-*-text-*-

==============
EDEN TODO LIST
==============

BUG details are now held in the SourceForge database: see
http://sf.net/projects/eden


IMPROVEMENTS
============

o Exactly how inefficient is the list implementation in tkeden? Does it scan
  from the end each time? How would we go about storing an entire dictionary
  in Eden for example, for Hangman?
o Find original Donald lexer lex.l - see what changes were made for the
  (handwritten?) lex.c in tkeden
o Check out hash function used in Eden/symbol.c. Will the hash index ever be
  > 0xFF: constantly EORing with a char...???
o Profile tkeden and improve most called regions, especially for Chris'
  Data Explorer...
o Another notation, like Scout, to handle whole windowing system? Carters
  says hard because X assumes user has control of windows, not the program.
o Sort out inconsistencies between notations.
o Think about JVM and relation to the Eden VM - what possibility of cross
  fertilization?
o "add layers to donald through scout" (from TODO)
o "Wrap standard I/O in a tk window" (from TODO)
o Remove reliance on PATH (eg ImageScale uses 'pnmscale'). Either
  write a wrapper or set variables with the complete path for each utility
  used.
o A single step facility to enable modeller to monitor each redefinition?
o dtkeden in heterogenous environments?
o Vastly improve the textual script viewer: hyperlinked definitions, fast
  rebuild... link to a web browser? Write an Eden script to communicate with
  Netscape (or any browser) and send the text of the script.
  Eg netscape -remote 'openURL(http://www.dcs.warwick.ac.uk/modelling)'
o Higher order definitions somehow? Multiple similar definitions cannot be
  done particularly neatly at the moment. Or can they? See the speedo eg.
o Link Javabeans with dependencies in Eden. Use, or at least look at jacl?
o Get rid of alloca? See http://www.eskimo.com/~scs/C-faq/q7.32.html
o Automatically generate dependencies for non-local variables used in
  functions - recall note from the back of the Eden manual. Don't retrigger
  actions though.
o Maybe Misc should be a subdirectory (or maybe just in the directory of?)
  Eden
o Make lint happy with the code. Haven't got it to run the second stage yet.
o Use an enum for the type inside Datum - would this show up in debuggers,
  making it easier to see?
o New feature, perhaps built in: generate increments to a clock integer at
  a given real time frequency
o Look at BLT and integrate some features?
o Store definitions on disc rather than in memory - like VM? Need a better
  file format. WMB said would be good to be able to bring in and take out
  whole sections of script as appropriate.
o "combination observables" (eg distances between billiard balls) that can be
  defined, but don't take up space until you query them. Or perhaps these are
  just functions.
o Link the Eden library to Java using JNI?!
o Perhaps the symbol table should be a /list/ with special (associative)
  indexing. Then items could be removed easily.
o Re-do the user interface in Scout?
o Operators += etc only work on integers
o An emacs highlighting setup for Eden code?  See
  /gnu/share/emacs/20.3/lisp/font-lock.el.
o symbols() only takes one argument?  Should give an error message if given
  more than one.
o Link with emacs as an editor.  Use elisp.  Colours to represent bits that
  have been changed, and need sending to tkeden - send them with a key press.
o Finish mouse dragging facility - can we get COG to work with the current
  setup?
o Get around sensible CWD problem on Windoz by adding a cd primitive to
  Eden, and call this from Run.e files
o More obscure information in About tkeden should appear only when you
  press a "more information" button
o Edit menu with Cut and Paste?
o Make it possible for users to link in other translators for notations at
  runtime.
o Some way to see /values/ of Donald things without having to
  representation on the screen - view values in the View window...?  Or
  implement the ? operator in Donald properly (seems to be partially
  implemented at the mo... or am I being confused by the ? Donald operator
  for "this is a line of Eden?")
o Access Eden lists from Donald:
    %eden
    func f { writeln("f ", $); return $1 + 1; }
    %donald
    int f1
    f1 = f!(1)
  works, but the equivalent for lists does not.
o List indexing is not implemented in back-ticks:
    1:> s="l[2]";
    2:> l=[1,3];
    3:> writeln(`s`);
    @
o One undefined item should not stop the entire screen from being updated.
o symboltable()# fails when the table gets large - error running out of
  heap?  Could make heap a dynamic array, I suppose...
o Fix undefined problems: need more eager operators.
o Get rid of "program too big" error: make prog a more dynamic array that
  is realloc'd when this error would have occurred
o Donald 'pi' token - is it used?  Meurig was trying to '%donald; real pi'.
o Port Sasami to Unix
o A 'warnings' window instead of the error messages appearing in the
  history.  Visual warning to the user when something has appeared there.
  Warnings for "you have declared a symbol with a name similar to another",
  "this is now @" etc along with error messages (which would prob. be in a
  different colour).  Sometimes it is appropriate to warn a user that they
  are creating a new symbol (eg when /using/ a model), when building -
  probably not.
o a minor version number to represent changes to the Tcl / Eden library stuff?
o change each sprintf to snprintf and include the buffer size to attempt to
  stop all these buffer overruns.
o Radio button for the notation in the input window?
o Make long variable names possible (apparently >20 chars fails, especially
  in Scout)
o ttyeden readline: get it to complete from the symbol table and built-ins.
o "Freeze" the state function - want the equivalent of SQLs COMMIT or
  ROLLBACK.
o A "save script" function for ttyeden: could rapidly prototype using the
  new readline interface, but cannot save.
o guessLibLocation should read search a predetermined path to find a
