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QString: improve lastIndexOf(QRegularExpression) docs

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Due to how regex matching works, lastIndexOf has to be implemented
by matching from the string's beginning until the from position
is reached. This might not be obvious for users, so document that.

Task-number: QTBUG-89050
Change-Id: I4b69ea753e7d417d980031926f1e01d77e58720d
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 6f2dc8d7f27419d13bfbb2af272af99c03c66562)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
This commit is contained in:
Giuseppe D'Angelo 2020-12-07 01:40:54 +01:00 committed by Qt Cherry-pick Bot
parent afcb2bb248
commit f19d84f048
1 changed files with 4 additions and 0 deletions
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src/corelib/text/qstring.cpp
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@ -4251,6 +4251,10 @@ qsizetype QString::indexOf(const QRegularExpression &re, qsizetype from, QRegula
Example:
\snippet qstring/main.cpp 94
\note Due to how the regular expression matching algorithm works,
this function will actually match repeatedly from the beginning of
the string until the position \a from is reached.
*/
qsizetype QString::lastIndexOf(const QRegularExpression &re, qsizetype from, QRegularExpressionMatch *rmatch) const
{