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// 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>
using namespace std;
#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 string& filename, 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, string* err);
State* state_;
FileReader* file_reader_;
Lexer lexer_;
private:
/// Parse a file, given its contents as a string.
virtual bool Parse(const string& filename, const string& input,
string* err) = 0;
};
#endif // NINJA_PARSER_H_
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