On 2020-01-05 14:32, David Santiago wrote:
Hello.
I'm following https://docs.raku.org/language/5to6-nutshell#Getopt::Long
but i still haven't figured it out how do i use a constraint in a
named parameter when processing a command line.
I have this piece of code:
multi sub MAIN("apt",
:$layout where $layout ~~
/^<[12345]>\+[kk|1]$|^6\+$|^[studio|unusual]$/ #= Apartment layout.
Values accepted: 1+kk,2+kk,...,5+kk, 6+, studio, unusual
) {
say "Enter";
}
however when i run it i get the --help message:
$ raku script.raku apt --layout '1+kk'
Usage:
script.raku [--layout=<Any where { ... }>] apartment
--layout=<Any where { ... }> Apartment layout. Values accepted:
1+kk,2+kk,...,5+kk, 6+, studio, unusual
If i make layout a positional parameter then it works correctly. Is
there a way to make this work with a named parameter?
And how do i make possible to use the "--layout" option several times?
Changing the parameter from $layout to @layout doesn't work.
Best regards,
David Santiago
Hi David,
This is probably not going to help, by maybe there
will be something in it that will help.
-T
<perl6.command.line.parcing.values.txt>
perl 6: How to parce values from the command line
References:
https://stackoverflow.com/questions/59112680/perl6-how-do-i-read-mixed-parameters-from-the-command-line
https://modules.raku.org/dist/Getopt::Long:cpan:LEONT
https://stackoverflow.com/questions/57041053/main-subroutine
https://docs.raku.org/language/create-cli#index-entry-MAIN
If you are only interested in parameters with a single dash, you'll need
GetOpt::Long
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Here is an example using Getopt::Long:
use v6;
use Getopt::Long;
my %opt = help => 0, 'r=s' => "", 'q=s' => "", "w=s" => "";
my %options = get-options(%opt).hash;
say %options;
Example run:
$ p.p6 -w xyz -q def -r abc
{help => 0, q => def, r => abc, w => xyz}
----------------------------------
Here is an example using Getopt::Long:
use v6;
use Getopt::Long;
my %opt = help => 0, 'r=s' => "", 'q=s' => "", 'w=s' => "";
my %options = get-options(%opt).hash;
say %options;
say @*ARGS;
Example run:
$ p.p6 -w xyz -q def -r abc hello
{help => 0, q => def, r => abc, w => xyz}
[hello]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Use the MAIN sub:
#!/usr/bin/env raku
use v6;
sub MAIN(:$these ="These", :$are="Are", :$params="Params") {
say "$these $are $params";
}
You can type these parameters in any order:
./command-line.p6 --are=well --these=those
those well Params
And will also catch any extra parameter, showing you the actual parameters:
./command-line.p6 --are=well --these=those --not=this_one
Usage:
./command-line.p6 [--these=<Any>] [--are=<Any>] [--params=<Any>]
If you are only interested in parameters with a single dash, you'll need
GetOpt::Long
</perl6.command.line.parcing.values.txt>
