[clazy] [Bug 385544] New: Validate regular expressions passed to QRegExp and QRegularExpression

[Thomas Fischer]

https://bugs.kde.org/show_bug.cgi?id=385544

            Bug ID: 385544
           Summary: Validate regular expressions passed to QRegExp and
                    QRegularExpression
           Product: clazy
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: fischer at unix-ag.uni-kl.de
                CC: smartins at kde.org
  Target Milestone: ---

It would be nice if clazy could validate regular expressions passed in text
form to QRegExp or QRegularExpression.
This should be either done by trying to parse/compile the regular expression
passed to either class or by checking the passed regular expression for common
mistakes (see examples below) based on context-sensitive text patterns rather
than compiling the expression.

Example for which clazy should warn (passing raw char* to constructors to keep
examples brief):
QRegularExpression("\bA"); // should be \\bA
QRegExp("v\\d([.]\\d)*)"); // mismatching parentheses

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