/ 
parrot-0.8.1
/ DEPRECATED

Deprecation in Parrot

This is a list of currently deprecated features of Parrot. Every deprecation has an associated RT ticket. Each item indicates the last release it's guaranteed to appear in. Items marked with a release of ??? are still deprecated, but a firm deadline for their removal has not yet been established.

When deprecated items are removed, all usage of the feature in the repository should be updated or removed; including documentation.

When deprecating opcodes, in addition to the ticket, be sure to mark the opcode with the :deprecated flag; this will allow users to enable deprecation warnings selectively with:

.include 'include/warnings.pasm'
warningson .PARROT_WARNINGS_DEPRECATED_FLAG

And then receive runtime warnings if they are using any deprecated opcodes. The -w command line option for parrot can also be used to enable all warnings.

vtable entries

  • new_from_string [post 0.5.0]

    See RT #47011.

Opcodes

  • pioctl [post 0.5.1]

    See RT #48589.

  • store_global [post 0.5.0]

    See RT #48016. Replace usage with set_[hll,root]_global variants.

  • find_global [post 0.5.0]

    See RT #48018. Replace usage with get_[hll,root]_global variants.

  • get_mro [post 0.5.0]

    See RT #47976.

  • n_* math opcode variants [post 0.7.1]

    See RT #58410.

Class Features

  • Closure PMC [post 0.8.1]

    See RT #60654. The Closure PMC will no longer be generated by IMCC -- instead, closure semantics are built-in to the Sub PMC.

  • PMC union struct [post 0.5.0]

    See RT #48014. This will be removed once all core PMCs have been updated.

PIR syntax

  • old-style PASM registers [post 0.6.4]

    Old-style PASM registers without the $ character are deprecated; use PIR-style registers only.

    See RT #57638.

  • global keyword [post 0.6.4]

    See RT #48016 and RT #48018.

  • #line [post 0.6.4]

    Will be replaced by .line to be more consistent with other PIR syntax.

    See RT #45857, RT #43269, and RT #47141.

  • <.namespace <identifier >> syntax [post 0.5.1]

    See RT #48737.

  • .namespace [ "a" .. "b" ] [post 0.5.0]

    See RT #46715.

  • .HLL <string> ',' <string> [post 0.8.1]

    This will be replaced by .HLL <string>; the second string (and comma to separate them) will no longer be accepted. Use .loadlib for specifying the library name.

    See RT #57428.

  • vtable name .constants and __vtable overrides [post 0.5.2]

    See RT #48877.

  • Assignment syntax with opcodes [post ???]

    See RT #36283. When the first argument of an opcode is OUT, then the assignment syntax will be allowed, as it is today.

    In any other case (i.e. INOUT, 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"

  • .return in .begin_return / .end_return [post 0.7.2]

    The .return directive in a .begin_return sequence will be replaced by the .set_return directive. Likewise, .yield in a .begin_yield sequence will be replaced by .set_yield.

    See RT #58980.

  • .arg will become .set_arg [post 0.7.2]

    In a .begin_call sequence, the .arg directive will be replaced by .set_arg.

    See RT #58976.

  • .result will become .get_result [post 0.7.2]

    In a .begin_call sequence, the .result direcive will be replaced by the more descriptive .get_result.

    See RT #58978.

  • :lexid will become :subid [post 0.8.1]

    :lexid will be renamed to :subid.

    See RT #60592.

  • Exception Handlers won't automatically be disabled [post 0.8.1]

    Exception handlers won't be automatically disabled after 0.8.1. Any exception handlers that currently rely on this feature will need to either be more specific about what they catch or rethrow exceptions they don't recognize.

    See RT #60640.

Functions

PARROT_API changes to PARROT_EXPORT [post 0.8.1]

The PARROT_API name suggests something that is not the case yet. This will become PARROT_EXPORT after November 2008 release. (We will reintroduce PARROT_API on specific functions where appropriate post 1.0.0.)

See RT #60624.

Old-style MMD functions [post 0.7.1]

Parrot_mmd_add_function, mmd_expand_x, mmd_expand_y, Parrot_mmd_register, Parrot_mmd_register_sub, Parrot_mmd_destroy, Parrot_MMD_search_default_infix, Parrot_mmd_search_default, mmd_cvt_to_types.

See RT #60626.

src/pic.c and src/pic_jit.c [post 0.8.1]

These two files were a thin prototype implementation of Polymorphic Inline Caching that only ever applied to 4 opcodes, one of which has now been removed. The files (and all functions in them) are deprecated, and will be removed. See RT #60048.