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for 0.7.0:
* filed off the roughest edges (or, perhaps, at least hammered down the
protruding rusty nails and snipped off the trailing razor wire,
leaving some filing for later:-) from the monster
EVAL/EVAL-WHEN/%COMPILE/DEFUN/DEFSTRUCT cleanup:
** made inlining DEFUN inside MACROLET work again
* incompatible changes listed in NEWS:
** changed debugger prompt to "5]", "5[2]", "5[3]", etc.
** changed default output representation of *PRINT-ESCAPE*-ed
unprintable ASCII characters to #\Nul, #\Soh, etc.
* some easy FIXMEs with high disruptive potential:
** Search lists go away.
** Grep for ~D and and change most of them to ~S.
* more renaming in global external names:
** used DEFINE-THE-FOO-THING and DEFFOO style consistently (and
deprecated supported extensions named in the DEF-FOO
style, e.g. SB-ALIEN:DEF-ALIEN-ROUTINE)
** reserved DO-FOO-style names for iteration macros
** finished s/FUNCTION/FUN/
** s/VARIABLE/VAR/
** s/TOP-LEVEL/TOPLEVEL/
* global style systematization:
** s/#'(lambda/(lambda/
** four-space indentation in C
=======================================================================
for early 0.7.x:
* building with CLISP (or explaining why not)
* faster bootstrapping (both make.sh and slam.sh)
** added mechanisms for automatically finding dead code, and
used them to remove dead code
** moved stuff from warm init into cold init where possible
(so that slam.sh will run faster and also just because
ideally everything would be in cold init)
** profiled and tweaked
* more EVAL/EVAL-WHEN/%COMPILE/DEFUN/DEFSTRUCT cleanup:
** made %COMPILE understand magicality of DEFUN FOO
w.r.t. e.g. preexisting inlineness of FOO
** used %COMPILE where COMPILE-TOP-LEVEL used to be used
** removed now-redundant COMPILE-TOP-LEVEL and
FUNCTIONAL-KIND=:TOP-LEVEL stuff from the compiler
** made FUNCTION-NAME logic work on closures, so that
various public functions like CL:PACKAGEP which
are now implemented as closures (because
they're structure slot accessors) won't be so
nasty in the debugger
** %SLOT-ACCESSOR/%SLOT-ACCESSOR stuff can probably go away,
since we inline expand all slot accessors into
%INSTANCE-REF and the optimizer knows all it needs
to know about that.
* rewrote long-standing confusing error restarts for redefining
DEFSTRUCTs
* outstanding embarrassments
** cut-and-pasted DEF-BOOLEAN-ATTRIBUTE (maybe easier to fix
now that EVAL-WHEN does what it should..)
** incomplete manual
** :IGNORE-ERRORS-P cruft in stems-and-flags.lisp-expr
** weird double-loading (first in GENESIS, then in warm init)
of src/assembly/target/*.lisp stuff, and the associated
weirdness of the half-baked state (compiler almost but
not quite ready for prime time..) of the system after
cold init
* fixups now feasible because of pre7 changes
** ANSIfied DECLAIM INLINE stuff (deprecating MAYBE-INLINE)
* miscellaneous simple refactoring
* belated renaming:
** renamed %PRIMITIVE to %VOP
* These days ANSI C has inline functions, so..
** redid many cpp macros as inline functions:
HeaderValue, Pointerp, CEILING, ALIGNED_SIZE,
GET_FREE_POINTER, SET_FREE_POINTER,
GET_GC_TRIGGER, SET_GC_TRIGGER, GetBSP, SetBSP,
os_trunc_foo(), os_round_up_foo()
** removed various avoid-evaluating-C-macro-arg-twice
cruft
* added mechanisms for automatically finding dead symbols is
package-data.lisp-expr (i.e. those symbols not bound,
fbound, defined as types, or whatever), and used them
to remove dead symbols
* made system handle stack overflow safely unless SAFETY is dominated
by SPEED or SPACE
* Probably get rid of or at least rework the fdefinition/encapsulation
system so that (SYMBOL-FUNCTION 'FOO) = (FDEFINITION 'FOO).
=======================================================================
for 0.9:
* refactored in preparation for moving CLOS into cold init and merging
SB-PCL:FOO with CL:FOO (for FOO=CLASS, FOO=CLASS-OF, etc.)
