libcxx/test/std/utilities/meta/meta.unary.prop.query/extent.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 // extent
  12
  13 #include <type_traits>
  14
  15 #include "test_macros.h"
  16
  17 template <class T, unsigned A>
  18 void test_extent()
  19 {
  20     static_assert((std::extent<T>::value == A), "");
  21     static_assert((std::extent<const T>::value == A), "");
  22     static_assert((std::extent<volatile T>::value == A), "");
  23     static_assert((std::extent<const volatile T>::value == A), "");
  24 #if TEST_STD_VER > 14
  25     static_assert((std::extent_v<T> == A), "");
  26     static_assert((std::extent_v<const T> == A), "");
  27     static_assert((std::extent_v<volatile T> == A), "");
  28     static_assert((std::extent_v<const volatile T> == A), "");
  29 #endif
  30 }
  31
  32 template <class T, unsigned A>
  33 void test_extent1()
  34 {
  35     static_assert((std::extent<T, 1>::value == A), "");
  36     static_assert((std::extent<const T, 1>::value == A), "");
  37     static_assert((std::extent<volatile T, 1>::value == A), "");
  38     static_assert((std::extent<const volatile T, 1>::value == A), "");
  39 #if TEST_STD_VER > 14
  40     static_assert((std::extent_v<T, 1> == A), "");
  41     static_assert((std::extent_v<const T, 1> == A), "");
  42     static_assert((std::extent_v<volatile T, 1> == A), "");
  43     static_assert((std::extent_v<const volatile T, 1> == A), "");
  44 #endif
  45 }
  46
  47 class Class
  48 {
  49 public:
  50     ~Class();
  51 };
  52
  53 int main(int, char**)
  54 {
  55     test_extent<void, 0>();
  56     test_extent<int&, 0>();
  57     test_extent<Class, 0>();
  58     test_extent<int*, 0>();
  59     test_extent<const int*, 0>();
  60     test_extent<int, 0>();
  61     test_extent<double, 0>();
  62     test_extent<bool, 0>();
  63     test_extent<unsigned, 0>();
  64
  65     test_extent<int[2], 2>();
  66     test_extent<int[2][4], 2>();
  67     test_extent<int[][4], 0>();
  68
  69     test_extent1<int, 0>();
  70     test_extent1<int[2], 0>();
  71     test_extent1<int[2][4], 4>();
  72     test_extent1<int[][4], 4>();
  73
  74   return 0;
  75 }