libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_final.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 // UNSUPPORTED: c++03, c++11
  10 // type_traits
  11
  12 // is_final
  13
  14 #include <type_traits>
  15 #include "test_macros.h"
  16
  17 struct P final { };
  18 union U1 { };
  19 union U2 final { };
  20
  21 template <class T>
  22 void test_is_final()
  23 {
  24     static_assert( std::is_final<T>::value, "");
  25     static_assert( std::is_final<const T>::value, "");
  26     static_assert( std::is_final<volatile T>::value, "");
  27     static_assert( std::is_final<const volatile T>::value, "");
  28 #if TEST_STD_VER > 14
  29     static_assert( std::is_final_v<T>, "");
  30     static_assert( std::is_final_v<const T>, "");
  31     static_assert( std::is_final_v<volatile T>, "");
  32     static_assert( std::is_final_v<const volatile T>, "");
  33 #endif
  34 }
  35
  36 template <class T>
  37 void test_is_not_final()
  38 {
  39     static_assert(!std::is_final<T>::value, "");
  40     static_assert(!std::is_final<const T>::value, "");
  41     static_assert(!std::is_final<volatile T>::value, "");
  42     static_assert(!std::is_final<const volatile T>::value, "");
  43 #if TEST_STD_VER > 14
  44     static_assert(!std::is_final_v<T>, "");
  45     static_assert(!std::is_final_v<const T>, "");
  46     static_assert(!std::is_final_v<volatile T>, "");
  47     static_assert(!std::is_final_v<const volatile T>, "");
  48 #endif
  49 }
  50
  51 int main(int, char**)
  52 {
  53     test_is_not_final<int>();
  54     test_is_not_final<int*>();
  55     test_is_final    <P>();
  56     test_is_not_final<P*>();
  57     test_is_not_final<U1>();
  58     test_is_not_final<U1*>();
  59     test_is_final    <U2>();
  60     test_is_not_final<U2*>();
  61
  62   return 0;
  63 }