  configuration file which determines the lib files location.
o 'find' symbols facility should be better: need to be able to find
  definitions and usages separately.  Need to be able to find 'is'
  separately from values.
o Navigation around the view definitions interface is awful.
o A function to 'forget' a set of definitions in the correct order?
  Perhaps by redefining all to @, then removing.  Perhaps it should
  interactively prompt to make sure that we don't accidently remove
  definitions we would like to keep: a kind of 'rm -i' prompt.  Perhaps it
  could print some information about whether it managed it or not.  Perhaps
  we need an argument to tell it to be interactive or not.
o Redesign into a one-window interface?  Then have multiple input windows,
  one for each notation?
o Inconsistency: textbox and text windows in scout with the same number of
  vertical lines are different sizes.
o Inconsistency: use outlinecolor for circles outline, color for lines
  outline.
o Inconsistency: use div in donald, / in eden.
o Inconsistency: use semicolons in eden, not in donald
o Inconsistency: don't declare in eden, declare in donald.
o Inconsistency: last element of a scout window doesn't have a comma, the
  others do.
o Inconsistency: PI in eden, pi in donald
o Inconsistency: scout references its windows from the top left and donald
  from the bottom left
o If any element in the screen is @, the whole screen is not displayed
  (apparently).  Improve this to give a warning if something in the screen
  is @.
o '?insert', '?append' fails.  This is because the parser expects '?',
  lvalue and keywords such as insert and append are not lvalues.  Need to
  figure out how to get the parser to accept these types.
o Test new Eden bison.simple with eden < file, read file, piped input (via
  a translator)...
o Link translators (eg eddi) to tkeden via pipes (tkeden pipe function?)
  and multiple Tcl windows
o wouldBlock: change to getcWouldBlock and put in rl_getc_wouldblock logic
o Check "additional possibilities" sum in bison.simple - does it give the
  right answer?
o View -> Eden definitions: an option to sort and indent according to
  definition level?  (This could be used to quickly find the basic model
  parameters).
o Make a documentation package: cron job to nightly tar and gzip the HTML
  Eden, Scout, Donald documentation (post-SSI processing: wget? need
  version numbers or stamp package with the date: make the package each
  night and see if it has changed).
o Change colour of interrupt button when it might be necessary to press it
  (when a RunSet is being processed?)
o Make it possible to extend the stack when overflow occurs by implementing
  a non-contiguous stack.  Need to ensure that nothing attempts to walk the
  stack to be able to do this tho'.
o Make it possible to extend the heap when overflow occurs.  (Example
  problem: see OASYSPermutations/gen_table.e).  Perhaps allocate memory
  with malloc when heap overflows.
o Highlight Eden / Donald / Scout keywords in the input window as they are
  entered using the Tcl text tag facility?
o Extend debug() to take combinations of categories to filter debugging
  output, now that I've introduced CALSTK etc.
o In the View Definitions window, use tags to highlight references to other
  variables - click and they are displayed.  Add a back and forward button
  as per web browser.  Or perhaps write an export to HTML feature and link
  with a web browser?  (Perhaps use EMHTTP - press Reload on the web
  browser and it'll reload the page of definitions).
o An incremental search facility on Ctrl-S, like emacs?
o Use a more decent File -> Include widget: try FileSelectBox from Tix (but
  these widgets are megawidgets which probably required [incr Tcl] and
  [incr Tk] - the OO extensions to Tcl/Tk).
o Take a look at TkTable - a spreadsheet / table widget: could we improve
  the View Definition windows with this?
o Change the mouse cursor when tkeden is busy (see example from Tk FAQ #4.3
  How do I change the Tk cursor?).
o A +/- button in View Eden Definitions to expand / contract display of
  agents (eg AGENT system should probably be contracted most of the time).
o Put an error message pane underneath the input window (+ make it possible
  to resize it?)
o Separate error stream into another Tcl window.
o configure.in: can we cache more?
o Option to update "View Eden Definitions" continuously (actually, on every
  RunSet switch).
o Link Prev, Next Tcl history (in tkeden and ttyeden) with the history
  as stored on file (a bit like the shell).
o Wrap Sasami window in Scout
o Feed mouse placement in Sasami window to Eden (perhaps in terms of a list
  of polygons that the mouse is currently over - Benjohn describes a
  technique involving turning the OpenGL renderer into a special mode, and
  rendering a window one pixel in size).
o " %scout" - make ex.c ignore leading spaces / tabs
o Inp_Dev_Save might be an unnecessary hack: perhaps Inp_Dev should be
  volatile?
o When opening the Scout window, if there is any content outside, make it
  bigger.
o Get Scout/print.c printdef to use the constants array etc
o Fix Scout so that on View Scout or Scout ? query, the correct value of
  sensitive is shown
o Input window: an Undo function (particularly wrt paste / insert)
o Improve Scout / Donald unhelpful "parse error"
o Fix tcl("reinit");
o Un-hack the dashed line stuff using the Dash patch in Tcl / Tk 8.3.3...
o Add a File->cd
o "a=1; while (1) { a++; }" causes tkeden to hang: not even the Interrupt
  button works (but Ctrl-C does) - is it possible to make the event
  from the Interrupt button be processed straight away (despite Tcl update
  not having been called - perhaps via some sort of error mechanism?) but
  leave the other events until Eden is ready, as before?
o Sasami: remove the globTogl hack
o Recode all references to interp->result (see Tcl_SetResult(3))
o Add some syntax to allow removal of triggers: ~>![] ? (if ![] is valid
  syntax elsewhere)...
o Resize viewport: if viewport size has not changed, don't do anything.
