On 01/09/13 07:02, yi lu wrote:
I want to know if it is possible that I use strings without "".
If I type *Prelude>foo bar* which actually I mean *Prelude>foo "bar"* However I don't want to type ""s.
I have noticed if *bar* is predefined or it is a number, it can be used as arguments. But can other strings be used this way? Like in bash, we can use *ping 127.0.0.1* where *127.0.0.1* is an argument.
If not, can *foo* be defined as a function so that it recognize arguments like *bar* as *"bar"*?
Thanks, Yi Lu
You can't do this non-trivially. I think your only bet would be Template Haskell using the second approach and even then, it's a huge, huge stretch. I highly recommend against such ideas though. Do you really want anything that's not bound to be treated as a String? (The answer is ‘no’). I suggest that you get used to ‘"’s. If you have deep hatred for ‘"’, you could resort to spelling out the strings like ['f', 'o', 'o'] or even 'f':'o':'o':[]. It's a bit like asking whether you can do addition everywhere by just typing the numbers to each other (no cheating and defining number literals as functions ;) ). -- Mateusz K.