[Haskell-cafe] checking regular expressions

Alfonso Acosta alfonso.acosta at gmail.com
Thu Nov 8 11:02:04 EST 2007

You don't need IO. Just need to use the (=~) operator (which can be
confusing due to it's polymorphism).

Take a look at http://www.serpentine.com/blog/2007/02/27/a-haskell-regular-expression-tutorial/
for didactive examples.

On Nov 8, 2007 4:21 PM, Uwe Schmidt <uwe at fh-wedel.de> wrote:
> Hi all,
> what's the simplest way to check, whether a given string
> is a wellformed regular expression?
> In the API there's just a "mkRegex" which does not make
> any checks, and the "matchRegex" which throws an exception
> when the regex isn't wellformed.
> So do I need the IO monad for checking a regex?
> Uwe
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