| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // -*- mode: C++ -*- |
| // |
| // Copyright 2022-2023 Google LLC |
| // |
| // Licensed under the Apache License v2.0 with LLVM Exceptions (the |
| // "License"); you may not use this file except in compliance with the |
| // License. You may obtain a copy of the License at |
| // |
| // https://llvm.org/LICENSE.txt |
| // |
| // 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. |
| // |
| // Author: Giuliano Procida |
| |
| #ifndef STG_FILTER_H_ |
| #define STG_FILTER_H_ |
| |
| #include <memory> |
| #include <ostream> |
| #include <string> |
| |
| namespace stg { |
| |
| // Abstract base class for filtering. |
| class Filter { |
| public: |
| virtual ~Filter() = default; |
| // Filter predicate evaluation. |
| virtual bool operator()(const std::string& item) const = 0; |
| }; |
| |
| // Tokenise and parse a filter expression. |
| std::unique_ptr<Filter> MakeFilter(const std::string& filter); |
| |
| void FilterUsage(std::ostream& os); |
| |
| } // namespace stg |
| |
| #endif // STG_FILTER_H_ |