1// Copyright 2018 Google Inc. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#include "parser.h"
16
17#include "disk_interface.h"
18#include "metrics.h"
19
20using namespace std;
21
22bool Parser::Load(const string& filename, string* err, Lexer* parent) {
23 METRIC_RECORD(".ninja parse");
24 string contents;
25 string read_err;
26 if (file_reader_->ReadFile(filename, &contents, &read_err) !=
27 FileReader::Okay) {
28 *err = "loading '" + filename + "': " + read_err;
29 if (parent)
30 parent->Error(string(*err), err);
31 return false;
32 }
33
34 return Parse(filename, contents, err);
35}
36
37bool Parser::ExpectToken(Lexer::Token expected, string* err) {
38 Lexer::Token token = lexer_.ReadToken();
39 if (token != expected) {
40 string message = string("expected ") + Lexer::TokenName(expected);
41 message += string(", got ") + Lexer::TokenName(token);
42 message += Lexer::TokenErrorHint(expected);
43 return lexer_.Error(message, err);
44 }
45 return true;
46}
47