diff options
Diffstat (limited to 'absl/types/bad_any_cast.h')
| -rw-r--r-- | absl/types/bad_any_cast.h | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/absl/types/bad_any_cast.h b/absl/types/bad_any_cast.h index 8ffbe4bff473..3b963077d417 100644 --- a/absl/types/bad_any_cast.h +++ b/absl/types/bad_any_cast.h @@ -1,4 +1,4 @@ -// Copyright 2017 The Abseil Authors. +// Copyright 2018 The Abseil Authors. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. @@ -11,6 +11,12 @@ // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. +// +// ----------------------------------------------------------------------------- +// bad_any_cast.h +// ----------------------------------------------------------------------------- +// +// This header file defines the `absl::bad_any_cast` type. #ifndef ABSL_TYPES_BAD_ANY_CAST_H_ #define ABSL_TYPES_BAD_ANY_CAST_H_ @@ -19,21 +25,28 @@ namespace absl { -//////////////////////// -// [any.bad_any_cast] // -//////////////////////// - -// Objects of type bad_any_cast are thrown by a failed any_cast. +// ----------------------------------------------------------------------------- +// bad_any_cast +// ----------------------------------------------------------------------------- +// +// An `absl::bad_any_cast` type is an exception type that is thrown when +// failing to successfully cast the return value of an `absl::any` object. +// +// Example: +// +// auto a = absl::any(65); +// absl::any_cast<int>(a); // 65 +// try { +// absl::any_cast<char>(a); +// } catch(const absl::bad_any_cast& e) { +// std::cout << "Bad any cast: " << e.what() << '\n'; +// } class bad_any_cast : public std::bad_cast { public: ~bad_any_cast() override; const char* what() const noexcept override; }; -////////////////////////////////////////////// -// Implementation-details beyond this point // -////////////////////////////////////////////// - namespace any_internal { [[noreturn]] void ThrowBadAnyCast(); |