libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivial.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 // is_trivial
  12
  13 #include <type_traits>
  14 #include "test_macros.h"
  15
  16 template <class T>
  17 void test_is_trivial()
  18 {
  19     static_assert( std::is_trivial<T>::value, "");
  20     static_assert( std::is_trivial<const T>::value, "");
  21     static_assert( std::is_trivial<volatile T>::value, "");
  22     static_assert( std::is_trivial<const volatile T>::value, "");
  23 #if TEST_STD_VER > 14
  24     static_assert( std::is_trivial_v<T>, "");
  25     static_assert( std::is_trivial_v<const T>, "");
  26     static_assert( std::is_trivial_v<volatile T>, "");
  27     static_assert( std::is_trivial_v<const volatile T>, "");
  28 #endif
  29 }
  30
  31 template <class T>
  32 void test_is_not_trivial()
  33 {
  34     static_assert(!std::is_trivial<T>::value, "");
  35     static_assert(!std::is_trivial<const T>::value, "");
  36     static_assert(!std::is_trivial<volatile T>::value, "");
  37     static_assert(!std::is_trivial<const volatile T>::value, "");
  38 #if TEST_STD_VER > 14
  39     static_assert(!std::is_trivial_v<T>, "");
  40     static_assert(!std::is_trivial_v<const T>, "");
  41     static_assert(!std::is_trivial_v<volatile T>, "");
  42     static_assert(!std::is_trivial_v<const volatile T>, "");
  43 #endif
  44 }
  45
  46 struct A {};
  47
  48 class B
  49 {
  50 public:
  51     B();
  52 };
  53
  54 int main(int, char**)
  55 {
  56     test_is_trivial<int> ();
  57     test_is_trivial<A> ();
  58
  59     test_is_not_trivial<int&> ();
  60     test_is_not_trivial<volatile int&> ();
  61     test_is_not_trivial<B> ();
  62
  63   return 0;
  64 }