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|
use 5.014;
use strict;
use warnings;
package Kavorka::TraitFor::Parameter::alias;
our $AUTHORITY = 'cpan:TOBYINK';
our $VERSION = '0.036';
use Moo::Role;
use constant HAS_REFALIASING => ($] >= 5.022);
around _injection_assignment => sub
{
my $next = shift;
my $self = shift;
my ($sig, $var, $val) = @_;
if ($self->kind eq 'my')
{
my $format;
if (HAS_REFALIASING) {
$format = <<'EOF';
my %s;
{
use experimental 'refaliasing';
\%s = \do { %s };
};
EOF
return sprintf($format, ($var) x 2, $val);
}
else {
require Data::Alias;
return sprintf('Data::Alias::alias(my %s = do { %s });', $var, $val);
}
}
elsif ($self->kind eq 'our')
{
(my $glob = $var) =~ s/\A./*/;
return sprintf('our %s; local %s = \\do { %s };', $var, $glob, $val);
}
else
{
(my $glob = $var) =~ s/\A./*/;
return sprintf('local %s = \\do { %s };', $glob, $val);
}
};
after sanity_check => sub
{
my $self = shift;
my $traits = $self->traits;
my $name = $self->name;
croak("Parameter $name cannot be an alias and coerce") if $traits->{coerce};
croak("Parameter $name cannot be an alias and a copy") if $traits->{copy};
croak("Parameter $name cannot be an alias and locked") if $traits->{locked};
};
1;
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