My point is that I am reading in name/value pairs and once I know the name, I know the type of the value, but I don't want to have to pass that information programatically to the point in the code where I am doing the read.
-Alex- On Mon, 12 Apr 2004, Sven Panne wrote: > S. Alexander Jacobson wrote: > > I want to read strings that look like "2" or > > "hello" into values of type Integer or String. > > The problem is that read requires that strings be > > read as "\"hello\"". Is there a way either to > > convince read to not require wrapping quotation > > marks or, alternetively, to catch a read > > exception, and do something sane? > > "reads" is probably what you are looking for: > > Prelude> (reads :: ReadS Integer) "" > [] > Prelude> (reads :: ReadS Integer) "a" > [] > Prelude> (reads :: ReadS Integer) "2" > [(2,"")] > Prelude> (reads :: ReadS Integer) "123blah" > [(123,"blah")] > > And reading a string the way you want is best done by "id". :-) > > Cheers, > S. > _________________________________________________________________ S. Alexander Jacobson mailto:[EMAIL PROTECTED] tel:917-770-6565 http://alexjacobson.com _______________________________________________ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
