diff options
Diffstat (limited to 'src/corelib/tools/qregularexpression.cpp')
| -rw-r--r-- | src/corelib/tools/qregularexpression.cpp | 29 |
1 files changed, 4 insertions, 25 deletions
diff --git a/src/corelib/tools/qregularexpression.cpp b/src/corelib/tools/qregularexpression.cpp index 9c201e770b..17acd476b2 100644 --- a/src/corelib/tools/qregularexpression.cpp +++ b/src/corelib/tools/qregularexpression.cpp @@ -460,34 +460,13 @@ QT_BEGIN_NAMESPACE \row \li \c{"[a-z]+\\d+"} \li \b true \li \b true \endtable - Exact matching is not reflected in QRegularExpression. If you want to be - sure that the subject string matches the regular expression exactly, you can wrap the - pattern between a couple of anchoring expressions. Simply - putting the pattern between the \c{^} and the \c{$} anchors is enough - in most cases: + Exact matching is not reflected in QRegularExpression. If you want + to be sure that the subject string matches the regular expression + exactly, you can wrap the pattern using the anchoredPattern() + function: \snippet code/src_corelib_tools_qregularexpression.cpp 24 - However, remember that the \c{$} anchor not only matches at the end of the - string, but also at a newline character right before the end of the string; - that is, the previous pattern matches against the string "this pattern must - match exactly\\n". Also, the behaviour of both the \c{^} and the \c{$} - anchors changes if the MultiLineOption is set either explicitly (as a - pattern option) or implicitly (as a directive inside the pattern string). - - Therefore, in the most general case, you should wrap the pattern between - the \c{\A} and the \c{\z} anchors: - - \snippet code/src_corelib_tools_qregularexpression.cpp 25 - - Note the usage of the non-capturing group in order to preserve the meaning - of the branch operator inside the pattern. - - The QRegularExpression::anchoredPattern() helper method does exactly that for - you. - - \sa anchoredPattern - \section3 Porting from QRegExp's Partial Matching When using QRegExp::exactMatch(), if an exact match was not found, one |