To help you to get a feeling for what I mean, try this uncompleted(!) codefilter, which is only a hack(!) under construction ...

XSigils.pm

#!/usr/bin/perl

sub ar2list ($) {
    return @{ $_[0] };
}

sub push_aref ($@) {
    CORE::push( @{+shift} , @_ );
}

package XSigils;

use Filter::Simple;



FILTER {
    warn "\n\n\n --- Before Transformation: \n$_";
    s{ push (\s|\() (\s*) €}
     {push_aref$1$2€}xg;
    s{ \@ \s* €}
     {ar2list €}xg; # 2array
    s{ €(\w+)\[ }
     {\$$1->\[}xg;   # dereference
    s{ €(\w+) }
     {\$$1}xg;       # simple scalar
    warn "\n\n\n --- After Transformation: \n$_";
    warn "\n\n\n --- Code execution!\n";
};

1;

[download]
tstXSigils.pl
#!/usr/bin/perl

use XSigils;

$\="\n";

€arr=[1..3];

push €arr,4,5;

print @€arr;

[download]
OUTPUT
--- Before Transformation: 

$\="\n";

€arr=[1..3];

push €arr,4,5;

print @€arr; # (*)



 --- After Transformation: 

$\="\n";

$arr=[1..3];

push_aref $arr,4,5;

print ar2list $arr;



 --- Code execution!
12345

[download]

Cheers Rolf

UPDATE: (*) of course that's more complicated than print @arr, but I wonder how perl6 intends to handle this case ... ?

In reply to Extended Sigils: Demonstration Of Concept by LanX
in thread Five Features Perl 5 Needs Now by Arunbear

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