On Friday 22 August 2003 13.04, Immanuel Litzroth wrote:
> Has anyone an example of <reg>{n,k} regular expression in Alex 2.0?
> I can not get them to work, alex won't parse them (not the way I write
> them anyway)
> Immanuel
>
Hi,
Here comes a silly example which in any case
works as expected on my linux system with alex and ghc.
file "foo.x" contains:
------------------------------------
{
module Main (main) where
}
%wrapper "basic"
words :-
$white+ ;
A{3,5} { \s -> () }
{
main = do
s <- getContents
print (length (alexScanTokens s))
}
-------------------------------------------
% alex foo.x
% ghc --make foo.hs
% a.out < testfile.txt
Regards Per
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