| Name : perl-Perl6-Placeholders
| |
| Version : 0.07
| Vendor : obs://build_opensuse_org/devel:languages:perl
|
| Release : lp155.7.1
| Date : 2023-07-20 18:23:52
|
| Group : Development/Libraries/Perl
| Source RPM : perl-Perl6-Placeholders-0.07-lp155.7.1.src.rpm
|
| Size : 0.01 MB
| |
| Packager : https://www_suse_com/
| |
| Summary : Perl 6 implicitly declared parameters for Perl 5
|
Description :
The Perl6::Placeholders module lets you try out the new Perl 6 implicit
parameter specification syntax in Perl 5.
Perl 6 reserves all variables of the form \'$^name\' or \'AATT^name\' or \'%^name\'
as \"placeholders\" that can be used to turn regular blocks into subroutine
references.
Any block containing one or more such placeholders is treated as a
reference to a subroutine in which the placeholders are replaced by the
appropriate number and sequence of arguments.
That is, the expression:
$check = { $^a == $^b**2 * $^c or die $^err_msg };
is equivalent to:
$check = sub ($a, $b, $c, $err_msg) {
$a == $b**2 * $c or die $err_msg
};
This could then be invoked:
$check.($i,$j,$k,$msg);
It is also be possible to interpolate an argument list into a static
expression like so:
{ $^a == $^b**2 * $^c or die $^err_msg }.($i,$j,$k,$msg);
The placeholders are sorted UTF8-abetically before they are used to create
the subroutine\'s parameter list. Hence the following:
AATTreverse_sorted = sort {$^b < => $^a} AATTlist;
works as expected. That is, it\'s equivalent to:
AATTreverse_sorted = sort sub($a,$b){$b < => $a}, AATTlist;
|
RPM found in directory: /packages/linux-pbone/ftp5.gwdg.de/pub/opensuse/repositories/devel:/languages:/perl:/CPAN-P/15.5/noarch |
