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Diffstat (limited to 'third_party/abseil_cpp/absl/types/bad_optional_access.h')
-rw-r--r-- | third_party/abseil_cpp/absl/types/bad_optional_access.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/third_party/abseil_cpp/absl/types/bad_optional_access.h b/third_party/abseil_cpp/absl/types/bad_optional_access.h new file mode 100644 index 000000000000..a500286adc42 --- /dev/null +++ b/third_party/abseil_cpp/absl/types/bad_optional_access.h @@ -0,0 +1,78 @@ +// 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. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// 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_ + +#include <stdexcept> + +#include "absl/base/config.h" + +#ifdef ABSL_USES_STD_OPTIONAL + +#include <optional> + +namespace absl { +ABSL_NAMESPACE_BEGIN +using std::bad_optional_access; +ABSL_NAMESPACE_END +} // namespace absl + +#else // ABSL_USES_STD_OPTIONAL + +namespace absl { +ABSL_NAMESPACE_BEGIN + +// ----------------------------------------------------------------------------- +// 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; + ~bad_optional_access() override; + const char* what() const noexcept override; +}; + +namespace optional_internal { + +// throw delegator +[[noreturn]] void throw_bad_optional_access(); + +} // namespace optional_internal +ABSL_NAMESPACE_END +} // namespace absl + +#endif // ABSL_USES_STD_OPTIONAL + +#endif // ABSL_TYPES_BAD_OPTIONAL_ACCESS_H_ |