o A View Sasami Definitions window for completeness
o Can we rework Sasami's numeric IDs into symbolic ones for ease of
  tracing...?
o Replace the multiple Save options with Save and Save As options,
  with radio buttons to turn off saving of various notations in the
  dialogue box.
o Don't create required windows (eg History) until it is actually
  required to speed initial startup?
o Windows: Try and get the executable to use the Scriptics-provided
  DLLs (so can use Tcl 8.3 with the dash patch etc)?  Perhaps look at
  using the tcl-stub stuff...?
o Sasami: [Ben] Smooth vertex normals based on face normals and face
  adjacency
o [Ben] Speed controller example shows some display corruption
o [Ben] Note : Enormous (40 units+) polygons screw up lighting. OpenGL
  driver bug?  (Addition) Not necessarily bug. Maybe something to do with
  oblique specular angles on large polys looking wrong (despite being
  "right" in a mathematical sense). Imagine a poly large enough that the
  vertices on both sides had specular hilights and then interpolate
  across...
o Install a non-debugging version for DCS for performance??
o Rework Misc functions in the style of random if they are declared in
  system header files
o Change Scout int_tree assertion to a more helpful error, or modify the
  Scout parser to only allow integer values.
o Find should beep when search proceeds beyond the end or beginning of the
  document.
o Finish Help -> About Donald, Scout, Sasami
o Help -> About LSD
o Remember the state of file type selection between File -> Opens etc
o File -> Restart !
o Find in the Quick Reference Guide windows...
o Can we get the OK button in the Quick Reference Guide windows to take up
  less space?
o DFfont is read by Donald at Donald startup, but Donald lacks dependency
  in this area and it's difficult to convince it to re-render the
  statechart with a new font (for example), whereas Scout seems to be
  better implemented here.
o Un-hack the Scout integer / real implementation (give Scout true integers
  and true reals).
o Remove "VB-like" features completely.
o Query ? operator now shows sp->master, but this pretty much always seems
  to say "input".  Can we change sp->master or get information from
  elsewhere that would make this more useful?  Need to look at the calls to
  pushMasterStack() and what that actually does.  Perhaps push the stack
  trace so far: "input window:proc p:action q"?
o Do 'Previous' after error & move cursor to position of error (making
  interaction with tkeden somewhat like interaction with a debugger)
o Save definitions should not save the ones belonging to 'system'.
o %scout causes a few system definitions to be entered under agent 'input'
o ON should actually be MOUSEBUT + KEYS or something, so can narrow down
  the sensitivity even further (ignore keys, for example).
o "%scout\nscreen &= <window>;" doesn't work - I presume the parser needs
  correcting to allow display literals after &=
o An eden_allow_proc_redefine variable (at the moment, redefining a
  proc to a value is not allowed so as to avoid accidental overwriting
  - but sometimes this can be useful).
o An eden_allow_builtin_redefine variable?
o Sometimes the error message needs to read from further back than
  just the current line (eg when the line before is missing a
  semi-colon in Scout).
o Can we make it unnecessary to declare Eden variables to Scout?
o On an error condition, should make sure that the line containing the
  error (which was hence ignored) does not appear in history.  This is
  complicated by the fact that the contents of the input window is
  currently put into history in its entirety.  Perhaps Eden itself
  should push things into history as it executes.
o one-line escape into Scout, Donald... whatever... from Eden.
  Perhaps a notation change with characters on the same line (eg
  '%scout int i') would be a change for that line only?
o Add __PRETTY_FUNCTION__ to DEBUGPRINT output?  (See gcc.info...)
o Which way up are the coordinate systems in Donald, Scout and Sasami?
  Document in the quick references.
o Add a way of stating literal strings without needing to escape
  characters to Eden - perhaps like the shell << operator (usage eg:
  cat <<EOF
  stuff that doesn't need escaping
  EOF).
o A 'help' command in ttyeden
o Only tell re eden_notice_undef_reference on every 20th error, say
o Tcl update on error, so that the error window doesn't appear to be blank
  when we have a series of errors (although the 'update' has caused
  problems in the past).
o Add type information to ? output
o Can we give more information during the "reference to undefined variable"
  message?
o Don't try and do dashes with Tk <8.3: info tclversion, info patchlevel
o Give some sensible error message if can't find initial library files
  rather than just "Tcl errorInfo... blank"
o Link with Tcl/Tk stubs instead to remove the dependency upon exact Tcl/Tk
  version (eg currently linking with 8.3 here, but 8.2 will probably do on
  most Linux systems).  Or perhaps stubs are about Tcl extensions?
o Add Tk img package lib to Windows distribution...
o Change _tkeden_showxoutput to _introspect_xoutput.  Then make it redefine
  a symbol.  Can then add a proc to print it out, or do something more
  clever.  In fact, change all writes to fds to change variables which may
  then trigger some output.
o Donald, Scout etc should not have their own symbol table - the
  information should be stored in the Eden symbol table.
o Some kind of interface telling when something has changed / been added.
  This could be used to interface to an editor, a filesystem, a graphic
  representing doorbell data?
o sprintf should truncate to strlen of first argument, then remove checking
  in donald.init.e + change FAQ entries
o Integrate the "Alpha" (cross-platform?) editor which seems to be mainly
  written in Tcl as an on-line editor for definitions
o Rename stuff in trans.e (or perhaps use virtual agency?) so it doesn't
  stomp on any existing models
o Redo Arca translator in Chris Brown style?

