189d1853e4
This should improve the time it takes to run the test suite a bit. Right now there are only a handful of headers in the modulemap because we're missing a lot of includes in the tests. New headers should be added there from the start, and we should fill up the modulemap over time until it contains all the test support headers.
96 lines
2.7 KiB
C++
96 lines
2.7 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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// bool signbit(floating-point-type x); // constexpr since C++23
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// We don't control the implementation on windows
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// UNSUPPORTED: windows
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// These compilers don't support constexpr `__builtin_signbit` yet.
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// UNSUPPORTED: apple-clang-17
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// GCC warns about signbit comparing `bool_v < 0`, which we're testing
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// ADDITIONAL_COMPILE_FLAGS(gcc): -Wno-bool-compare
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#include <cassert>
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#include <cmath>
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#include <limits>
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#include <type_traits>
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#include "test_macros.h"
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#include "type_algorithms.h"
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struct TestFloat {
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template <class T>
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static TEST_CONSTEXPR_CXX23 bool test() {
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assert(!std::signbit(T(0)));
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assert(!std::signbit(std::numeric_limits<T>::min()));
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assert(!std::signbit(std::numeric_limits<T>::denorm_min()));
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assert(!std::signbit(std::numeric_limits<T>::max()));
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assert(!std::signbit(std::numeric_limits<T>::infinity()));
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assert(!std::signbit(std::numeric_limits<T>::quiet_NaN()));
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assert(!std::signbit(std::numeric_limits<T>::signaling_NaN()));
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assert(std::signbit(-T(0)));
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assert(std::signbit(-std::numeric_limits<T>::infinity()));
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assert(std::signbit(std::numeric_limits<T>::lowest()));
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return true;
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}
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template <class T>
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TEST_CONSTEXPR_CXX23 void operator()() {
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test<T>();
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#if TEST_STD_VER >= 23
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static_assert(test<T>());
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#endif
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}
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};
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struct TestInt {
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template <class T>
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static TEST_CONSTEXPR_CXX23 bool test() {
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assert(!std::signbit(std::numeric_limits<T>::max()));
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assert(!std::signbit(T(0)));
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if (std::is_unsigned<T>::value) {
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assert(!std::signbit(std::numeric_limits<T>::lowest()));
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} else {
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assert(std::signbit(std::numeric_limits<T>::lowest()));
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}
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return true;
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}
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template <class T>
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TEST_CONSTEXPR_CXX23 void operator()() {
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test<T>();
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#if TEST_STD_VER >= 23
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static_assert(test<T>());
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#endif
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}
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};
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template <typename T>
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struct ConvertibleTo {
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operator T() const { return T(); }
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};
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int main(int, char**) {
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types::for_each(types::floating_point_types(), TestFloat());
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types::for_each(types::integral_types(), TestInt());
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// Make sure we can call `std::signbit` with convertible types. This checks
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// whether overloads for all cv-unqualified floating-point types are working
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// as expected.
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{
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assert(!std::signbit(ConvertibleTo<float>()));
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assert(!std::signbit(ConvertibleTo<double>()));
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assert(!std::signbit(ConvertibleTo<long double>()));
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}
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return 0;
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}
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