[libc++][NFC] Format std::midpoint tests (#175531)

### Summary

- Format code
- Fix comments

Extracted NFC changes from PR #175388.
This commit is contained in:
eiytoq 2026-02-23 18:53:14 +08:00 committed by GitHub
parent 20bdcbd41d
commit baef055d30
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3 changed files with 236 additions and 240 deletions

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@ -5,18 +5,17 @@
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// REQUIRES: std-at-least-c++20
// <numeric>
// template <class _Float>
// _Tp midpoint(_Float __a, _Float __b) noexcept
//
// template <class _Fp>
// _Fp midpoint(_Fp __a, _Fp __b) noexcept
#include <cassert>
#include <limits>
#include <numeric>
#include <cassert>
#include "test_macros.h"
#include "fp_compare.h"
@ -26,110 +25,114 @@ template <typename T>
constexpr T fp_error_pct();
template <>
constexpr float fp_error_pct<float>() { return 1.0e-4f; }
constexpr float fp_error_pct<float>() {
return 1.0e-4f;
}
template <>
constexpr double fp_error_pct<double>() { return 1.0e-12; }
constexpr double fp_error_pct<double>() {
return 1.0e-12;
}
template <>
constexpr long double fp_error_pct<long double>() { return 1.0e-13l; }
constexpr long double fp_error_pct<long double>() {
return 1.0e-13l;
}
template <typename T>
void fp_test()
{
ASSERT_SAME_TYPE(T, decltype(std::midpoint(T(), T())));
ASSERT_NOEXCEPT( std::midpoint(T(), T()));
void fp_test() {
ASSERT_SAME_TYPE(T, decltype(std::midpoint(T(), T())));
ASSERT_NOEXCEPT(std::midpoint(T(), T()));
constexpr T maxV = std::numeric_limits<T>::max();
constexpr T minV = std::numeric_limits<T>::min();
constexpr T maxV = std::numeric_limits<T>::max();
constexpr T minV = std::numeric_limits<T>::min();
// Things that can be compared exactly
static_assert((std::midpoint(T(0), T(0)) == T(0)), "");
static_assert((std::midpoint(T(2), T(4)) == T(3)), "");
static_assert((std::midpoint(T(4), T(2)) == T(3)), "");
static_assert((std::midpoint(T(3), T(4)) == T(3.5)), "");
static_assert((std::midpoint(T(0), T(0.4)) == T(0.2)), "");
// Things that can be compared exactly
static_assert((std::midpoint(T(0), T(0)) == T(0)), "");
static_assert((std::midpoint(T(2), T(4)) == T(3)), "");
static_assert((std::midpoint(T(4), T(2)) == T(3)), "");
static_assert((std::midpoint(T(3), T(4)) == T(3.5)), "");
static_assert((std::midpoint(T(0), T(0.4)) == T(0.2)), "");
// Things that can't be compared exactly
constexpr T pct = fp_error_pct<T>();
assert((fptest_close_pct(std::midpoint(T( 1.3), T(11.4)), T( 6.35), pct)));
assert((fptest_close_pct(std::midpoint(T(11.33), T(31.45)), T(21.39), pct)));
assert((fptest_close_pct(std::midpoint(T(-1.3), T(11.4)), T( 5.05), pct)));
assert((fptest_close_pct(std::midpoint(T(11.4), T(-1.3)), T( 5.05), pct)));
assert((fptest_close_pct(std::midpoint(T(0.1), T(0.4)), T(0.25), pct)));
// Things that can't be compared exactly
constexpr T pct = fp_error_pct<T>();
assert((fptest_close_pct(std::midpoint(T(1.3), T(11.4)), T(6.35), pct)));
assert((fptest_close_pct(std::midpoint(T(11.33), T(31.45)), T(21.39), pct)));
assert((fptest_close_pct(std::midpoint(T(-1.3), T(11.4)), T(5.05), pct)));
assert((fptest_close_pct(std::midpoint(T(11.4), T(-1.3)), T(5.05), pct)));
assert((fptest_close_pct(std::midpoint(T(0.1), T(0.4)), T(0.25), pct)));
assert((fptest_close_pct(std::midpoint(T(11.2345), T(14.5432)), T(12.88885), pct)));
assert((fptest_close_pct(std::midpoint(T(11.2345), T(14.5432)), T(12.88885), pct)));