** systematized support for MOP (new regression tests, maybe
new SB-MOP package..) to try to make sure things don't
get mislaid in the upcoming CLOS restructuring
** extracted type system from SB-KERNEL into new SB-TYPE
package
** reimplemented GENERIC-FUNCTION as a primitive object (or
maybe made SB-MOP:FUNCALLABLE-STANDARD-OBJECT the
primitive object, and then let GENERIC-FUNCTIONs
inherit from that) instead of structures with
:ALTERNATE-METACLASS and funcallableness. Now
FUNCALLABLE-INSTANCE can go away. (And now the new
funcallable primitive objects need to go into
collections like *FUN-HEADER-WIDETAGS* where
FUNCALLABLE-INSTANCE objects used to be.)
** reimplemented CONDITIONs as primitive objects instead of
structures with :ALTERNATE-METACLASS. Now (between
this and the change to GENERIC-FUNCTIONs)
DEFSTRUCT :ALTERNATE-METACLASS can go away.
** (maybe) Now INSTANCE_POINTER_LOWTAG can become just
STRUCTURE_POINTER_LOWTAG, and the concept of
SB-KERNEL:INSTANCE (including INSTANCEP,
(SPECIFIER-TYPE 'INSTANCE), etc.) can go away.
* moved CLOS into cold init, in order to allow CLOS to be used in the
implementation of the core system (e.g. the type system and the
compiler) and in order to support merger of CL:CLASS with
SB-PCL:CLASS
* (maybe) eliminated warm init altogether in favor of cold init
* (maybe, especially if warm init can be eliminated) rationalized
the build process, fixing miscellaneous pre-0.5.0 stuff that's
transparently not the right thing
** removed separate build directories, now just building in
place with .sbclcoldfasl extensions
* (maybe) more refactoring in preparation for merging SB-PCL:FOO
into CL:FOO: reimplemented type system OO dispatch
(!DEFINE-TYPE-METHOD, etc.) in terms of CLOS OO dispatch
* merged SB-PCL:FOO into CL:FOO (and similarly CLASS-OF, etc.)
* added some automatic tests for basic binary compatibility, in hopes
that it might be practical to maintain binary compatibility
between minor maintenance releases on the stable branch (but no
promises, sorry, since I've never tried to do this before, and
have no idea how much of a pain this'll be)
========================================================================
for 1.0 (fixes of lower priority which I'd nonetheless be embarrassed
to leave unfixed in 1.0):
* all too many BUGS entries and FIXMEs
=======================================================================
other priorities, no particular time:
* bug fixes, especially really annoying bugs (ANSI or not) and any
ANSI bugs (i.e. not just bugs in extras like the debugger or
"declarations are assertions", but violations of the standard)
* better communication with the outside world (scratching WHN's
personal itch): I don't want socket-level stuff so much as I
want RPC-level or higher (CORBA?) interfaces and (possibly
through RPC or CORBA) GUI support
=======================================================================
important but out of scope (for WHN, anyway: Patches from other people
are still welcome!) until after 1.0:
* DYNAMIC-EXTENT
* sadly deteriorated support for ANSI-style block compilation
(static linking of DEFUNs within a single file or
WITH-COMPILATION-UNIT)
* various GC issues (exuberant cut-and-paste coding,
possibly dangerously over-conservative handling
of neighbors of function objects, general GC efficiency)
* package issues other than SB!TYPE, SB!MOP, and dead exported
symbols
* Any systematic effort to fix compiler consistency checks is
out of scope. (However, it still might be possible to
determine that some or all of them are hopelessly stale
and delete them.)
===============================================================================
other known issues with no particular target date:
bugs listed on the man page
hundreds of FIXME notes in the sources from WHN
various other unfinished business from CMU CL and before, marked with
"XX" or "XXX" or "###" or "***" or "???" or "pfw" or "@@@@" or "zzzzz"
or probably also other codes that I haven't noticed or have forgotten.
(Things marked as KLUDGE are in general things which are ugly or
confusing, but that, for whatever reason, may stay that way
indefinitely.)
=======================================================================
"There's nothing an agnostic can't do as long as he doesn't know
whether he believes in anything or not."
-- Monty Python.
"God grant me serenity to accept the code I cannot change, courage to
change the code I can, and wisdom to know the difference."
-- Erik Naggum
"Accumulation of half-understood design decisions eventually chokes a
program as a water weed chokes a canal. By refactoring you can ensure
that your full understanding of how the program should be designed is
always reflected in the program. As a water weed quickly spreads its
tendrils, partially understood design decisions quickly spread their
effects throughout your program. No one or two or even ten individual
actions will be enough to eradicate the problem."
-- Martin Fowler, in _Refactoring: Improving the Design of Existing
Code_, p. 360
"I wish I didn't know now what I didn't know then."
-- Bob Seger
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