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// Copyright 2017 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.
#include "absl/types/bad_variant_access.h"
#ifndef ABSL_USES_STD_VARIANT
#include <cstdlib>
#include <stdexcept>
#include "absl/base/config.h"
#include "absl/base/internal/raw_logging.h"
namespace absl {
ABSL_NAMESPACE_BEGIN
//////////////////////////
// [variant.bad.access] //
//////////////////////////
bad_variant_access::~bad_variant_access() = default;
const char* bad_variant_access::what() const noexcept {
return "Bad variant access";
}
namespace variant_internal {
void ThrowBadVariantAccess() {
#ifdef ABSL_HAVE_EXCEPTIONS
throw bad_variant_access();
#else
ABSL_RAW_LOG(FATAL, "Bad variant access");
abort(); // TODO(calabrese) Remove once RAW_LOG FATAL is noreturn.
#endif
}
void Rethrow() {
#ifdef ABSL_HAVE_EXCEPTIONS
throw;
#else
ABSL_RAW_LOG(FATAL,
"Internal error in absl::variant implementation. Attempted to "
"rethrow an exception when building with exceptions disabled.");
abort(); // TODO(calabrese) Remove once RAW_LOG FATAL is noreturn.
#endif
}
} // namespace variant_internal
ABSL_NAMESPACE_END
} // namespace absl
#else
// https://github.com/abseil/abseil-cpp/issues/1465
// CMake builds on Apple platforms error when libraries are empty.
// Our CMake configuration can avoid this error on header-only libraries,
// but since this library is conditionally empty, including a single
// variable is an easy workaround.
#ifdef __APPLE__
namespace absl {
ABSL_NAMESPACE_BEGIN
namespace types_internal {
extern const char kAvoidEmptyBadVariantAccessLibraryWarning;
const char kAvoidEmptyBadVariantAccessLibraryWarning = 0;
} // namespace types_internal
ABSL_NAMESPACE_END
} // namespace absl
#endif // __APPLE__
#endif // ABSL_USES_STD_VARIANT