o Scout screen_width etc are system definitions - should be read only by
  the user and possibly not appear in View Scout Definitions...?

o sensitive MOTION etc settings not shown in View Scout... (and Save Scout)

o Projects database model

o A slide presentation notation?

o Change DCS old date-based tkeden versions to numeric ones (0.9 and
  lower).

o Don't record duplicate entries in keyboard history (ttyeden... tkeden?)

o Fix bug: trying to do notation() on the same notation twice will probably
  cause the parser to mess up and certainly causes the radio button
  handling code to attempt to create the same window twice and mess up.

o Remove all traces of Patrick's mouseClick stuff (in Scout/symbol.c:
  automatically created '_click' procedure etc).  Figure out a solution for
  reworking models that used this feature.

o An //= operator, or make += work on strings (first option probably better
  as + is not overloaded for strings).

o Procedural aspects of notations should go.  Eg % for changing notation
  (blocks of notation should be delimited another way -- with brackets?),
  >> has the same problem, replace autocalc=0; with autocalc--; etc...

o dtkeden: command line option for automatically logging in as a certain
  agent.

o A solution for running large-area models on small screens (how to
  redefine the font size... and all geometry?)

o Changing nSegments in cruise speedo apparently causes a freeze.

o Lack of a scrollbar in the DOS window causes problems on Windows.  Need a
  solution: perhaps wrap stdout in a tk window... or can we redefine the
  Eden 'stdout' variable?  Nope -- the value changes, but doesn't affect
  writeln etc....  Can we copy cmd.exe (not command.exe) from an NT machine
  and see if that gives us a scroll bar?

o "ash"[1] is a syntax error

o s='s'; writeln(s[1]) fails.  Not possible unless I can figure a way of
  getting the address of a char.  Aha... try ctos()...

o "index out of range" errors don't give information about which type of
  command produced the error

o ImageScale still has problems.  It may work OK with .ppm input files on
  UNIX, if pnmscale is in your path (at DCS it is
  /usr/local/bin/pbm/pnmscale).

o Find... dialogs should not be modal (ie should not stop rest of
  application working...)

o Rework View Scout, Donald... window menus to have an Edit menu, as per
  View Eden...

o Print information from the entire Inp_Dev stack when printing error
  messages (this should provide a kind of stack trace)

o Does beep counter reset on every beep?  Ie if we have a continuous
  beeping situation (eg interpreting a bunch of Eden in EDDI by mistake),
  it should not beep at all instead of beeping every three seconds.

o Make notation change in ttyeden persist across EOF (including -e).

o Page down in View Eden Definitions seems to work on Windows but not UNIX?

o Test Sasami with a model which calls eager() in a tight loop - Ben had a
  note about this in the original render.c source (should be OK as eager
  forces a Tcl update, and togl will then call the r_render callback).  Tim
  tested this -- there is a bug.

o installeddi() should do a NOP the second time it is called.
  Actually... unnecessary as it doesn't seem to do any harm?  Actually need
  to fix notation() so that a second call will replace the info gathered
  from the first (I suspect it actually ends up with multiple copies on the
  list currently).

o eden_allow_redefine_builtins -- a new variable to turn this option on so
  that we could redefine writeln for example to get EDDI query results into
  a string instead of stdout...

o Notation change requires exact match -- good.  But it needs to ignore
  white space at the end of the line ("\n%eddi    \n" fails).

o Windoz: after accepting a file from File -> Open by pressing return, the
  input window then appears to have focus but alt-a does not work

o Split change.log file?  It's getting a bit long to view via the Help menu
  now...

o An 'sqleddi' command to start up tkeden with all Meurig's stuff?

o Add SQLEDDI questions to Eden FAQ.  Eg stuff must be in upper case, lack
  of # character...

o SQLEDDI error messages... they should not come out on stdout, they should
  show the context, they seem to be very confusing when you feed it
  rubbish.

o Notation radio buttons should be packed more sensibly if tkeden window is
  small

o A debugging mode which prints out the name of the currently executing
  function and the line that it is in... kind of language level debugging,
  as debug(1) is too low-level to be useful mostly.

o Debugging is strange in Eden due to definitive machine: we want to know
  /why/ something happened.  In procedural languages a stack trace will do
  but definition update and triggered actions confuse this picture in a
  definitive system.


o Observation-oriented database optimisations on EDDI relational algebra
  (eg move selections inside joins)


o EDDI: access Eden functions in 'is' views.  Perhaps like Donald '!'?.  Eg
  MARKSPERCENT is mul!((MARKS % q1), div!(100,8))

o tkeden quits when this redefinition is made:
(load this file)
%eden
_tkeden_showxoutput = 1;

