1 | /* |
2 | * Copyright 2017-present Facebook, Inc. |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
5 | * you may not use this file except in compliance with the License. |
6 | * You may obtain a copy of the License at |
7 | * |
8 | * http://www.apache.org/licenses/LICENSE-2.0 |
9 | * |
10 | * Unless required by applicable law or agreed to in writing, software |
11 | * distributed under the License is distributed on an "AS IS" BASIS, |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
13 | * See the License for the specific language governing permissions and |
14 | * limitations under the License. |
15 | */ |
16 | |
17 | #pragma once |
18 | |
19 | #include <exception> |
20 | #include <typeinfo> |
21 | |
22 | #include <folly/CPortability.h> |
23 | |
24 | namespace folly { |
25 | |
26 | /** |
27 | * Exception type that is thrown on invalid access of an empty `Poly` object. |
28 | */ |
29 | struct FOLLY_EXPORT BadPolyAccess : std::exception { |
30 | BadPolyAccess() = default; |
31 | char const* what() const noexcept override { |
32 | return "BadPolyAccess" ; |
33 | } |
34 | }; |
35 | |
36 | /** |
37 | * Exception type that is thrown when attempting to extract from a `Poly` a |
38 | * value of the wrong type. |
39 | */ |
40 | struct FOLLY_EXPORT BadPolyCast : std::bad_cast { |
41 | BadPolyCast() = default; |
42 | char const* what() const noexcept override { |
43 | return "BadPolyCast" ; |
44 | } |
45 | }; |
46 | |
47 | } // namespace folly |
48 | |