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Should AutoHotkey have a RegEx-match operator?
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polyethene
PostPosted: December 17th, 2007, 9:41 pm 
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This follows on from John B.'s topic titled "Could Loop, Filepattern use regular expressions?."
We should have a new regex equality operator for string matching without calling functions, e.g.

Code:
if (var ~= "[\d\.+\-]")
   MsgBox, input cannot contain numbers

vtype := (var ~= "i)^0x[a-f\d]{1,16}$" ? "hex" : "NaN")

The existing RegExMatch and RegExReplace functions can be left in for additional features. This will simplify many of the tasks AutoHotkey was designed for.

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Tuncay
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PostPosted: December 17th, 2007, 9:56 pm 
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I voted for yes, we should have.

Without calling the regexmatch function, that could speed up. Return should be just 0 or 1, like any other equality.

edit: How about ErrorLevel to use as UnquotedOutputVar?


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polyethene
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PostPosted: December 17th, 2007, 10:45 pm 
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Tuncay wrote:
How about ErrorLevel to use as UnquotedOutputVar?
Some would argue that ErrorLevel be reserved only for commands and functions, but I wouldn't mind. I'm glad you mentioned performance, this operator could serve as a non-cached and non-capturing super fast alternative to RegExMatch().

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engunneer
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PostPosted: December 18th, 2007, 12:27 am 
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I would say it should still return FoundPos, since that matches some of the other functions in AHK. I don't think it will be bad for performance. (Kind of like WinExist actually returns a handle)

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majkinetor
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PostPosted: December 18th, 2007, 9:38 am 
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Must have. Thumbs up.

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Tuncay
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PostPosted: December 18th, 2007, 9:37 pm 
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If ErrorLevel would be used, then returning FoundPos is not needed that much. But, without ErrorLevel, I am also returning for FoundPos.
Code:
If x ~= \d\d:\d\d
  MsgBox %ErrorLevel%

How simpler could this be?

The equivalent currently is
Code:
If RegExMatch(x, "\d\d:\d\d", OutputVar)
  MsgBox "%OutputVar%"


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tic
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PostPosted: December 19th, 2007, 8:26 pm 
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I completely agree. hadnt thought of this, but now you mention it, it seems like a great idea.

btw....

I think RegexReplace also needs to have a variable for foundpos badly! its so annoying using regexmatch as well just to tell regexreplace where to search from!


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AHKnow
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PostPosted: December 20th, 2007, 3:15 am 
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Posts: 121
Great request, however Perl is probably not the best example of a language to follow. Looking at Perl for too long can cause you to go insane.


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majkinetor
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PostPosted: December 20th, 2007, 12:09 pm 
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LOL

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polyethene
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PostPosted: December 27th, 2007, 3:23 pm 
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I never liked perl much anyway, but Ecmascript (javascript) also supports regex as objects.

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