190 lines
7.0 KiB
C++
190 lines
7.0 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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// XXXX6 tests all six comparison operators
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// XXXX2 tests only op== and op!=
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//
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// AssertComparisonsXAreNoexcept static_asserts that the operations are all noexcept.
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// AssertComparisonsXReturnBool static_asserts that the operations return bool.
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// AssertComparisonsXConvertibleToBool static_asserts that the operations return something convertible to bool.
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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 testComparisons6(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 testComparisons6Values(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 testComparisons6(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 AssertComparisons6AreNoexcept()
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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 AssertComparisons6ReturnBool()
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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 AssertComparisons6ConvertibleToBool()
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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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// 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 testComparisons2(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 testComparisons2Values(Param val1, Param val2)
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{
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const bool isEqual = val1 == val2;
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return testComparisons2(T(val1), T(val2), isEqual);
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}
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template <class T, class U = T>
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void AssertComparisons2AreNoexcept()
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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 AssertComparisons2ReturnBool()
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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 AssertComparisons2ConvertibleToBool()
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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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