Implement exact match expression builder for QRegularExpression

QRegularExpression doesn't offer a direct equivalent of QRegExp's exact
match.

There are several places in the Qt sources that use this feature. This
patch implements a small helper function that builds the expression as
recommended in the documentation and updates the related code.

[ChangeLog][Core][Tools] QRegularExpression now provides
anchoredPattern() which is a helper function to build regular
expressions used for exact matching.

Change-Id: Idbbf142c4c5cb9b62abf8229f4ce85fd4409e5d0
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 2 insertions, 4 deletions

diff --git a/src/widgets/dialogs/qfilesystemmodel.cpp b/src/widgets/dialogs/qfilesystemmodel.cpp
index b67335822b..e4edd2f6ef 100644
--- a/src/widgets/dialogs/qfilesystemmodel.cpp
+++ b/src/widgets/dialogs/qfilesystemmodel.cpp
@@ -2032,10 +2032,8 @@ bool QFileSystemModelPrivate::passNameFilters(const QFileSystemNode *node) const
                                             : QRegularExpression::CaseInsensitiveOption;
 
         for (const auto &nameFilter : nameFilters) {
-            const QString wildcard = QLatin1String("\\A(?:")
-                                     + QRegularExpression::wildcardToRegularExpression(nameFilter)
-                                     + QLatin1String(")\\z");
-            QRegularExpression rx(wildcard, options);
+            const QString wildcard = QRegularExpression::wildcardToRegularExpression(nameFilter);
+            QRegularExpression rx(QRegularExpression::anchoredPattern(wildcard), options);
             QRegularExpressionMatch match = rx.match(node->fileName);
             if (match.hasMatch())
                 return true;