72 lines
2 KiB
C++
72 lines
2 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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In addition, as a special exception, the copyright holders give permission
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to link the code of portions of this program with the OpenSSL library.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
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*/
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#pragma once
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#include <QtCore/QString>
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#include <iostream>
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namespace codegen {
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namespace common {
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// Wrapper around std::ostream that adds '\n' to the end of the logging line.
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class LogStream {
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public:
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enum NullType {
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Null,
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};
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explicit LogStream(NullType) : final_(false) {
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}
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explicit LogStream(std::ostream &stream) : stream_(&stream) {
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}
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LogStream(LogStream &&other) : stream_(other.stream_), final_(other.final_) {
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other.final_ = false;
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}
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std::ostream *stream() const {
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return stream_;
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}
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~LogStream() {
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if (final_) {
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*stream_ << '\n';
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}
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}
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private:
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std::ostream *stream_ = nullptr;
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bool final_ = true;
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};
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template <typename T>
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LogStream operator<<(LogStream &&stream, T &&value) {
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if (auto ostream = stream.stream()) {
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*ostream << std::forward<T>(value);
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}
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return std::forward<LogStream>(stream);
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}
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// Outputs file name, line number and error code to std::err. Usage:
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// logError(kErrorFileTooLarge, filepath) << "file too large, size=" << size;
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LogStream logError(int code, const QString &filepath, int line = 0);
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static constexpr int kErrorInternal = 666;
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} // namespace common
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} // namespace codegen
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