75 lines
2.1 KiB
C++
Executable File
75 lines
2.1 KiB
C++
Executable File
// Copyright 2018 The Abseil Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// -----------------------------------------------------------------------------
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// bad_optional_access.h
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// -----------------------------------------------------------------------------
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//
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// This header file defines the `absl::bad_optional_access` type.
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#ifndef ABSL_TYPES_BAD_OPTIONAL_ACCESS_H_
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#define ABSL_TYPES_BAD_OPTIONAL_ACCESS_H_
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#include <stdexcept>
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#include "absl/base/config.h"
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#ifdef ABSL_HAVE_STD_OPTIONAL
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#include <optional>
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namespace absl {
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using std::bad_optional_access;
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} // namespace absl
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#else // ABSL_HAVE_STD_OPTIONAL
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namespace absl {
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// -----------------------------------------------------------------------------
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// bad_optional_access
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// -----------------------------------------------------------------------------
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//
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// An `absl::bad_optional_access` type is an exception type that is thrown when
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// attempting to access an `absl::optional` object that does not contain a
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// value.
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//
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// Example:
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//
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// absl::optional<int> o;
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//
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// try {
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// int n = o.value();
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// } catch(const absl::bad_optional_access& e) {
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// std::cout << "Bad optional access: " << e.what() << '\n';
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// }
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class bad_optional_access : public std::exception {
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public:
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bad_optional_access() = default;
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~bad_optional_access() override;
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const char* what() const noexcept override;
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};
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namespace optional_internal {
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// throw delegator
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[[noreturn]] void throw_bad_optional_access();
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} // namespace optional_internal
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} // namespace absl
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#endif // ABSL_HAVE_STD_OPTIONAL
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#endif // ABSL_TYPES_BAD_OPTIONAL_ACCESS_H_
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