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qtdeprecationmarkers.qdoc
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// Copyright (C) 2022 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
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/*!
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\headerfile <QtDeprecationMarkers>
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\inmodule QtCore
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\title Qt Deprecation Macros
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\brief The <QtDeprecationMarkers> header file contains deprecation helper macros.
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The header file declares several macros for disabling deprecated Qt APIs
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and enabling/disabling compiler warnings when they are used.
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*/
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/*!
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\macro QT_DISABLE_DEPRECATED_BEFORE
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\relates <QtDeprecationMarkers>
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\deprecated [6.5] Use QT_DISABLE_DEPRECATED_UP_TO instead
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\sa QT_DISABLE_DEPRECATED_UP_TO
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*/
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/*!
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\macro QT_DISABLE_DEPRECATED_UP_TO
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\relates <QtDeprecationMarkers>
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This macro can be defined in the project file to disable functions
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deprecated in a specified version of Qt or any earlier version. The default
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version number is 5.0, meaning that functions deprecated in or before
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Qt 5.0 will not be included.
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For instance, when preparing to upgrade to Qt 6.3, after eliminating all
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deprecation warnings, you can set \c{QT_DISABLE_DEPRECATED_UP_TO=0x060300}
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to exclude from your builds the Qt APIs you no longer use. In your own
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project's build configuration, this will ensure that anyone adding new calls
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to the deprecated APIs will know about it right away. If you also build Qt
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for yourself, including this define in your build configuration for Qt will
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make your binaries smaller by leaving out even the implementation of the
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deprecated APIs.
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\note In order to avoid linker errors, the same deprecation level should be
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used consistently in the entire binary. This means that in static builds
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the Qt libraries should also be built with \c {QT_DISABLE_DEPRECATED_UP_TO}
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set to the same version as in the user code. That is because in static
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build the Qt libraries also become a part of the binary.
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\sa QT_DEPRECATED_WARNINGS, QT_WARN_DEPRECATED_UP_TO
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*/
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/*!
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\macro QT_WARN_DEPRECATED_UP_TO
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\relates <QtDeprecationMarkers>
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This macro can be defined in the project file to disable deprecation
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warnings introduced in Qt versions higher than the specified version.
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For instance, when preparing to upgrade to Qt 6.10, if you are not
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ready to deal with every single deprecation warnings, you can set
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\c{QT_WARN_DEPRECATED_UP_TO=0x060900} to limit the deprecation
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warnings to those in 6.9 and earlier.
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\sa QT_DISABLE_DEPRECATED_UP_TO, QT_NO_DEPRECATED_WARNINGS
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*/
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/*!
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\macro QT_DEPRECATED_WARNINGS
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\relates <QtDeprecationMarkers>
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Since Qt 5.13, this macro has no effect. In Qt 5.12 and before, if this macro
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is defined, the compiler will generate warnings if any API declared as
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deprecated by Qt is used.
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\sa QT_DISABLE_DEPRECATED_UP_TO, QT_NO_DEPRECATED_WARNINGS, QT_WARN_DEPRECATED_UP_TO
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*/
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/*!
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\macro QT_NO_DEPRECATED_WARNINGS
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\relates <QtDeprecationMarkers>
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\since 5.13
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This macro can be used to suppress deprecation warnings that would otherwise
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be generated when using deprecated APIs.
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\sa QT_DISABLE_DEPRECATED_UP_TO, QT_WARN_DEPRECATED_UP_TO
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*/
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