<QForeach> Proxy Page

Macros

Q_FOREACH(variable, container)
Q_FOREVER
foreach(variable, container)
forever

Macro Documentation

Q_FOREACH(variable, container)

Same as foreach(variable, container).

This macro is available even when no_keywords is specified using the .pro file's CONFIG variable.

Note: Since Qt 5.7, the use of this macro is discouraged. It will be removed in a future version of Qt. Please use C++11 range-for, possibly with qAsConst(), as needed.

See also qAsConst().

Q_FOREVER

Same as forever.

This macro is available even when no_keywords is specified using the .pro file's CONFIG variable.

See also foreach().

foreach(variable, container)

This macro is used to implement Qt's foreach loop. The variable parameter is a variable name or variable definition; the container parameter is a Qt container whose value type corresponds to the type of the variable. See The foreach Keyword for details.

If you're worried about namespace pollution, you can disable this macro by adding the following line to your .pro file:

CONFIG += no_keywords

Note: Since Qt 5.7, the use of this macro is discouraged. It will be removed in a future version of Qt. Please use C++11 range-for, possibly with qAsConst(), as needed.

See also qAsConst().

forever

This macro is provided for convenience for writing infinite loops.

Example:

forever {
    ...
}

It is equivalent to for (;;).

If you're worried about namespace pollution, you can disable this macro by adding the following line to your .pro file:

CONFIG += no_keywords

See also Q_FOREVER.

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