kicad-developers team mailing list archive

[Jeff Young <jeff@xxxxxxxxx>]

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 <shivmsit@xxxxxxxxx> 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 <jeff@xxxxxxxxx <mailto:jeff@xxxxxxxxx>> 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     : kicad-developers@xxxxxxxxxxxxxxxxxxx <mailto:kicad-developers@xxxxxxxxxxxxxxxxxxx>
> Unsubscribe : https://launchpad.net/~kicad-developers <https://launchpad.net/~kicad-developers>
> More help   : https://help.launchpad.net/ListHelp <https://help.launchpad.net/ListHelp>
> 
>