| Name : perl-Safe-Isa
| |
| Version : 1.000010
| Vendor : obs://build_opensuse_org/devel:languages:perl
|
| Release : lp155.16.3
| Date : 2023-05-17 15:15:26
|
| Group : Development/Libraries/Perl
| Source RPM : perl-Safe-Isa-1.000010-lp155.16.3.src.rpm
|
| Size : 0.01 MB
| |
| Packager : https://www_suse_com/
| |
| Summary : Call isa, can, does and DOES safely on things that may not be objects
|
Description :
How many times have you found yourself writing:
if ($obj->isa(\'Something\')) {
and then shortly afterwards cursing and changing it to:
if (Scalar::Util::blessed($obj) and $obj->isa(\'Something\')) {
Right. That\'s why this module exists.
Since perl allows us to provide a subroutine reference or a method name to
the -> operator when used as a method call, and a subroutine doesn\'t
require the invocant to actually be an object, we can create safe versions
of isa, can and friends by using a subroutine reference that only tries to
call the method if it\'s used on an object. So:
my $isa_Foo = $maybe_an_object->$_call_if_object(isa => \'Foo\');
is equivalent to
my $isa_Foo = do {
if (Scalar::Util::blessed($maybe_an_object)) {
$maybe_an_object->isa(\'Foo\');
} else {
undef;
}
};
Note that we don\'t handle trying class names, because many things are valid
class names that you might not want to treat as one (like say \"Matt\") - the
\'is_module_name\' function from Module::Runtime is a good way to check for
something you might be able to call methods on if you want to do that.
We are careful to make sure that scalar/list context is preserved for the
method that is eventually called.
|
RPM found in directory: /packages/linux-pbone/ftp5.gwdg.de/pub/opensuse/repositories/devel:/languages:/perl/15.5/noarch |
