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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.
#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;
}
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