%scout
image source = ImageFile("png", "/dcs/emp/ashley/EMProjects/Scans/10c1.png");
window firstImage = {
  type: IMAGE
  box: [{10,10}, {490,240}]
  pict: "source"
  border: 5
  relief: "raise"
};
screen = <firstImage>;
(give this input)
%scout
image source = ImageFile("png", "/dcs/emp/ashley/EMProjects/Scans/11c1.png");
window firstImage = {
  type: IMAGE
  box: [{10,10}, {490,240}]
  pict: "source"
  border: 5
  relief: "raise"
};
screen = <firstImage>;


o Create a Tk console window if required, using Tk_CreateConsoleWindow
  as per Tcl_AppInit in tkMacOSXAppInit.c?  (Will this improve the
  console facilities on Windows?)

o Document cost of the various list operations:
init ([sdf, sdfsd, dsaf])          ll handle (from count?!)
listsize (l#): O(1)                ll oracle
sel (retrieve / set l[n]): O(1)    ll oracle
shift: O(n)                        ll oracle handle (ll--)
append: O(1)                       ll oracle handle (ll++)
insert: O(no items after insertion point)  ll oracle handle (ll++)
delete: O(no items after deletion point)   ll oracle handle (ll--)
concat: ??  eg lr is l1 // l2              ll1 oracle ll2 oracle llr handle (ll1+ll2)

o Abhir would like a "repeat last command" key shortcut (ie previous,
  accept).

o Need to correct the Eden manual:  eval() isn't a real function:
a=1;
proc p { writeln(eval(a)); }
p(); /* prints 1 */
a=4;
p(); /* prints 1 -- whoops */

eval() doesn't exist in ttyeden-jun201996 (which you need to run on gem).
Or tkeden-sep261997
Or tkeden-dec151997
Or tkeden.S-dec151997
But it does, with this problem, in dtkeden-sep31999

o It isn't possible to write an assert function in Eden.  eval
requires an unquoted expression as input (so the exact expression
cannot be passed in as a parameter) and it evals at parse time, not
when the containing procedure is called.  execute cannot be used as it
returns the error status from parsing + invoking the string, not the
value of the result.  Duh!

o ttyeden-jun201996 says "Killed" when run directly on cottage.  The wrapper
shell script conceals this error.


o On Mac OS X:

TK/TCL PROBLEMS
- Down scroll buttons not visible
- Dragging windows requires click to make active first
- Maximise button doesn't work

COSMETIC
- Change View menu to Window?
- Accept button background should be grey, not white (a Tk problem?)

INTERFACE
- Can't select text in Eden Definitions, or Scout definitions, or the
  help windows.  Tried removing -state disabled.  Also tried inserting
  -insertbackground blue.  Is this a focus issue perhaps?
- Most key shortcuts don't seem to work.
- Default buttons (eg Help -> About tkeden -> OK) should glow and respond to
  press on Return.
- Eden Definitions menu doesn't appear (Save, Find, Rebuild, Update, Close)
  - ... reimplement Eden Definitions menu as a bunch of buttons?
- Apple-W (for close window) doesn't work anywhere
- Implement a console window (tkConsole isn't quite right...)

BUGS
- File -> Open / Execute... cancel... NavGetReply failed, -128
- Apple-Q, Apple-H don't do anything.  (Previously found that "Quit is
  not registered in the commandTable hash (commandEntryPtr == NULL)").

IMPROVEMENTS
- Include Tcl/Tk frameworks within the application bundle, so the user
  doesn't have to install them?
  - Need to look up @executable_path in ProjectBuilder mail archives
- Sasami!  Togl on Mac OS X... people seem to be moaning about 'main' being
  null presently (April 2002)



o Parser documentation

o Help -> About EDDI

o Refactor the libLocation guessing stuff for the various platforms.  Take
  it all out of main.c!

o change.log file accessible from the website somehow (link to
  ~empublic/lib?)


o emprojects in ~empublic/bin to start up a projects database with
  persistence.  (Need to fix commas bug first :<)

o Improved Eden lists... then create a %eden2 notation which does this
  transparently.

o Figure how to rework existing models to cope with removal of _mouseClick
  in 1.17 (railway accident messes up, for example)

o Add an Eden log command, which specifies a file to start logging
  stdout (and stderr?) to.  dup stdout, open it again (see man dup),
  then read this every so often (after every RunSet?), and write this
  to the log file.  Nope -- this doesn't work.  Perhaps you can't read
  from stdout.
  Another way might be to define my own fprintf function and link Eden
  with this?
  Or can we redefine stdout once the process has started?
  Don't really understand the difference between fds and streams :(
  I'm sure this has been done in other tools (shells, mysql, tee...)
  Java System class seems to be able to reassign out, err etc

Is this one fixed?
o Saving multiple history files by moving them causes problems when logged
  in on multiple machines as the same user and running tkeden on them all:
  get "stale remote file handle" from flush $histFile in edenio.tcl


o mv arca.lib arcalib.eden (once Arca translator is fixed)

o query output should limit value display to one or two lines?

o eden_backticks_dependency_hack: what does this do?  Perhaps make it a
  standard part.

o Input window should take note of the indentation level when return is
  pressed and create the same number of tabs as the line above.

o fopen("thing"); quits Eden: need fopen("thing", "r");

o Link with regular expressions library and use that instead of CB's split
  etc?

o Expose eden_notice_undef_reference, _tkeden_showxoutput etc in a Scout
  window as standard to give a more visibility to these settings and make
  them easier to change.

o EDDI join * operator appears to be right-associative.  Probably should be
  left associative so that Q*A*P still works in sensible time even if A and
  P are very large.  In fact, probably want most operators to be
  left-associative: right-associative is more the special case, required
  for function application, exponent etc.  The left-associativity probably
  occurs due to splitting the string from the left.

