| // Copyright 2018 Google Inc. All Rights Reserved. |
| // |
| // 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 NINJA_PARSER_H_ |
| #define NINJA_PARSER_H_ |
| |
| #include <string> |
| |
| #include "lexer.h" |
| |
| struct FileReader; |
| struct State; |
| |
| /// Base class for parsers. |
| struct Parser { |
| Parser(State* state, FileReader* file_reader) |
| : state_(state), file_reader_(file_reader) {} |
| |
| /// Load and parse a file. |
| bool Load(const std::string& filename, std::string* err, Lexer* parent = NULL); |
| |
| protected: |
| /// If the next token is not \a expected, produce an error string |
| /// saying "expected foo, got bar". |
| bool ExpectToken(Lexer::Token expected, std::string* err); |
| |
| State* state_; |
| FileReader* file_reader_; |
| Lexer lexer_; |
| |
| private: |
| /// Parse a file, given its contents as a string. |
| virtual bool Parse(const std::string& filename, const std::string& input, |
| std::string* err) = 0; |
| }; |
| |
| #endif // NINJA_PARSER_H_ |