
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if (!(t1 >= t2)) return false;
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if (!(t2 >= t1)) return false;
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}
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else if (isLess)
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{
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if ( (t1 == t2)) return false;
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if ( (t2 == t1)) return false;
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if (!(t1 != t2)) return false;
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if (!(t2 != t1)) return false;
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if (!(t1 < t2)) return false;
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if ( (t2 < t1)) return false;
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if (!(t1 <= t2)) return false;
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if ( (t2 <= t1)) return false;
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if ( (t1 > t2)) return false;
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if (!(t2 > t1)) return false;
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if ( (t1 >= t2)) return false;
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if (!(t2 >= t1)) return false;
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}
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else /* greater */
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{
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if ( (t1 == t2)) return false;
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if ( (t2 == t1)) return false;
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if (!(t1 != t2)) return false;
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if (!(t2 != t1)) return false;
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if ( (t1 < t2)) return false;
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if (!(t2 < t1)) return false;
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if ( (t1 <= t2)) return false;
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if (!(t2 <= t1)) return false;
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if (!(t1 > t2)) return false;
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if ( (t2 > t1)) return false;
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if (!(t1 >= t2)) return false;
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if ( (t2 >= t1)) return false;
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}
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return true;
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}
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// Easy call when you can init from something already comparable.
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template <class T, class Param>
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TEST_CONSTEXPR_CXX14 bool testComparisonsValues(Param val1, Param val2)
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{
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const bool isEqual = val1 == val2;
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const bool isLess = val1 < val2;
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return testComparisons(T(val1), T(val2), isEqual, isLess);
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}
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template <class T, class U = T>
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void AssertComparisonsAreNoexcept()
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{
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ASSERT_NOEXCEPT(std::declval<const T&>() == std::declval<const U&>());
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ASSERT_NOEXCEPT(std::declval<const T&>() != std::declval<const U&>());
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ASSERT_NOEXCEPT(std::declval<const T&>() < std::declval<const U&>());
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ASSERT_NOEXCEPT(std::declval<const T&>() <= std::declval<const U&>());
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ASSERT_NOEXCEPT(std::declval<const T&>() > std::declval<const U&>());
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ASSERT_NOEXCEPT(std::declval<const T&>() >= std::declval<const U&>());
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}
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template <class T, class U = T>
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void AssertComparisonsReturnBool()
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{
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ASSERT_SAME_TYPE(decltype(std::declval<const T&>() == std::declval<const U&>()), bool);
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ASSERT_SAME_TYPE(decltype(std::declval<const T&>() != std::declval<const U&>()), bool);
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ASSERT_SAME_TYPE(decltype(std::declval<const T&>() < std::declval<const U&>()), bool);
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ASSERT_SAME_TYPE(decltype(std::declval<const T&>() <= std::declval<const U&>()), bool);
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ASSERT_SAME_TYPE(decltype(std::declval<const T&>() > std::declval<const U&>()), bool);
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ASSERT_SAME_TYPE(decltype(std::declval<const T&>() >= std::declval<const U&>()), bool);
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}
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template <class T, class U = T>
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void AssertComparisonsConvertibleToBool()
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{
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static_assert((std::is_convertible<decltype(std::declval<const T&>() == std::declval<const U&>()), bool>::value), "");
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static_assert((std::is_convertible<decltype(std::declval<const T&>() != std::declval<const U&>()), bool>::value), "");
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static_assert((std::is_convertible<decltype(std::declval<const T&>() < std::declval<const U&>()), bool>::value), "");
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static_assert((std::is_convertible<decltype(std::declval<const T&>() <= std::declval<const U&>()), bool>::value), "");
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static_assert((std::is_convertible<decltype(std::declval<const T&>() > std::declval<const U&>()), bool>::value), "");
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static_assert((std::is_convertible<decltype(std::declval<const T&>() >= std::declval<const U&>()), bool>::value), "");
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}
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#if TEST_STD_VER > 17
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template <class T, class U = T>
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void AssertOrderAreNoexcept() {
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AssertComparisonsAreNoexcept<T, U>();
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ASSERT_NOEXCEPT(std::declval<const T&>() <=> std::declval<const U&>());
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}
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template <class Order, class T, class U = T>
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void AssertOrderReturn() {
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AssertComparisonsReturnBool<T, U>();
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ASSERT_SAME_TYPE(decltype(std::declval<const T&>() <=> std::declval<const U&>()), Order);
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}
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template <class Order, class T, class U = T>
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constexpr bool testOrder(const T& t1, const U& t2, Order order) {
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return (t1 <=> t2 == order) &&
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testComparisons(t1, t2, order == Order::equal || order == Order::equivalent, order == Order::less);
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}
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template <class T, class Param>
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constexpr bool testOrderValues(Param val1, Param val2) {
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return testOrder(T(val1), T(val2), val1 <=> val2);
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}
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#endif
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// Test all two comparison operations for sanity
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template <class T, class U = T>
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TEST_CONSTEXPR_CXX14 bool testEquality(const T& t1, const U& t2, bool isEqual)
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{
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if (isEqual)
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{
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if (!(t1 == t2)) return false;
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if (!(t2 == t1)) return false;
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if ( (t1 != t2)) return false;
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if ( (t2 != t1)) return false;
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}
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else /* not equal */
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{
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if ( (t1 == t2)) return false;
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if ( (t2 == t1)) return false;
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if (!(t1 != t2)) return false;
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if (!(t2 != t1)) return false;
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}
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return true;
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}
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// Easy call when you can init from something already comparable.
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template <class T, class Param>
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TEST_CONSTEXPR_CXX14 bool testEqualityValues(Param val1, Param val2)
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{
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const bool isEqual = val1 == val2;
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return testEquality(T(val1), T(val2), isEqual);
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}
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template <class T, class U = T>
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void AssertEqualityAreNoexcept()
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{
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ASSERT_NOEXCEPT(std::declval<const T&>() == std::declval<const U&>());
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ASSERT_NOEXCEPT(std::declval<const T&>() != std::declval<const U&>());
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}
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template <class T, class U = T>
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void AssertEqualityReturnBool()
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{
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ASSERT_SAME_TYPE(decltype(std::declval<const T&>() == std::declval<const U&>()), bool);
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ASSERT_SAME_TYPE(decltype(std::declval<const T&>() != std::declval<const U&>()), bool);
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}
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template <class T, class U = T>
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void AssertEqualityConvertibleToBool()
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{
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static_assert((std::is_convertible<decltype(std::declval<const T&>() == std::declval<const U&>()), bool>::value), "");
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static_assert((std::is_convertible<decltype(std::declval<const T&>() != std::declval<const U&>()), bool>::value), "");
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}
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struct LessAndEqComp {
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int value;
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TEST_CONSTEXPR_CXX14 LessAndEqComp(int v) : value(v) {}
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friend TEST_CONSTEXPR_CXX14 bool operator<(const LessAndEqComp& lhs, const LessAndEqComp& rhs) {
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return lhs.value < rhs.value;
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}
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friend TEST_CONSTEXPR_CXX14 bool operator==(const LessAndEqComp& lhs, const LessAndEqComp& rhs) {
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return lhs.value == rhs.value;
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}
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};
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#endif // TEST_COMPARISONS_H
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