o Get a heap overflow error when doing a massive join in EDDI.  Seems to
  come possibly from the 'return tlist;' in njoin()?  Does a return value
  go via the heap?  Presumably we need to make all those things in njoin
  auto variables... but that didn't seem to make much difference.

o How about some confirmation from EDDI when making massive
  joins... "about to start calculating 8000000 rows: OK?".  Should be able
  to turn this prompt off too.

o Some way of querying whether it is /possible/ to forget a symbol (without
  actually forgetting it yet).  [Tim's idea]

o sasamiexamplesCarter1999... load test.s, view eden definitions with all
  translations on, then select just "initialisation"... nothing appears.
  Select all or "system" works OK.

o An Eden timer(proc, time) function.  This should set up an OS callback
  for that amount of time delay.  The Eden process should block otherwise,
  if it has an empty Runset.  Then could use this for examining the
  filesystem on a regular basis without doing a busy loop.

o Can we access a persistent EDDI database from a web server?  Eg to serve
  the EMpress database.  Perhaps use a named pipe for textual communication
  (not much good for multiple clients though).

o Lots of stuff in the symbol table seems to cause View Eden Definitions to
  mess up.  See 3doxo in ~croe/PhD/PRACTICAL/3doxo/Run.e

o Benjohn wants an integrated system for writing small graphical programs.
  Could we write a BASIC CB parser (BASIC syntax is good for beginners) and
  provide some PLOT functions, and even access to OpenGL Sasami stuff?  It
  should run in full screen mode (so the user obviously has control over
  the entire machine and is not distracted).  The editor is also
  critical... in BASIC, we can simply edit by rewriting lines: "30 PLOT
  x,y" rewrites the current definition of line 10.  The user only has to
  know that and the LIST command to create simple programs (cf Bonnie Nardi
  novice spreadsheet users get by with using only a small number of
  functions).  When the program gets large, they have to figure out how to
  control the LIST output so that it doesn't scroll off the screen, but by
  then they are more advanced as they've written a program larger than one
  screen (and can learn about pausing output with a key modifier, or
  parameters for the LIST command).  Strikes me that we are recreating a
  similar kind of interface in tkeden.  How about a BASIC, but with
  definitive features?

o Setting attributes of Donald geometry by using an escape to Eden is a
  total hack.  Eg need to say A_p_q, but Donald is already within p {} so
  could be unnecessary within Donald.  Donald has a string type so can we
  pull this within Donald?

o Write a Donald reflection mechanism in Eden.  COG could use this to save
  drawings created.  Replace execute("%donald\nline l1=... in COG with
  saveAndExecuteDonald("line l1 =... and maintain a list in Eden which is
  the Donald symbol table (ie l1 can be later redefined).  Then we can just
  write that list out to disk to save the Donald.  For COG, we'd need to
  distinguish between "system" and "user" geometry, not saving "system"
  stuff (eg the red selector dots).  Having done this, we could work on an
  agent-oriented parser using these Eden primitives we have constructed,
  and build a %donald2 notation, working out the inconsistencies with other
  notations as we go.

o Rewrite the Quick Reference Guides in Scout

o COMMIT / ROLLBACK... saving symbol table state to disk on COMMIT, and
  reverting to that on ROLLBACK.  ?

o Get pow to return an int if both arguments are ints.  This requires
  changing it from a simple c-library mapping to a C function.

o bounceCarter1999: a Sasami bug -- when the sasami viewport, open_display
  etc code is at the start of bounce.s, the Sasami viewport does not open.

o Add stuff for Allan's Dependency Modelling Tool:
  - Storage of info list within symbols.  Worried about memory allocation:
  but perhaps just freedatum in forget().
  - Func / procs to manipulate list
  - Make it a list of lists, each index being a defined user: dmt being 1.
  - Figure out how to remote control a dtkeden server using a socket
  - resetSymbolIterator, getNextSymbol functions to access symboltable()
  data one at a time

o Consider putting information about rgb2colour in Scout and Donald Quick
  Reference Guides.

o Optional warning to say when redefining an observable that already
  exists.  eden_notice_redefine?

o Actions are not evaluated when one or more of their triggers is undefined
  (or is it non-existent?).  This caused me a problem with writing a
  triggered procedure to mediate the donald better list symbol table to the
  outside; it may be the thing that stops the Scout screen updating when
  something is @; Chris has found it a problem with some mouse click
  problem.  This is probably the rule that things can't be evaluated if
  their inputs are not up to date?

o Does query ? operator create an undefined variable when asked about
  something that does not exist?  The output needs changing to show that
  the variable does not exist (as well as being undefined?).

o ?variable in Scout shows nothing at all if the variable is undefined:
  perhaps it should return @ or something.

o in the presentation notations we need to remove the max() and min()
  function definitions..  just in case they are used in the model, they are
  now as standard in tkeden1.41.

o Scout: ash.type = DONALD, to allow incremental redefinition of windows.
  window ash { type: DONALD } doesn't work (other values return to their
  defaults).

o CB's "number" template number=["read_all", [["0", "9"]]]; accepts the
  empty string.

o Wrap Sasami in a Scout window (for Chris R).

o Full PCRE documentation (in a Help menu?).

o Rewrite CB's split function using regular expressions (hopefully
  performance would improve).

o Replace Eden 'macro' function with one using a RE?  (Measure
  performance difference).

o Rethink regmatch output: multiple matches as well as subpatterns?
  (Then probably need a limit parameter).

o p=&w;
  p(); -- segmentation fault

o Make append, insert work on strings

o TKEDEN_LIB env variable to EDEN_LIB (accessible from ttyeden also)

o proc p { writeln("$1", $1); }; p("hi"); fails with
    index out of range (11 is outside the range 1...1) in p 
  proc p { writeln($1); }; p("hi"); is OK... ???!!

o Help->License should show GPL

o notations TODO:
   - denota translator: stop #s on stderr

   - redo Donald or Scout in Eden?

