/** * Copyright (c) 2021-2025 Huawei Device Co., Ltd. * 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 * * http://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. */ #ifndef RECURSIVE_GUARD_H #define RECURSIVE_GUARD_H namespace ark::es2panda::parser { constexpr unsigned int MAX_RECURSION_DEPTH = 1024; struct RecursiveContext { unsigned depth = 0; }; class TrackRecursive { public: explicit TrackRecursive(RecursiveContext &recursivecontext) : recursivecontext_(recursivecontext) { ++recursivecontext_.depth; valid_ = recursivecontext_.depth <= MAX_RECURSION_DEPTH; }; ~TrackRecursive() { --recursivecontext_.depth; } TrackRecursive(const TrackRecursive &) = delete; TrackRecursive(TrackRecursive &&) = delete; TrackRecursive &operator=(const TrackRecursive &) = delete; TrackRecursive &operator=(TrackRecursive &&) = delete; explicit operator bool() const { return valid_; } private: RecursiveContext &recursivecontext_; bool valid_ = true; }; } // namespace ark::es2panda::parser #endif // UTIL_GUARD_H