Thank you Matthew & Shriram. I would actually prefer for booleans to be within S-expression. It seems to be a lot more intuitive for my current students to have observers to test for a boolean S-expr and to extract a (Racket) boolean value from an S-expression.
Cheers, Marco On Thu, Jan 16, 2014 at 3:30 PM, Matthew Flatt <[email protected]> wrote: > We always spelled it out as `true` and `false` (and, yes, you have to > check for those before parsing other identifiers). > > I wouldn't mind allowing booleans within S-expression, though, if you'd > like me to add it. > > At Thu, 16 Jan 2014 15:26:11 -0500, Marco Morazan wrote: > > Dear All, > > > > In plai-typed, an S-expression cannot be a boolean, correct? How can I > > parse a boolean? The idea here is to construct a boolean expression when > a > > boolean is encountered in the input/ > > > > -- > > > > Cheers, > > > > Marco > > > > Have a´¨) > > ¸.·´¸.·*´¨) ¸.·*¨) > > (¸.·´ (¸.·´ * wonderful day! :) > > ____________________ > > Racket Users list: > > http://lists.racket-lang.org/users > -- Cheers, Marco Have a´¨) ¸.·´¸.·*´¨) ¸.·*¨) (¸.·´ (¸.·´ * wonderful day! :)
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