[libc++] Reformat optional constructor tests (#169231)

- Mass-reformat tests in
`std/utilities/optional/optional.object/optional.object.ctor` and
rearrange header `#include`s
- No functional changes
- Prelude for #169203

Author: smallp-o-p

libcxx/test/std/utilities/optional/optional.object/optional.object.ctor/U.pass.cpp

@@ -13,147 +13,145 @@
 // template <class U>
 //   constexpr EXPLICIT optional(U&& u);
 
+#include <cassert>
 #include <optional>
 #include <type_traits>
-#include <cassert>
 
 #include "test_macros.h"
 #include "archetypes.h"
 #include "test_convertible.h"
 
-
 using std::optional;
 
-struct ImplicitThrow
-{
-    constexpr ImplicitThrow(int x) { if (x != -1) TEST_THROW(6);}
+struct ImplicitThrow {
+  constexpr ImplicitThrow(int x) {
+    if (x != -1)
+      TEST_THROW(6);
+  }
 };
 
-struct ExplicitThrow
-{
-    constexpr explicit ExplicitThrow(int x) { if (x != -1) TEST_THROW(6);}
+struct ExplicitThrow {
+  constexpr explicit ExplicitThrow(int x) {
+    if (x != -1)
+      TEST_THROW(6);
+  }
 };
 
 struct ImplicitAny {
   template <class U>
   constexpr ImplicitAny(U&&) {}
 };
 
-
 template <class To, class From>
-constexpr bool implicit_conversion(optional<To>&& opt, const From& v)
-{
-    using O = optional<To>;
-    static_assert(test_convertible<O, From>(), "");
-    static_assert(!test_convertible<O, void*>(), "");
-    static_assert(!test_convertible<O, From, int>(), "");
-    return opt && *opt == static_cast<To>(v);
+constexpr bool implicit_conversion(optional<To>&& opt, const From& v) {
+  using O = optional<To>;
+  static_assert(test_convertible<O, From>(), "");
+  static_assert(!test_convertible<O, void*>(), "");
+  static_assert(!test_convertible<O, From, int>(), "");
+  return opt && *opt == static_cast<To>(v);
 }
 
 template <class To, class Input, class Expect>
-constexpr bool explicit_conversion(Input&& in, const Expect& v)
-{
-    using O = optional<To>;
-    static_assert(std::is_constructible<O, Input>::value, "");
-    static_assert(!std::is_convertible<Input, O>::value, "");
-    static_assert(!std::is_constructible<O, void*>::value, "");
-    static_assert(!std::is_constructible<O, Input, int>::value, "");
-    optional<To> opt(std::forward<Input>(in));
-    optional<To> opt2{std::forward<Input>(in)};
-    return opt && *opt == static_cast<To>(v) && (opt2 && *opt2 == static_cast<To>(v));
+constexpr bool explicit_conversion(Input&& in, const Expect& v) {
+  using O = optional<To>;
+  static_assert(std::is_constructible<O, Input>::value, "");
+  static_assert(!std::is_convertible<Input, O>::value, "");
+  static_assert(!std::is_constructible<O, void*>::value, "");
+  static_assert(!std::is_constructible<O, Input, int>::value, "");
+  optional<To> opt(std::forward<Input>(in));
+  optional<To> opt2{std::forward<Input>(in)};
+  return opt && *opt == static_cast<To>(v) && (opt2 && *opt2 == static_cast<To>(v));
 }
 
