libcxx/test/std/utilities/meta/meta.unary/meta.unary.cat/nullptr.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // type_traits
  10
  11 // nullptr_t
  12 //  is_null_pointer
  13
  14 // UNSUPPORTED: c++03, c++11
  15
  16 #include <type_traits>
  17 #include <cstddef>        // for std::nullptr_t
  18
  19 #include "test_macros.h"
  20
  21 template <class T>
  22 void test_nullptr_imp()
  23 {
  24     static_assert(!std::is_void<T>::value, "");
  25     static_assert( std::is_null_pointer<T>::value, "");
  26     static_assert(!std::is_integral<T>::value, "");
  27     static_assert(!std::is_floating_point<T>::value, "");
  28     static_assert(!std::is_array<T>::value, "");
  29     static_assert(!std::is_pointer<T>::value, "");
  30     static_assert(!std::is_lvalue_reference<T>::value, "");
  31     static_assert(!std::is_rvalue_reference<T>::value, "");
  32     static_assert(!std::is_member_object_pointer<T>::value, "");
  33     static_assert(!std::is_member_function_pointer<T>::value, "");
  34     static_assert(!std::is_enum<T>::value, "");
  35     static_assert(!std::is_union<T>::value, "");
  36     static_assert(!std::is_class<T>::value, "");
  37     static_assert(!std::is_function<T>::value, "");
  38 }
  39
  40 template <class T>
  41 void test_nullptr()
  42 {
  43     test_nullptr_imp<T>();
  44     test_nullptr_imp<const T>();
  45     test_nullptr_imp<volatile T>();
  46     test_nullptr_imp<const volatile T>();
  47 }
  48
  49 struct incomplete_type;
  50
  51 int main(int, char**)
  52 {
  53     test_nullptr<std::nullptr_t>();
  54
  55 //  LWG#2582
  56     static_assert(!std::is_null_pointer<incomplete_type>::value, "");
  57     return 0;
  58 }