| // 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. |
| |
| #include "parser.h" |
| |
| #include "disk_interface.h" |
| #include "metrics.h" |
| |
| bool Parser::Load(const string& filename, string* err, Lexer* parent) { |
| METRIC_RECORD(".ninja parse"); |
| string contents; |
| string read_err; |
| if (file_reader_->ReadFile(filename, &contents, &read_err) != |
| FileReader::Okay) { |
| *err = "loading '" + filename + "': " + read_err; |
| if (parent) |
| parent->Error(string(*err), err); |
| return false; |
| } |
| |
| // The lexer needs a nul byte at the end of its input, to know when it's done. |
| // It takes a StringPiece, and StringPiece's string constructor uses |
| // string::data(). data()'s return value isn't guaranteed to be |
| // null-terminated (although in practice - libc++, libstdc++, msvc's stl -- |
| // it is, and C++11 demands that too), so add an explicit nul byte. |
| contents.resize(contents.size() + 1); |
| |
| return Parse(filename, contents, err); |
| } |
| |
| bool Parser::ExpectToken(Lexer::Token expected, string* err) { |
| Lexer::Token token = lexer_.ReadToken(); |
| if (token != expected) { |
| string message = string("expected ") + Lexer::TokenName(expected); |
| message += string(", got ") + Lexer::TokenName(token); |
| message += Lexer::TokenErrorHint(expected); |
| return lexer_.Error(message, err); |
| } |
| return true; |
| } |