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76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
// 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_any_cast.h
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// -----------------------------------------------------------------------------
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//
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// This header file defines the `absl::bad_any_cast` type.
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#ifndef ABSL_TYPES_BAD_ANY_CAST_H_
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#define ABSL_TYPES_BAD_ANY_CAST_H_
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#include <typeinfo>
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#include "absl/base/config.h"
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#ifdef ABSL_HAVE_STD_ANY
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#include <any>
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namespace absl {
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inline namespace lts_2018_12_18 {
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using std::bad_any_cast;
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} // inline namespace lts_2018_12_18
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} // namespace absl
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#else // ABSL_HAVE_STD_ANY
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namespace absl {
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inline namespace lts_2018_12_18 {
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// -----------------------------------------------------------------------------
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// bad_any_cast
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// -----------------------------------------------------------------------------
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//
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// An `absl::bad_any_cast` type is an exception type that is thrown when
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// failing to successfully cast the return value of an `absl::any` object.
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//
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// Example:
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//
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// auto a = absl::any(65);
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// absl::any_cast<int>(a); // 65
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// try {
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// absl::any_cast<char>(a);
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// } catch(const absl::bad_any_cast& e) {
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// std::cout << "Bad any cast: " << e.what() << '\n';
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// }
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class bad_any_cast : public std::bad_cast {
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public:
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~bad_any_cast() override;
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const char* what() const noexcept override;
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};
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namespace any_internal {
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[[noreturn]] void ThrowBadAnyCast();
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} // namespace any_internal
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} // inline namespace lts_2018_12_18
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} // namespace absl
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#endif // ABSL_HAVE_STD_ANY
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#endif // ABSL_TYPES_BAD_ANY_CAST_H_
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