# Copyright (C) 2011, Parrot Foundation.

=head1 NAME

docs/deprecations/deprecations_3_6.pod - Parrot Deprecations for 3.6

=head1 Parrot Deprecations for 3.6

=head2 Special Purpose NCI Parameter Types

The NCI parameter types 'J', '@', 't', '0', 'V', '2', '3', '4', 'B', 'b', 'L',
and 'T' have been removed.

=head3 Rationale

These types are special-purpose and their function can be accomplished by other
means.

=head3 Replacement

=head4 B<'J', '@', 't', '0'>

These types accomplish tasks which can be accomplished from PIR and are
therefore redundant

=over 4

=item 'J'

getinterp + pointer NCI types

=item '@'

slurpy param on a wrapping PIR sub

=item 't'

manual lifetime management of C string buffer through NCI access to
Parrot_str_to_cstring() and Parrot_str_free_cstring()

=item '0'

null + pointer NCI type

=back

=head4 B<'V', '2', '3', '4', 'B'>

A less type-specific pass-by-reference mechanism is available.

See the bindings for pcre_compile() in runtime/parrot/library/pcre.pir
for an example of its use.

=head4 B<'b', 'L', 'T'>

These were poorly documented and were broken in their implementation.
No replacement has been provided as these do not represent desirable behaviour.

=cut