// From e to pi
assert((fptest_close_pct(std::midpoint(T(2.71828182845904523536028747135266249775724709369995),
T(3.14159265358979323846264338327950288419716939937510)),
T(2.92993724102441923691146542731608269097720824653752), pct)));
// From e to pi
assert((fptest_close_pct(
std::midpoint(T(2.71828182845904523536028747135266249775724709369995),
T(3.14159265358979323846264338327950288419716939937510)),
T(2.92993724102441923691146542731608269097720824653752),
pct)));
assert((fptest_close_pct(std::midpoint(maxV, T(0)), maxV/2, pct)));
assert((fptest_close_pct(std::midpoint(T(0), maxV), maxV/2, pct)));
assert((fptest_close_pct(std::midpoint(minV, T(0)), minV/2, pct)));
assert((fptest_close_pct(std::midpoint(T(0), minV), minV/2, pct)));
assert((fptest_close_pct(std::midpoint(maxV, maxV), maxV, pct)));
assert((fptest_close_pct(std::midpoint(minV, minV), minV, pct)));
assert((fptest_close_pct(std::midpoint(maxV, minV), maxV/2, pct)));
assert((fptest_close_pct(std::midpoint(minV, maxV), maxV/2, pct)));
assert((fptest_close_pct(std::midpoint(maxV, T(0)), maxV / 2, pct)));
assert((fptest_close_pct(std::midpoint(T(0), maxV), maxV / 2, pct)));
assert((fptest_close_pct(std::midpoint(minV, T(0)), minV / 2, pct)));
assert((fptest_close_pct(std::midpoint(T(0), minV), minV / 2, pct)));
assert((fptest_close_pct(std::midpoint(maxV, maxV), maxV, pct)));
assert((fptest_close_pct(std::midpoint(minV, minV), minV, pct)));
assert((fptest_close_pct(std::midpoint(maxV, minV), maxV / 2, pct)));
assert((fptest_close_pct(std::midpoint(minV, maxV), maxV / 2, pct)));
// Near the min and the max
assert((fptest_close_pct(std::midpoint(maxV*T(0.75), maxV*T(0.50)), maxV*T(0.625), pct)));
assert((fptest_close_pct(std::midpoint(maxV*T(0.50), maxV*T(0.75)), maxV*T(0.625), pct)));
assert((fptest_close_pct(std::midpoint(minV*T(2), minV*T(8)), minV*T(5), pct)));
// Near the min and the max
assert((fptest_close_pct(std::midpoint(maxV * T(0.75), maxV * T(0.50)), maxV * T(0.625), pct)));
assert((fptest_close_pct(std::midpoint(maxV * T(0.50), maxV * T(0.75)), maxV * T(0.625), pct)));
assert((fptest_close_pct(std::midpoint(minV * T(2), minV * T(8)), minV * T(5), pct)));
// Big numbers of different signs
assert((fptest_close_pct(std::midpoint(maxV*T( 0.75), maxV*T(-0.5)), maxV*T( 0.125), pct)));
assert((fptest_close_pct(std::midpoint(maxV*T(-0.75), maxV*T( 0.5)), maxV*T(-0.125), pct)));
// Big numbers of different signs
assert((fptest_close_pct(std::midpoint(maxV * T(0.75), maxV * T(-0.5)), maxV * T(0.125), pct)));
assert((fptest_close_pct(std::midpoint(maxV * T(-0.75), maxV * T(0.5)), maxV * T(-0.125), pct)));
// Denormalized values
// TODO
// Denormalized values
// TODO
// Check two values "close to each other"
T d1 = T(3.14);
T d0 = std::nextafter(d1, T(2));
T d2 = std::nextafter(d1, T(5));
assert(d0 < d1); // sanity checking
assert(d1 < d2); // sanity checking
// Check two values "close to each other"
T d1 = T(3.14);
T d0 = std::nextafter(d1, T(2));
T d2 = std::nextafter(d1, T(5));
assert(d0 < d1); // sanity checking
assert(d1 < d2); // sanity checking
#if defined(__PPC__) && (defined(__LONG_DOUBLE_128__) && __LONG_DOUBLE_128__) && \
!(defined(__LONG_DOUBLE_IEEE128__) && __LONG_DOUBLE_IEEE128__)
// For 128 bit long double implemented as 2 doubles on PowerPC,
// nextafterl() of libm gives imprecise results which fails the
// midpoint() tests below. So skip the test for this case.
