=head1 Deprecated opcodes

All are gone. Please read the history of this file for more.

=head1 Deprecated APIs

=over 4

=item * 

All Parrot_char_is_* functions from src/string_primitives.c will
be removed. Please use Parrot_string_is_cclass() instead.

=back

=head1 Deprecated methods

=over 4

=item PGE

PGE::P6Rule is now a registered compiler, and should be used like so:

 <@pmichaud> it's easy; instead of  $P0 = find_global "PGE", "p6rule"   
   one now does  $P0 = compreg "PGE::P6Rule"

This syntax is also true for PGE::Glob and PGE::P5Regexp

=back

=head1 FUTURE changes

Not yet deprecated, but it's recommended to use the new syxtax and
gradually change the old.

=over 4

=item Chip's colon

Subroutine attributes will use the colon syntax:

  .sub foo method, @MULTI(x,y)    => .sub foo :method :multi(x,y)
  .sub foo @ANON, @LOAD           => .sub foo :anon :load

The new syntax uses no comma separators and all sub attributes are lower
case and prefixed by a colon.

=item Class name IDs

... will require a dot in front

  $P0 = new Integer               => $P0 = new .Integer

=item Assignment syntax with opcodes [#36283]

When the first argument of an opcode is C<OUT>, then the assignment syntax
will be allowed, as it is today.

In any other case (i.e. C<INOUT>, C<IN>), this will become
a syntax error. For example:

	$S0 = print
	$P0 = substr 1, 2, "x"

Will have to be:

	print $S0
	substr $P0, 1, 2, "x"

=item Assignment Syntax

Currently, C<=> is used for both assignment and aliasing. Chip says that, 
once this change is in effect, we'll use the following syntax:

   P0 := P1      # aliasing:   P0 and P1 point to same PMC
   P0 := opcode  # aliasing:   P0 points to PMC returned by opcode
   P0 = ...      # assignment: modifies P0, NO MATTER WHAT '...' IS

   S0 := S1      # aliasing:   S0 and S1 point to same header
   S0 := opcode  # aliasing:   S0 points to header returned by opcode
   S0 = ...      # assignment: modifies S0, NO MATTER WHAT '...' IS

   I0 := ...     # ILLEGAL
   I0 = ...      # assignment: modifies I0

   N0 := ...     # ILLEGAL
   N0 = ...      # assignment: modifies N0

=back