1 /* 2 * Copyright (c) Facebook, Inc. and its affiliates. 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; whatBadPolyAccess31 char const* what() const noexcept override { return "BadPolyAccess"; } 32 }; 33 34 /** 35 * Exception type that is thrown when attempting to extract from a `Poly` a 36 * value of the wrong type. 37 */ 38 struct FOLLY_EXPORT BadPolyCast : std::bad_cast { 39 BadPolyCast() = default; whatBadPolyCast40 char const* what() const noexcept override { return "BadPolyCast"; } 41 }; 42 43 } // namespace folly 44