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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Creator documentation.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Free Documentation License Usage
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of
** this file. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
**
****************************************************************************/
/*!
//! [qtcreator variables]
\section1 Using Qt Creator Variables
You can use \QC variables in arguments, executable paths, and working
directories. The variables take care of quoting their expansions, so you do
not need to put them in quotes.
Select the \inlineimage icons/replace.png
(\uicontrol {Variables}) button in a field to select from a list of
variables that are available in a particular context.
For more information about each variable, move the cursor over it in the
list.
\image qtcreator-variables.png "Qt Creator Variables dialog displaying a tooltip"
The following syntax enables you to use environment variables as \QC
variables: %{Env:VARNAME}.
\QC uses pattern substitution when expanding variable names. To replace the
first match of \e pattern within \e variable with \e replacement, use:
\badcode
%{variable/pattern/replacement}
\endcode
To replace all matches of \e pattern within \e variable with \e replacement,
use:
\badcode
%{variable//pattern/replacement}
\endcode
The pattern can be a regular expression and the replacement can contain
backreferences. For example, if \c %{variable} is \c my123var, then
\c %{variable/(..)(\d+)/\2\1} is expanded to \c {123myvar}.
Instead of the forward slash, you can also use the pound sign (\c #) as
the substitution character. This can be helpful if the value is supposed
to be a file path, in which case forward slashes might get translated
to backslashes on Windows hosts.
To use the default value if the variable is not set, use:
\badcode
%{variable:-default}
\endcode
//! [qtcreator variables]
*/
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