hello people,
short question: how to use $*ARGFILES in a MAIN function?
context:
as an exercice as well as demo, i reimplement unix filters
(cat, grep, wc, join, paste, ...). Basic wc could be
multi sub MAIN ( :$l ) { say +lines }
multi sub MAIN ( :$c ) { say [+] lines>>.chars }
multi sub MAIN ( :$w ) { say [+] lines.map: +*.words }
now i want grep that can have both -H (head the line with the filename)
and the -n (add the number of the line). my 'almost working' attempt was
but it takes the flags as signatures.
sub MAIN ( Str $pattern, :$H = False , :$n = False , *@rest ) {
(IO::ArgFiles.new: @rest).lines>>.say
}
any help on it?
extra note: i use the perl6 shipped with guix so:
perl6 -v
This is Rakudo version 2019.03.1 built on MoarVM version 2019.03
implementing Perl 6.d.
regards
marc
