I ended up changing it as little as possible and testing it with https://regex101.com <https://regex101.com/>. I’m getting the distinct impression that if I went beyond that I’d risk shooting myself in the foot. ;)
> On 6 May 2018, at 06:19, Tiger12506 <[email protected]> wrote: > > No, '?' also means zero-or-one in RegEx syntax, it's just that it *also* > happens to mean "make the previous quantity modifier non-greedy" if there is > a previous quantity modifier. Notice the double-question mark regex in the > documentation quote previously pasted. That one means make the zero-or-one > quantifier non-greedy. > > On 5/5/2018 5:58 PM, Jeff Young wrote: >> Ahhh… I’m mixing up XPath and RegEx syntax. ‘?’ is zero-or-one in XPath, >> not RegEx. >> >> Thanks Shiv & Thomas. >> >> Cheers, >> Jeff >> >> >>> On 5 May 2018, at 15:37, Shivpratap Chauhan <[email protected] >>> <mailto:[email protected]>> wrote: >>> >>> According to documentation at >>> http://docs.wxwidgets.org/3.0/overview_resyntax.html >>> <http://docs.wxwidgets.org/3.0/overview_resyntax.html> >>> >>> *? +? ?? {m}? {m,}? {m,n}? Non-greedy quantifiers, which match the same >>> possibilities, but prefer the smallest number rather than the largest >>> number of matches (see Matching >>> <http://docs.wxwidgets.org/3.0/overview_resyntax.html#overview_resyntax_matching>). >>> There seems to be difference greedy vs non-greedy quantifiers! >>> >>> >>> Thanks, >>> Shiv >>> >>> >>> >>> On Sat, May 5, 2018 at 6:49 PM, Jeff Young <[email protected] >>> <mailto:[email protected]>> wrote: >>> We have a couple of regular expressions of the form: >>> >>> wxRegEx re( ".*?\\$\\{(.+?)\\}.*?", wxRE_ADVANCED ); >>> >>> Now perhaps I’m too old to remember this stuff correctly, but .*? is >>> redundant, isn’t it? >>> >>> And shouldn’t .+? just be .*? (And for that matter, shouldn’t it really be >>> [^}]*?) >>> >>> Thanks, >>> Jeff. >>> >>> >>> Note that I’m looking at this because it needs to check for both ${…} and >>> $(…) formatted envvars, which I think boils down to: >>> >>> .*(\\$\\{([^}]*)\\})|(\\$\\(([^)]*)\\)).* >>> >>> _______________________________________________ >>> Mailing list: https://launchpad.net/~kicad-developers >>> <https://launchpad.net/~kicad-developers> >>> Post to : [email protected] >>> <mailto:[email protected]> >>> Unsubscribe : https://launchpad.net/~kicad-developers >>> <https://launchpad.net/~kicad-developers> >>> More help : https://help.launchpad.net/ListHelp >>> <https://help.launchpad.net/ListHelp> >>> >>> >> >> >> >> _______________________________________________ >> Mailing list: https://launchpad.net/~kicad-developers >> <https://launchpad.net/~kicad-developers> >> Post to : [email protected] >> <mailto:[email protected]> >> Unsubscribe : https://launchpad.net/~kicad-developers >> <https://launchpad.net/~kicad-developers> >> More help : https://help.launchpad.net/ListHelp >> <https://help.launchpad.net/ListHelp> > _______________________________________________ > Mailing list: https://launchpad.net/~kicad-developers > Post to : [email protected] > Unsubscribe : https://launchpad.net/~kicad-developers > More help : https://help.launchpad.net/ListHelp
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