diff options
Diffstat (limited to 'absl/types/bad_optional_access.h')
| -rw-r--r-- | absl/types/bad_optional_access.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/absl/types/bad_optional_access.h b/absl/types/bad_optional_access.h index c4c74447..e9aa8b83 100644 --- a/absl/types/bad_optional_access.h +++ b/absl/types/bad_optional_access.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_optional_access.h +// ----------------------------------------------------------------------------- +// +// This header file defines the `absl::bad_optional_access` type. #ifndef ABSL_TYPES_BAD_OPTIONAL_ACCESS_H_ #define ABSL_TYPES_BAD_OPTIONAL_ACCESS_H_ @@ -19,6 +25,23 @@ namespace absl { +// ----------------------------------------------------------------------------- +// bad_optional_access +// ----------------------------------------------------------------------------- +// +// An `absl::bad_optional_access` type is an exception type that is thrown when +// attempting to access an `absl::optional` object that does not contain a +// value. +// +// Example: +// +// absl::optional<int> o; +// +// try { +// int n = o.value(); +// } catch(const absl::bad_optional_access& e) { +// std::cout << "Bad optional access: " << e.what() << '\n'; +// } class bad_optional_access : public std::exception { public: bad_optional_access() = default; |