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284 lines
7.7 KiB
C++
284 lines
7.7 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Copyright (C) 2016-2019 Ivailo Monev
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**
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** This file is part of the QtCore module of the Katie Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qdebug.h"
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// This file is needed to force compilation of QDebug into the kernel library.
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/*!
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\class QDebug
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\brief The QDebug class provides an output stream for debugging information.
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QDebug is used whenever the developer needs to write out debugging or tracing
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information to a device, file, string or console.
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\section1 Basic Use
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In the common case, it is useful to call the qDebug() function to obtain a
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default QDebug object to use for writing debugging information.
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\snippet doc/src/snippets/qdebug/qdebugsnippet.cpp 1
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This constructs a QDebug object using the constructor that accepts a QtMsgType
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value of QtDebugMsg. Similarly, the qWarning(), qCritical() and qFatal()
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functions also return QDebug objects for the corresponding message types.
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The class also provides several constructors for other situations, including
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a constructor that accepts a QFile or any other QIODevice subclass that is
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used to write debugging information to files and other devices. The constructor
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that accepts a QString is used to write to a string for display or serialization.
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\section1 Writing Custom Types to a Stream
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Many standard types can be written to QDebug objects, and Qt provides support for
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most Qt value types. To add support for custom types, you need to implement a
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streaming operator, as in the following example:
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\snippet doc/src/snippets/qdebug/qdebugsnippet.cpp 0
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This is described in the \l{Debugging Techniques} and
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\l{Creating Custom Qt Types#Making the Type Printable}{Creating Custom Qt Types}
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documents.
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*/
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/*!
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\fn QDebug::QDebug(QIODevice *device)
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Constructs a debug stream that writes to the given \a device.
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*/
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/*!
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\fn QDebug::QDebug(QString *string)
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Constructs a debug stream that writes to the given \a string.
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*/
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/*!
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\fn QDebug::QDebug(QtMsgType type)
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Constructs a debug stream that writes to the handler for the message type specified by \a type.
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*/
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/*!
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\fn QDebug::QDebug(const QDebug &other)
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Constructs a copy of the \a other debug stream.
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*/
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/*!
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\fn QDebug &QDebug::operator=(const QDebug &other)
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Assigns the \a other debug stream to this stream and returns a reference to
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this stream.
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*/
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/*!
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\fn QDebug::~QDebug()
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Flushes any pending data to be written and destroys the debug stream.
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*/
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/*!
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\fn QDebug &QDebug::space()
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Writes a space character to the debug stream and returns a reference to
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the stream.
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The stream will record that the last character sent to the stream was a
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space.
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\sa nospace(), maybeSpace()
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*/
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/*!
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\fn QDebug &QDebug::nospace()
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Clears the stream's internal flag that records whether the last character
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was a space and returns a reference to the stream.
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\sa space(), maybeSpace()
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*/
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/*!
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\fn QDebug &QDebug::maybeSpace()
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Writes a space character to the debug stream, depending on the last
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character sent to the stream, and returns a reference to the stream.
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If the last character was a space character, this function writes a space
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character to the stream; otherwise, no characters are written to the stream.
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\sa space(), nospace()
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*/
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/*!
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\fn QDebug &QDebug::operator<<(QChar t)
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Writes the character, \a t, to the stream and returns a reference to the
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stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(bool t)
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Writes the boolean value, \a t, to the stream and returns a reference to the
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stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(char t)
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Writes the character, \a t, to the stream and returns a reference to the
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stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(signed short i)
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Writes the signed short integer, \a i, to the stream and returns a reference
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to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(unsigned short i)
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Writes then unsigned short integer, \a i, to the stream and returns a
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reference to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(signed int i)
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Writes the signed integer, \a i, to the stream and returns a reference
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to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(unsigned int i)
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Writes then unsigned integer, \a i, to the stream and returns a reference to
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the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(signed long l)
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Writes the signed long integer, \a l, to the stream and returns a reference
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to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(unsigned long l)
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Writes then unsigned long integer, \a l, to the stream and returns a reference
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to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(qint64 i)
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Writes the signed 64-bit integer, \a i, to the stream and returns a reference
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to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(quint64 i)
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Writes then unsigned 64-bit integer, \a i, to the stream and returns a
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reference to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(float f)
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Writes the 32-bit floating point number, \a f, to the stream and returns a
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reference to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(double f)
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Writes the 64-bit floating point number, \a f, to the stream and returns a
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reference to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(const char *s)
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Writes the '\0'-terminated string, \a s, to the stream and returns a
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reference to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(const QString &s)
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Writes the string, \a s, to the stream and returns a reference to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(const QStringRef &s)
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Writes the string reference, \a s, to the stream and returns a reference to
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the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(const QLatin1String &s)
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Writes the Latin1-encoded string, \a s, to the stream and returns a reference
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to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(const QByteArray &b)
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Writes the byte array, \a b, to the stream and returns a reference to the
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stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(const void *p)
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Writes a pointer, \a p, to the stream and returns a reference to the stream.
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*/
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/*!
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\fn QDebug &QDebug::operator<<(QTextStreamFunction f)
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\internal
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*/
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/*!
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\fn QDebug &QDebug::operator<<(QTextStreamManipulator m)
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\internal
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*/
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