   - add %scout0, %lsd0, %eden0 etc as well as %donald0

   - IP translator synchronisation to avoid the one second delays


o edensl:
  - need to escape quotes within quoted parameters

  - problem with procs: edensl chunks statements, but execute needs
    whole procs at a time.

  - need to add underscores between symbol names and indices and also cope
    with multiple levels of lists... eg need l_1_2, not l12.

  - auto (within proc) lists?


o Can %edensl fully replace the built-in %eden?  Probably need to make sure
  that execute, include etc all do a "%eden\n" before they run to make sure
  this fully works.

o Generate machine code, not VM instructions to avoid the overhead of calls
  to function pointers.

o Fix AOP translator to use one buffer per notation, so that AOP
  translators can use other AOP translators.

o A restart menu option... or some way of clearing all state... (cf BASIC
  "NEW").

o Do we need the whole of the pcre directory, or can we just take a
  few choice files and put them in Eden/ ?

o remove cvs trans.c

o WMB would rather tkeden_vbfeatures be implemented as a Scout sensitive:
  value (?)


o Pointers used in procs become invalid after forget:
    proc p { forget(&a); }
    p();
    p(); /* segmentation fault */

  (the problem does not occur in "global", non-proc contexts, as the parser
  will create a when &a is used if it does not already exist.  This does
  not happen during a proc however, as the proc is not reparsed for
  execution).

o arca on PC...

o PCRE documentation.


o Scout/parser.y: ALIGN ':' int_exp, not JUST, as per SENSITIVE, to allow
  DFalign.  Similarly TYPE?
(important for Chris)

o ~wmb/public/projects/tools/translators/def2proc/EXAMPLES/guess.proc
  doesn't work in recent ttyeden, but works OK in ttyeden-1.6.

o 1|> g is f(2);
  2|> f=2;
  crash?!

o cruise controller falls over when nSegment is changed on Windows (and
  Mac?) but not Solaris.



o SQLEDDI bugs:

  1) joins cause "njoin has received at least one undefined table": garbage
     collector not working properly?
  ... fixed, but fudged: todo's seem to need % at end... should fix the
  underlying cause really...

  2) collating together several lines of SQL seems to cause odd errors.
     Doing the lines individually is OK.
  ... another awful todo() problem.  A number of possible solutions but
  none of them are easy.



o func f {}; f=2; gives error: f is func, not a read/write variable.  This
  causes a problem with the new spreadsheet funcs, if someone uses the
  observable name 'ceiling' for example (room3dsasamiCarter1999).  The only
  restriction (which we should change to a warning) is when assigning to a
  func/proc/procmacro.  Overwriting one of those with an is is OK, and the
  reverse is OK.

o Plug-in architecture.  Have a special directory within lib-tkeden within
  which users can drop folders containing Eden.  Eg for the Arca
  translator.  When Eden starts up, it searches this directory for
  specially-named startup files and executes them.  This is fairly
  easy... but ideally users would download such things from the
  repository... and how should we cope with platform-specific code there?
  Eg the Arca translator needs to be compiled for a specific platform.
  Have previously avoided putting platform-specific stuff into the
  repository, but perhaps we should allow this as long as they are named in
  a standard form, eg arcaWard2002/arcaWard2002-solaris-sparc?  Then the
  repository can spot these standard names and present a download facility
  for that subdirectory.  Or perhaps users just download the lot, then put
  the plugin for their platform into the directory?

o TEXTBOX getText adds a newline to the input.  It also gives @ until
  something is entered (is / should this be different from a blank
  string?).

o Resize the screen window when a new scout window is added if necessary
  (Liane's suggestion).

o Remove extra newlines read from TEXTBOXes.

o Add tkeden identity (filename + variant + version number?) to
  .tkeden-history



o Bug reported by Antony Harfield: Chris' logo parser gives Sig 11 on
  Windows... details in email 28 Oct

o Bug reported by JP re Scout?

o Liane and WMB bug: 1.46 (and 1.27) don't detect missing bracket after
  declaration of procedure.  (1.6 did).

o todo() bug present in Arca as well?  See email from WMB to James Butcher
  14/11/2002.

o Liane/WMB eddi input? fdl4Beynon2002 (see mails Nov 10)

o Look at Henry Southgate's Donald attributes problem

o Look at Alison's TEXTBOXES problem



o Work more on Mac port?  (Eg Patrick Sockett)

o Load Scout windows into Sasami imagemaps?  (This thought originated when
  looking at Apple's new presentation package, which uses a 3d "cube"
  transition between slides).

o Define ImageHeight etc to Scout?  (See email to James Butcher 14/1/2003)

o Make the fact that the Find dialog takes regular expressions (see
  examples in change.log for 1.17) more obvious, otherwise might cause
  problems: searching for 'b+c' doesn't do what is expected...
  (see email from Chris Roe 20 Feb 2003).

