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sort keys when populating hashref about p5-universal-object HOT 3 CLOSED

tobyink commented on August 15, 2024

sort keys when populating hashref

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Comments (3)

stevan commented on August 15, 2024

That is annoying, but kind of expected for HASH based instances, don't you think?

How does Moo/Moose handle this?

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tobyink commented on August 15, 2024

Method::Generate::Constructor (part of Moo) uses this to generate the part of the constructor which copies attribute values from the constructor arguments to $new. As you can see, it sorts the keys.

  join '', map {
    my $arg = $test{$_};
    my $arg_key = quotify($arg);
    my $test = defined $arg ? "exists \$args->{$arg_key}" : undef;
    my $source = defined $arg ? "\$args->{$arg_key}" : undef;
    my $attr_spec = $spec->{$_};
    $self->_cap_call($ag->generate_populate_set(
      '$new', $_, $attr_spec, $source, $test, $arg,
    ));
  } sort keys %test;

And Class::MOP::Class uses the following, which again sorts by name.

sub _inline_slot_initializers {
    my $self = shift;

    my $idx = 0;

    return map { $self->_inline_slot_initializer($_, $idx++) }
               sort { $a->name cmp $b->name } $self->get_all_attributes;
}

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stevan commented on August 15, 2024

Okay, fair enough.

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