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Postings from September 2011
Rafael Garcia-Suarez wrote:
>So, if I understand that last paragraph, that implies new syntax ?
Depends what you count as new syntax. Certainly some new semantics,
including new builtin functions, but we don't need to add to perly.y.
I imagine something like
$pkg = package_metaobject("Foo::Bar");
# or: $pkg = new_anon_package();
$obj = $pkg->new(); # unambiguously call class method
$obj = bless({}, $pkg); # only way to bless into anon package
$pkg = ref_metaobject($obj); # only for blessed objects
use strict_packages;
$obj = Foo::Bar->new(); # error
Obvious sources of trouble:
$pkg = package_metaobject("Foo::Bar");
bless($pkg, "Heh::Heh");
$obj = $pkg->new; # Foo::Bar->new or Heh::Heh->new?
sub new {
# current idiom, breaks if $_[0] is a package metaobject
my $class = ref($_[0]) || $_[0];
}
$pkg = new_anon_package();
$obj = bless({}, $pkg);
$class = ref($pkg); # surprising metaobject or useless string?
So we need some non-trivial thought about how the semantics will fit
together. I'm determined that we won't get the kind of ill-thought-out
mess we've so often had before.
-zefram
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