[Txr-users] Experimental: horizontal functions.

[Kaz Kylheku]

Hi all,

New feature in repository: horizontal matching functions.

If you write a function like this

 @(define fun (x y))material here@(end)

It is a horizontal function, which is useful for character-oriented 
extraction across a line.


Simple example: function that extract a sequence of digits:

 @(define num (out))@{out /[0-9]/+}@(end)

Now use it:

 Age: @(num age)

"Age: " is matched, then (num age) matches a number, and binds it to 
age.



Recursion works, check out how TXR cleans up the bracket matching 
task:

http://rosettacode.org/wiki/Balanced_brackets#TXR


Cheers ...