libcxx/test/std/containers/sequences/array/aggregate.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 // Make sure std::array is an aggregate type.
  10 // We can only check this in C++17 and above, because we don't have the
  11 // trait before that.
  12 // UNSUPPORTED: c++03, c++11, c++14
  13
  14 #include <array>
  15 #include <type_traits>
  16
  17 template <typename T>
  18 void check_aggregate()
  19 {
  20     static_assert(std::is_aggregate<std::array<T, 0> >::value, "");
  21     static_assert(std::is_aggregate<std::array<T, 1> >::value, "");
  22     static_assert(std::is_aggregate<std::array<T, 2> >::value, "");
  23     static_assert(std::is_aggregate<std::array<T, 3> >::value, "");
  24     static_assert(std::is_aggregate<std::array<T, 4> >::value, "");
  25 }
  26
  27 struct Empty { };
  28 struct Trivial { int i; int j; };
  29 struct NonTrivial {
  30     int i; int j;
  31     NonTrivial(NonTrivial const&) { }
  32 };
  33
  34 int main(int, char**)
  35 {
  36     check_aggregate<char>();
  37     check_aggregate<int>();
  38     check_aggregate<long>();
  39     check_aggregate<float>();
  40     check_aggregate<double>();
  41     check_aggregate<long double>();
  42     check_aggregate<Empty>();
  43     check_aggregate<Trivial>();
  44     check_aggregate<NonTrivial>();
  45
  46     return 0;
  47 }