if constexpr (sizeof(T) != 16)
// For 128 bit long double implemented as 2 doubles on PowerPC,
// nextafterl() of libm gives imprecise results which fails the
// midpoint() tests below. So skip the test for this case.
if constexpr (sizeof(T) != 16)
#endif
{
{
// Since there's nothing in between, the midpoint has to be one or the other
T res;
res = std::midpoint(d0, d1);
assert(res == d0 || res == d1);
assert(d0 <= res);
assert(res <= d1);
res = std::midpoint(d1, d0);
assert(res == d0 || res == d1);
assert(d0 <= res);
assert(res <= d1);
T res;
res = std::midpoint(d0, d1);
assert(res == d0 || res == d1);
assert(d0 <= res);
assert(res <= d1);
res = std::midpoint(d1, d0);
assert(res == d0 || res == d1);
assert(d0 <= res);
assert(res <= d1);
res = std::midpoint(d1, d2);
assert(res == d1 || res == d2);
assert(d1 <= res);
assert(res <= d2);
res = std::midpoint(d2, d1);
assert(res == d1 || res == d2);
assert(d1 <= res);
assert(res <= d2);
}
res = std::midpoint(d1, d2);
assert(res == d1 || res == d2);
assert(d1 <= res);
assert(res <= d2);
res = std::midpoint(d2, d1);
assert(res == d1 || res == d2);
assert(d1 <= res);
assert(res <= d2);
}
}
int main(int, char**) {
fp_test<float>();
fp_test<double>();
fp_test<long double>();
int main (int, char**)
{
fp_test<float>();
fp_test<double>();
fp_test<long double>();
return 0;
return 0;
}

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@ -5,140 +5,139 @@
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// REQUIRES: std-at-least-c++20
// <numeric>
// template <class _Tp>
// _Tp midpoint(_Tp __a, _Tp __b) noexcept
//
// Constraints:
// - T is an arithmetic type other than bool.
#include <stdint.h>
#include <limits>
#include <numeric>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <limits>
#include <numeric>
#include <stdint.h>
#include "test_macros.h"
template <typename T>
void signed_test()
{
constexpr T zero{0};
constexpr T one{1};
constexpr T two{2};
constexpr T three{3};
constexpr T four{4};
void signed_test() {
constexpr T zero{0};
constexpr T one{1};
constexpr T two{2};
constexpr T three{3};
constexpr T four{4};
ASSERT_SAME_TYPE(decltype(std::midpoint(T(), T())), T);
ASSERT_NOEXCEPT( std::midpoint(T(), T()));
using limits = std::numeric_limits<T>;
ASSERT_SAME_TYPE(decltype(std::midpoint(T(), T())), T);
ASSERT_NOEXCEPT(std::midpoint(T(), T()));
using limits = std::numeric_limits<T>;
static_assert(std::midpoint(one, three) == two, "");
static_assert(std::midpoint(three, one) == two, "");
static_assert(std::midpoint(one, three) == two, "");
static_assert(std::midpoint(three, one) == two, "");
assert(std::midpoint(zero, zero) == zero);
assert(std::midpoint(zero, two) == one);
assert(std::midpoint(two, zero) == one);
assert(std::midpoint(two, two) == two);
assert(std::midpoint(zero, zero) == zero);
assert(std::midpoint(zero, two) == one);
assert(std::midpoint(two, zero) == one);
assert(std::midpoint(two, two) == two);
assert(std::midpoint(one, four) == two);
assert(std::midpoint(four, one) == three);
assert(std::midpoint(three, four) == three);
assert(std::midpoint(four, three) == four);
assert(std::midpoint(one, four) == two);
assert(std::midpoint(four, one) == three);
assert(std::midpoint(three, four) == three);
assert(std::midpoint(four, three) == four);
