bad_any_cast.h
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1 // Copyright 2018 The Abseil Authors.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 //
15 // -----------------------------------------------------------------------------
16 // bad_any_cast.h
17 // -----------------------------------------------------------------------------
18 //
19 // This header file defines the `absl::bad_any_cast` type.
20 
21 #ifndef ABSL_TYPES_BAD_ANY_CAST_H_
22 #define ABSL_TYPES_BAD_ANY_CAST_H_
23 
24 #include <typeinfo>
25 
26 #include "absl/base/config.h"
27 
28 #ifdef ABSL_HAVE_STD_ANY
29 
30 #include <any>
31 
32 namespace absl {
33 using std::bad_any_cast;
34 } // namespace absl
35 
36 #else // ABSL_HAVE_STD_ANY
37 
38 namespace absl {
39 
40 // -----------------------------------------------------------------------------
41 // bad_any_cast
42 // -----------------------------------------------------------------------------
43 //
44 // An `absl::bad_any_cast` type is an exception type that is thrown when
45 // failing to successfully cast the return value of an `absl::any` object.
46 //
47 // Example:
48 //
49 // auto a = absl::any(65);
50 // absl::any_cast<int>(a); // 65
51 // try {
52 // absl::any_cast<char>(a);
53 // } catch(const absl::bad_any_cast& e) {
54 // std::cout << "Bad any cast: " << e.what() << '\n';
55 // }
56 class bad_any_cast : public std::bad_cast {
57  public:
58  ~bad_any_cast() override;
59  const char* what() const noexcept override;
60 };
61 
62 namespace any_internal {
63 
64 [[noreturn]] void ThrowBadAnyCast();
65 
66 } // namespace any_internal
67 } // namespace absl
68 
69 #endif // ABSL_HAVE_STD_ANY
70 
71 #endif // ABSL_TYPES_BAD_ANY_CAST_H_
Definition: algorithm.h:29
const char * what() const noexceptoverride
Definition: bad_any_cast.cc:28
~bad_any_cast() override


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autogenerated on Wed Jun 19 2019 19:19:56