libcxx/test/std/utilities/variant/variant.bad_variant_access/bad_variant_access.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, c++14
  10
  11 // <variant>
  12
  13 /*
  14
  15  class bad_variant_access : public exception {
  16 public:
  17   bad_variant_access() noexcept;
  18   virtual const char* what() const noexcept;
  19 };
  20
  21 */
  22
  23 #include <cassert>
  24 #include <exception>
  25 #include <type_traits>
  26 #include <variant>
  27
  28 #include "test_macros.h"
  29
  30 int main(int, char**) {
  31   static_assert(std::is_base_of<std::exception, std::bad_variant_access>::value,
  32                 "");
  33   static_assert(noexcept(std::bad_variant_access{}), "must be noexcept");
  34   static_assert(noexcept(std::bad_variant_access{}.what()), "must be noexcept");
  35   std::bad_variant_access ex;
  36   assert(ex.what());
  37
  38   return 0;
  39 }