diff --git a/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.float.pass.cpp b/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.float.pass.cpp
index 0d28cff511de..c9fa38694a32 100644
--- a/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.float.pass.cpp
+++ b/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.float.pass.cpp
@@ -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;
 }
diff --git a/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.integer.pass.cpp b/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.integer.pass.cpp
index c506d0776a02..d58397bdfd67 100644
--- a/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.integer.pass.cpp
+++ b/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.integer.pass.cpp
@@ -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;
 }
diff --git a/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.pointer.pass.cpp b/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.pointer.pass.cpp
index e8a25c174076..36092d4af7aa 100644
--- a/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.pointer.pass.cpp
+++ b/libcxx/test/std/numerics/numeric.ops/numeric.ops.midpoint/midpoint.pointer.pass.cpp
@@ -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;
 }