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47 lines
1.8 KiB
C++
47 lines
1.8 KiB
C++
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// Copyright (C) 2022 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
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/*!
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\macro QT_VERSION_CHECK(major, minor, patch)
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\relates <QtVersionChecks>
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Turns the \a major, \a minor and \a patch numbers of a version into an
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integer that encodes all three. When expressed in hexadecimal, this integer
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is of form \c 0xMMNNPP wherein \c{0xMM ==} \a major, \c{0xNN ==} \a minor,
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and \c{0xPP ==} \a patch. This can be compared with another similarly
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processed version ID.
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Example:
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\snippet code/src_corelib_global_qglobal.cpp qt-version-check
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\note the parameters are read as integers in the normal way, so should
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normally be written in decimal (so a \c 0x prefix must be used if writing
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them in hexadecimal). Thus \c{QT_VERSION_CHECK(5, 15, 0)} is equal to \c
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0x050f00, which could equally be written \c{QT_VERSION_CHECK(5, 0xf, 0)}.
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\sa QT_VERSION
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*/
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/*!
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\macro QT_VERSION
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\relates <QtVersionChecks>
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This macro expands to a numeric value of the same form as \l
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QT_VERSION_CHECK() constructs, that specifies the version of Qt with which
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code using it is compiled. For example, if you compile your application with
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Qt 6.1.2, the QT_VERSION macro will expand to \c 0x060102, the same as
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\c{QT_VERSION_CHECK(6, 1, 2)}. Note that this need not agree with the
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version the application will find itself using at \e runtime.
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You can use QT_VERSION to select the latest Qt features where available
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while falling back to older implementations otherwise. Using
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QT_VERSION_CHECK() for the value to compare with is recommended.
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Example:
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\snippet code/src_corelib_global_qglobal.cpp 16
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\sa QT_VERSION_STR, QT_VERSION_CHECK(), qVersion()
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*/
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