hello David, 

> A Perl 6 equivalent is:
>     token gecos { <- [':']>* }

thanks for those explainations. jnthn gave those yesterday on the 
friendly #perl6 freenode channel and i have to admit i'm not confortable
with the backtracking part.

Anyway: i got the syntax thing and finished the program. thanks

Marc Chantreux (eiro on github and freenode)
"Don't believe everything you read on the Internet"
    -- Abraham Lincoln

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