Right way to pass QString to methods

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Platform(s): all

Article

Keywords: Qt, QString

Created: gnuton (20 Jun 2010)

Last edited: hamishwillee (11 Oct 2012)

A common programming mistake is passing QString as value to methods.

void method(const QString str);

This is allowed but it is not so efficient even if QString is implicitly shared .

A more efficient way is passing the const reference instead of the value.

void method(const QString& str);

This is valid also for other objects.

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