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]> 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> > >
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