[Haskell-cafe] why no replace function in our regular expression libs ?
People have put a lot of work into regular expression libraries on haskell. Yet it seems very few of them provide a replace/substitute function - just regex-compat and regepr as far as I know. Why is that ? #haskell says: sclv iirc its because that's a really mutatey operation in the underlying c libs sclv should be simple enough to write a general purpose wrapper layer that uses captures to create the effect Secondly, as of today what do y'all do when you need that functionality ? -Simon ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] why no replace function in our regular expression libs ?
I've needed this recently, too. End result: I wrote an Attoparsec.Parser Text, and ran the text through that. A regex would have been much nicer... - Clark On Fri, Jan 25, 2013 at 2:06 PM, Simon Michael si...@joyful.com wrote: People have put a lot of work into regular expression libraries on haskell. Yet it seems very few of them provide a replace/substitute function - just regex-compat and regepr as far as I know. Why is that ? #haskell says: sclv iirc its because that's a really mutatey operation in the underlying c libs sclv should be simple enough to write a general purpose wrapper layer that uses captures to create the effect Secondly, as of today what do y'all do when you need that functionality ? -Simon ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
Re: [Haskell-cafe] why no replace function in our regular expression libs ?
On 13-01-25 02:06 PM, Simon Michael wrote: People have put a lot of work into regular expression libraries on haskell. Yet it seems very few of them provide a replace/substitute function - just regex-compat and regepr as far as I know. Why is that ? [...] Secondly, as of today what do y'all do when you need that functionality I can only speak for myself, why I do not miss regex substitution too much. Sometimes, regex substitution is exactly the solution, and I use it. But the whole job is easily done in a shell script, or even in an editor. So I don't use regex substitution in Haskell in this case. Sometimes, the substitution job is: transform this article titlecodeMonad/code Tutorial/title content.../content /article to this !DOCTYPE html etc etc html headtitleMonad Tutorial/title/head body h1codeMonad/code Tutorial/h1 ... /body /html In this job, if a regex solution exists, I don't want to know. I just use HXT or XSLT. Sometimes, regex substitution plus Haskell is exactly the solution. Then I use regex-compat. It works. One solution is enough. I don't need a hundred choices for regex, or a hundred choices for Int. ___ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