assert(std::midpoint(T( 3), T( 4)) == T(3));
assert(std::midpoint(T( 4), T( 3)) == T(4));
assert(std::midpoint(T(-3), T( 4)) == T(0));
assert(std::midpoint(T(-4), T( 3)) == T(-1));
assert(std::midpoint(T( 3), T(-4)) == T(0));
assert(std::midpoint(T( 4), T(-3)) == T(1));
assert(std::midpoint(T(-3), T(-4)) == T(-3));
assert(std::midpoint(T(-4), T(-3)) == T(-4));
assert(std::midpoint(T(3), T(4)) == T(3));
assert(std::midpoint(T(4), T(3)) == T(4));
assert(std::midpoint(T(-3), T(4)) == T(0));
assert(std::midpoint(T(-4), T(3)) == T(-1));
assert(std::midpoint(T(3), T(-4)) == T(0));
assert(std::midpoint(T(4), T(-3)) == T(1));
assert(std::midpoint(T(-3), T(-4)) == T(-3));
assert(std::midpoint(T(-4), T(-3)) == T(-4));
static_assert(std::midpoint(limits::min(), limits::max()) == T(-1), "");
static_assert(std::midpoint(limits::max(), limits::min()) == T( 0), "");
static_assert(std::midpoint(limits::min(), limits::max()) == T(-1), "");
static_assert(std::midpoint(limits::max(), limits::min()) == T(0), "");
static_assert(std::midpoint(limits::min(), T(6)) == limits::min()/2 + 3, "");
assert( std::midpoint(T(6), limits::min()) == limits::min()/2 + 3);
assert( std::midpoint(limits::max(), T(6)) == limits::max()/2 + 4);
static_assert(std::midpoint(T(6), limits::max()) == limits::max()/2 + 3, "");
static_assert(std::midpoint(limits::min(), T(6)) == limits::min() / 2 + 3, "");
assert(std::midpoint(T(6), limits::min()) == limits::min() / 2 + 3);
assert(std::midpoint(limits::max(), T(6)) == limits::max() / 2 + 4);
static_assert(std::midpoint(T(6), limits::max()) == limits::max() / 2 + 3, "");
assert( std::midpoint(limits::min(), T(-6)) == limits::min()/2 - 3);
static_assert(std::midpoint(T(-6), limits::min()) == limits::min()/2 - 3, "");
static_assert(std::midpoint(limits::max(), T(-6)) == limits::max()/2 - 2, "");
assert( std::midpoint(T(-6), limits::max()) == limits::max()/2 - 3);
assert(std::midpoint(limits::min(), T(-6)) == limits::min() / 2 - 3);
static_assert(std::midpoint(T(-6), limits::min()) == limits::min() / 2 - 3, "");
static_assert(std::midpoint(limits::max(), T(-6)) == limits::max() / 2 - 2, "");
assert(std::midpoint(T(-6), limits::max()) == limits::max() / 2 - 3);
}
template <typename T>
void unsigned_test()
{
constexpr T zero{0};
constexpr T one{1};
constexpr T two{2};
constexpr T three{3};
constexpr T four{4};
void unsigned_test() {
constexpr T zero{0};
constexpr T one{1};
constexpr T two{2};
constexpr T three{3};
constexpr T four{4};
ASSERT_SAME_TYPE(decltype(std::midpoint(T(), T())), T);
ASSERT_NOEXCEPT( std::midpoint(T(), T()));
using limits = std::numeric_limits<T>;
const T half_way = (limits::max() - limits::min())/2;
ASSERT_SAME_TYPE(decltype(std::midpoint(T(), T())), T);
ASSERT_NOEXCEPT(std::midpoint(T(), T()));
using limits = std::numeric_limits<T>;
const T half_way = (limits::max() - limits::min()) / 2;
static_assert(std::midpoint(one, three) == two, "");
static_assert(std::midpoint(three, one) == two, "");
static_assert(std::midpoint(one, three) == two, "");
static_assert(std::midpoint(three, one) == two, "");
assert(std::midpoint(zero, zero) == zero);
assert(std::midpoint(zero, two) == one);
assert(std::midpoint(two, zero) == one);
assert(std::midpoint(two, two) == two);
