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// 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_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_
#include <typeinfo>
#include "absl/base/config.h"
#ifdef ABSL_USES_STD_ANY
#include <any>
namespace absl {
using std::bad_any_cast;
} // namespace absl
#else // ABSL_USES_STD_ANY
namespace absl {
// -----------------------------------------------------------------------------
// 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;
};
namespace any_internal {
[[noreturn]] void ThrowBadAnyCast();
} // namespace any_internal
} // namespace absl
#endif // ABSL_USES_STD_ANY
#endif // ABSL_TYPES_BAD_ANY_CAST_H_
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