-void test_implicit()
-{
-    {
-        static_assert(implicit_conversion<long long>(42, 42), "");
-    }
-    {
-        static_assert(implicit_conversion<long double>(3.14, 3.14), "");
-    }
-    {
-        int x = 42;
-        optional<void* const> o(&x);
-        assert(*o == &x);
-    }
-    {
-        using T = TrivialTestTypes::TestType;
-        static_assert(implicit_conversion<T>(42, 42), "");
-    }
-    {
-        using T = TestTypes::TestType;
-        assert(implicit_conversion<T>(3, T(3)));
-    }
-    {
-      using T = TestTypes::TestType;
-      optional<T> opt({3});
-      assert(opt && *opt == static_cast<T>(3));
-    }
+void test_implicit() {
+  {
+    static_assert(implicit_conversion<long long>(42, 42), "");
+  }
+  {
+    static_assert(implicit_conversion<long double>(3.14, 3.14), "");
+  }
+  {
+    int x = 42;
+    optional<void* const> o(&x);
+    assert(*o == &x);
+  }
+  {
+    using T = TrivialTestTypes::TestType;
+    static_assert(implicit_conversion<T>(42, 42), "");
+  }
+  {
+    using T = TestTypes::TestType;
+    assert(implicit_conversion<T>(3, T(3)));
+  }
+  {
+    using T = TestTypes::TestType;
+    optional<T> opt({3});
+    assert(opt && *opt == static_cast<T>(3));
+  }
   {
     using O = optional<ImplicitAny>;
     static_assert(!test_convertible<O, std::in_place_t>(), "");
     static_assert(!test_convertible<O, std::in_place_t&>(), "");
     static_assert(!test_convertible<O, const std::in_place_t&>(), "");
     static_assert(!test_convertible<O, std::in_place_t&&>(), "");
     static_assert(!test_convertible<O, const std::in_place_t&&>(), "");
-
   }
 #ifndef TEST_HAS_NO_EXCEPTIONS
-    {
-        try {
-            using T = ImplicitThrow;
-            optional<T> t = 42;
-            assert(false);
-            ((void)t);
-        } catch (int) {
-        }
+  {
+    try {
+      using T       = ImplicitThrow;
+      optional<T> t = 42;
+      assert(false);
+      ((void)t);
+    } catch (int) {
     }
+  }
 #endif
 }
 
 void test_explicit() {
+  {
+    using T = ExplicitTrivialTestTypes::TestType;
+    static_assert(explicit_conversion<T>(42, 42), "");
+  }
+  {
+    using T = ExplicitConstexprTestTypes::TestType;
+    static_assert(explicit_conversion<T>(42, 42), "");
+    static_assert(!std::is_convertible<int, T>::value, "");
+  }
+  {
+    using T = ExplicitTestTypes::TestType;
+    T::reset();
     {
-        using T = ExplicitTrivialTestTypes::TestType;
-        static_assert(explicit_conversion<T>(42, 42), "");
-    }
-    {
-        using T = ExplicitConstexprTestTypes::TestType;
-        static_assert(explicit_conversion<T>(42, 42), "");
-        static_assert(!std::is_convertible<int, T>::value, "");
+      assert(explicit_conversion<T>(42, 42));
+      assert(T::alive == 0);
     }
+    T::reset();
     {
-        using T = ExplicitTestTypes::TestType;
-        T::reset();
-        {
-            assert(explicit_conversion<T>(42, 42));
-            assert(T::alive == 0);
-        }
-        T::reset();
-        {
-            optional<T> t(42);
-            assert(T::alive == 1);
-            assert(T::value_constructed == 1);
-            assert(T::move_constructed == 0);
-            assert(T::copy_constructed == 0);
-            assert(t.value().value == 42);
-        }
-        assert(T::alive == 0);
+      optional<T> t(42);
+      assert(T::alive == 1);
+      assert(T::value_constructed == 1);
+      assert(T::move_constructed == 0);
+      assert(T::copy_constructed == 0);
+      assert(t.value().value == 42);
     }
+    assert(T::alive == 0);
+  }
 #ifndef TEST_HAS_NO_EXCEPTIONS
-    {
-        try {
-            using T = ExplicitThrow;
-            optional<T> t(42);
-            assert(false);
-        } catch (int) {
-        }
+  {
+    try {
+      using T = ExplicitThrow;
+      optional<T> t(42);
+      assert(false);
+    } catch (int) {
     }
+  }
 #endif
 }
 
 int main(int, char**) {
-    test_implicit();
-    test_explicit();
+  test_implicit();
+  test_explicit();
 
   return 0;
 }