assert(std::midpoint(zero, zero) == zero);
assert(std::midpoint(zero, two) == one);
assert(std::midpoint(two, zero) == one);
assert(std::midpoint(two, two) == two);
assert(std::midpoint(one, four) == two);
assert(std::midpoint(four, one) == three);
assert(std::midpoint(three, four) == three);
assert(std::midpoint(four, three) == four);
assert(std::midpoint(one, four) == two);
assert(std::midpoint(four, one) == three);
assert(std::midpoint(three, four) == three);
assert(std::midpoint(four, three) == four);
assert(std::midpoint(limits::min(), limits::max()) == T(half_way));
assert(std::midpoint(limits::max(), limits::min()) == T(half_way + 1));
assert(std::midpoint(limits::min(), limits::max()) == T(half_way));
assert(std::midpoint(limits::max(), limits::min()) == T(half_way + 1));
static_assert(std::midpoint(limits::min(), T(6)) == limits::min()/2 + 3, "");
assert( std::midpoint(T(6), limits::min()) == limits::min()/2 + 3);
assert( std::midpoint(limits::max(), T(6)) == half_way + 4);
static_assert(std::midpoint(T(6), limits::max()) == half_way + 3, "");
static_assert(std::midpoint(limits::min(), T(6)) == limits::min() / 2 + 3, "");
assert(std::midpoint(T(6), limits::min()) == limits::min() / 2 + 3);
assert(std::midpoint(limits::max(), T(6)) == half_way + 4);
static_assert(std::midpoint(T(6), limits::max()) == half_way + 3, "");
}
int main(int, char**) {
signed_test<signed char>();
signed_test<short>();
signed_test<int>();
signed_test<long>();
signed_test<long long>();
int main(int, char**)
{
signed_test<signed char>();
signed_test<short>();
signed_test<int>();
signed_test<long>();
signed_test<long long>();
signed_test<std::int8_t>();
signed_test<std::int16_t>();
signed_test<std::int32_t>();
signed_test<std::int64_t>();
signed_test<std::int8_t>();
signed_test<std::int16_t>();
signed_test<std::int32_t>();
signed_test<std::int64_t>();
unsigned_test<unsigned char>();
unsigned_test<unsigned short>();
unsigned_test<unsigned int>();
unsigned_test<unsigned long>();
unsigned_test<unsigned long long>();
unsigned_test<unsigned char>();
unsigned_test<unsigned short>();
unsigned_test<unsigned int>();
unsigned_test<unsigned long>();
unsigned_test<unsigned long long>();
unsigned_test<std::uint8_t>();
unsigned_test<std::uint16_t>();
unsigned_test<std::uint32_t>();
unsigned_test<std::uint64_t>();
unsigned_test<std::uint8_t>();
unsigned_test<std::uint16_t>();
unsigned_test<std::uint32_t>();
unsigned_test<std::uint64_t>();
#ifndef TEST_HAS_NO_INT128
unsigned_test<__uint128_t>();
signed_test<__int128_t>();
unsigned_test<__uint128_t>();
signed_test<__int128_t>();
#endif
// int_test<char>();
signed_test<std::ptrdiff_t>();
unsigned_test<std::size_t>();
// int_test<char>();
signed_test<std::ptrdiff_t>();
unsigned_test<std::size_t>();
return 0;
return 0;
}

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@ -5,8 +5,8 @@
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// REQUIRES: std-at-least-c++20
// MSVC warning C5215: a function parameter with a volatile qualified type is deprecated in C++20
// MSVC warning C5216: a volatile qualified return type is deprecated in C++20
@ -16,83 +16,77 @@
// template <class _Tp>
// _Tp* midpoint(_Tp* __a, _Tp* __b) noexcept
//
// Constraints:
// - T is a complete object type.
