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use 5.014;
use strict;
use warnings;
package Kavorka::TraitFor::Sub::fresh;
our $AUTHORITY = 'cpan:TOBYINK';
our $VERSION = '0.036';
use Moo::Role;
use Types::Standard qw(Any);
use Sub::Util ();
use Carp qw(croak);
use namespace::sweep;
my $stash_name = sub {
Sub::Util::subname($_[0]) =~ m/^(.+)::(.+?)$/ ? $1 : undef;
};
before install_sub => sub
{
my $self = shift;
croak("The 'fresh' trait cannot be applied to lexical methods")
if $self->is_lexical;
croak("The 'fresh' trait cannot be applied to anonymous methods")
if $self->is_anonymous;
croak("The 'fresh' trait may only be applied to methods")
if $self->invocation_style ne 'method';
my ($pkg, $name) = ($self->qualified_name =~ /^(.+)::(\w+)$/);
my $existing = $pkg->can($name) or return;
my $existing_source = $stash_name->($existing);
if ($pkg->isa($existing_source) or $existing_source eq 'UNIVERSAL')
{
croak("Method '$name' is inherited from '$existing_source'; not fresh");
}
if ($pkg->DOES($existing_source))
{
croak("Method '$name' is provided by role '$existing_source'; not fresh");
}
croak("Method '$name' already exists in inheritance hierarchy; possible namespace pollution; not fresh");
};
1;
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