package Moose::Meta::Method::Accessor::Native::Hash::set;
our $VERSION = '2.2015';

use strict;
use warnings;

use List::Util 1.32;
use Moose::Role;

with 'Moose::Meta::Method::Accessor::Native::Hash::Writer';

sub _minimum_arguments { 2 }

sub _maximum_arguments { undef }

around _inline_check_argument_count => sub {
    my $orig = shift;
    my $self = shift;

    return (
        $self->$orig(@_),
        'if (@_ % 2) {',
            $self->_inline_throw_exception( MustPassEvenNumberOfArguments =>
                                            "method_name => '".$self->delegate_to_method."',".
                                            'args        => \@_',
            ) . ';',
        '}',
    );
};

sub _inline_process_arguments {
    my $self = shift;

    return (
        'my @keys_idx = grep { ! ($_ % 2) } 0..$#_;',
        'my @values_idx = grep { $_ % 2 } 0..$#_;',
    );
}

sub _inline_check_arguments {
    my $self = shift;

    return (
        'for (@keys_idx) {',
            'if (!defined($_[$_])) {',
                $self->_inline_throw_exception( UndefinedHashKeysPassedToMethod =>
                                                'hash_keys                       => \@keys_idx,'.
                                                "method_name                     => '".$self->delegate_to_method."'",
                ) . ';',
            '}',
        '}',
    );
}

sub _adds_members { 1 }

# We need to override this because while @_ can be written to, we cannot write
# directly to $_[1].
sub _inline_coerce_new_values {
    my $self = shift;

    return unless $self->associated_attribute->should_coerce;

    return unless $self->_tc_member_type_can_coerce;

    # Is there a simpler way to do this?
    return (
        '@_ = List::Util::pairmap { $a => $member_coercion->($b) } @_;',
    );
};

sub _potential_value {
    my $self = shift;
    my ($slot_access) = @_;

    return '{ %{ (' . $slot_access . ') }, @_ }';
}

sub _new_members { '@_[ @values_idx ]' }

sub _inline_optimized_set_new_value {
    my $self = shift;
    my ($inv, $new, $slot_access) = @_;

    return '@{ (' . $slot_access . ') }{ @_[@keys_idx] } = @_[@values_idx];';
}

sub _return_value {
    my $self = shift;
    my ($slot_access) = @_;

    return 'wantarray '
             . '? @{ (' . $slot_access . ') }{ @_[@keys_idx] } '
             . ': ' . $slot_access . '->{ $_[$keys_idx[0]] }';
}

no Moose::Role;

1;