#include <numeric>
#include <cassert>
#include <numeric>
#include "test_macros.h"
template <typename T>
constexpr void constexpr_test()
{
constexpr T array[1000] = {};
ASSERT_SAME_TYPE(decltype(std::midpoint(array, array)), const T*);
ASSERT_NOEXCEPT( std::midpoint(array, array));
constexpr void constexpr_test() {
constexpr T array[1000] = {};
ASSERT_SAME_TYPE(decltype(std::midpoint(array, array)), const T*);
ASSERT_NOEXCEPT(std::midpoint(array, array));
static_assert(std::midpoint(array, array) == array, "");
static_assert(std::midpoint(array, array + 1000) == array + 500, "");
static_assert(std::midpoint(array, array) == array, "");
static_assert(std::midpoint(array, array + 1000) == array + 500, "");
static_assert(std::midpoint(array, array + 9) == array + 4, "");
static_assert(std::midpoint(array, array + 10) == array + 5, "");
static_assert(std::midpoint(array, array + 11) == array + 5, "");
static_assert(std::midpoint(array + 9, array) == array + 5, "");
static_assert(std::midpoint(array + 10, array) == array + 5, "");
static_assert(std::midpoint(array + 11, array) == array + 6, "");
static_assert(std::midpoint(array, array + 9) == array + 4, "");
static_assert(std::midpoint(array, array + 10) == array + 5, "");
static_assert(std::midpoint(array, array + 11) == array + 5, "");
static_assert(std::midpoint(array + 9, array) == array + 5, "");
static_assert(std::midpoint(array + 10, array) == array + 5, "");
static_assert(std::midpoint(array + 11, array) == array + 6, "");
}
template <typename T>
void runtime_test()
{
T array[1000] = {}; // we need an array to make valid pointers
ASSERT_SAME_TYPE(decltype(std::midpoint(array, array)), T*);
ASSERT_NOEXCEPT( std::midpoint(array, array));
void runtime_test() {
T array[1000] = {}; // we need an array to make valid pointers
ASSERT_SAME_TYPE(decltype(std::midpoint(array, array)), T*);
ASSERT_NOEXCEPT(std::midpoint(array, array));
assert(std::midpoint(array, array) == array);
assert(std::midpoint(array, array + 1000) == array + 500);
assert(std::midpoint(array, array) == array);
assert(std::midpoint(array, array + 1000) == array + 500);
assert(std::midpoint(array, array + 9) == array + 4);
assert(std::midpoint(array, array + 10) == array + 5);
assert(std::midpoint(array, array + 11) == array + 5);
assert(std::midpoint(array + 9, array) == array + 5);
assert(std::midpoint(array + 10, array) == array + 5);
assert(std::midpoint(array + 11, array) == array + 6);
assert(std::midpoint(array, array + 9) == array + 4);
assert(std::midpoint(array, array + 10) == array + 5);
assert(std::midpoint(array, array + 11) == array + 5);
assert(std::midpoint(array + 9, array) == array + 5);
assert(std::midpoint(array + 10, array) == array + 5);
assert(std::midpoint(array + 11, array) == array + 6);
// explicit instantiation
ASSERT_SAME_TYPE(decltype(std::midpoint<T>(array, array)), T*);
ASSERT_NOEXCEPT(std::midpoint<T>(array, array));
assert(std::midpoint<T>(array, array) == array);
assert(std::midpoint<T>(array, array + 1000) == array + 500);
// explicit instantiation
ASSERT_SAME_TYPE(decltype(std::midpoint<T>(array, array)), T*);
ASSERT_NOEXCEPT(std::midpoint<T>(array, array));
assert(std::midpoint<T>(array, array) == array);
assert(std::midpoint<T>(array, array + 1000) == array + 500);
}
template <typename T>
void pointer_test()
{
runtime_test< T>();
runtime_test<const T>();
runtime_test< volatile T>();
runtime_test<const volatile T>();
void pointer_test() {
runtime_test< T>();
runtime_test<const T>();
runtime_test< volatile T>();
runtime_test<const volatile T>();
// The constexpr tests are always const, but we can test them anyway.
constexpr_test< T>();
constexpr_test<const T>();
// The constexpr tests are always const, but we can test them anyway.
constexpr_test< T>();
constexpr_test<const T>();
// GCC 9.0.1 (unreleased as of 2019-03) barfs on this, but we have a bot for it.
// Uncomment when gcc 9.1 is released
#ifndef TEST_COMPILER_GCC
constexpr_test< volatile T>();
constexpr_test<const volatile T>();
constexpr_test< volatile T>();
constexpr_test<const volatile T>();
#endif
}
int main(int, char**) {
pointer_test<char>();
pointer_test<int>();
pointer_test<double>();
int main(int, char**)
{
pointer_test<char>();
pointer_test<int>();
pointer_test<double>();
return 0;
return 0;
}