o Second point used in the frame in a textbox isn't actually a point
  variable.  Correct to use some other kind of spec?  (Mentioned by Ant
  Harfield 23/2/2003 email).

o Many people are getting "program too big" and that other message from the
  lexer... increase limits?

o a="\\\"$;{}[]abc";
  writeln(regreplace("\$", "b", a));
  Command terminated by signal 11

o "  %scout" fails: ignore leading spaces for notation transitions?
  (Causes problems when pasting in code, for example).

o Objects within objects in Sasami, like Donald openshape (Benjohn's
  suggestion)

o Adaptive clock rate in Jonathan's parking model.  If we've missed several
  deadlines in a row, then halve the clock rate.

o Clean up new Sasami work: do frustum properly, document properly...

o Finish fix of long list parsing for KC (I did some experimentation on
  this at version 1.49, but only managed to transform the problem into
  another dimension).

o Pixel access to the screen (use some game screen drawing API?)

o Do some run time analysis of Sasami: does sa_r_render_object_polys
  really call the various find routines a lot, and does this take a
  lot of time when we have many objects/polys?  (KC's 'creature'
  model).  If this is the case, replace Sasami's linked list+search
  dynamically sized arrays approach with actual static sized,
  immediate access arrays initially, and then dynamically sized,
  immediate access arrays.

o Fix Alison's bug.  Apparently
    %donald
    ?_sjdf0 = "col...r fill=solid"  (note the space)
    %eddi
    ?teacher;
    %eden
    ?teacher;
    var106 = ( ... " // str " )
    var1
  messes up...?

o Merge in Antony Harfield's latest AOP

o Access to a strstr-like function for JP

o Is eden_backticksblahblah mentioned properly in eden.txt?

o Wrap eddi errors and output in calls to writeln_eddierror etc and by
  default define 'writeln_eddierror is writeln'.  Also sqlte output.

o Apologise on error signal handler!

o Incorporate Antony Harfield's new AOP and EDDI.
  http://www.harfield.org.uk/project/download/ or
  agentparserHarfield2003/aop_v204
  Does it fix parsing of negative numbers?  Eg apple << ["ne", 0.20, -3];
  (causes segv on Windows July 2003)
  WMB tested with Asma 24/10/2003, gives "AOP parse error" or such like on
  Solaris...

o A Quick Reference (help menu) guide to EDDI... can base this on S V
  Truong's report.

o Error handling: make it possible to customise this.  Simplest: have
  a way of disabling errors and a way of executing a statement and
  tell if there was an error.  Then we could for example use the
  cyclic dependency checker under programmatic control.

o Show when executing RunSet by changing colour of Interrupt button (from
  disabled grey to active red?).

o Mac OS X: when executing RunSet, "ping" the activity manager (?) to prevent
  the Mac from sleeping whilst tkeden is busy.  (See Salling Clicker for
  mention of this "ping"-ing.

o ttyeden gendigraphs2.eden > outfile doesn't give an error when disk
  holding outfile fills up.  Is this ttyeden or the shell's fault?

o How to add a scroll bar to Scout screen?  Automatically if required?
  Eg AOP.

o Add Applescript for Mac OS X tkeden?  As another notation?

o IP translator synchronisation problem: if can guarantee that translator
  processes pass through % (notation change) lines unchanged, then could
  pass %input001 into translator and see when it comes out...

WMB mentioned:

  James Butcher mentioned to me today that he's interested in putting his
  jigsaw model in the repository ... apparently it works with an updated
  release of tkeden (-1.47) which he has a personal copy of.

  As far as updates for the next release of tkeden are concerned, I'd
  appreciate some way to overcome the problems introduced by Chris's math
  functions, which have such commonplace names that they conflict with
  several existing models (we discussed this before). Would having a special
  math lib that gets loaded via a special command line option, or can be
  omitted on startup in some other way, be a way forward? No doubt we
  discussed this before!

o Chris has been running into the 4K MAXTEXTLEN limit in Eden/lex.c
  when constructing the database text, where he has code of the form

  foo is "
  verrrrry long string
  ";

  Can we make the yytext buffer dynamic?

o The tkeden Donald translator generates an error when given a
  real-typed first argument... but the underlying Eden code that it is
  translated to uses %, which has no problem with this case.  (engine demo)

o Similarly, Donald translator generates an error when given something of
  the form
    int = int * real

o Document 'make pcre'...

o Build a statically-linked tkeden for Linux

o Is propagateType (a dtkeden Eden variable) documented?  Apparently
  Chris Keen wrote about it in his project writeup...

o Compile and install Tk Img package for linux-intel at DCS

o Can we do away with the "input buffer overflow" MAXTEXTLEN
  limitation, which is a problem when people generate code automatically.
    bash...
 gem$ echo "a=\"`printf "%4094c" " "`\";writeln(a#);" | ~empublic/bin/ttyeden 2>&1 | head
 1|> 4094
 2|>

 gem$ echo "a=\"`printf "%4095c" " "`\";writeln(a#);" | ~empublic/bin/ttyeden 2>&1 | head
 ^
 /dcs/emp/empublic/solaris-sparc/bin/ttyeden-1.46: error: input buffer overflow while executing file stdin near line 1, char 0:

o syntax highlighting in the input window?

o To solve the stack and heap size problems: add command line
  parameters for them (with default options being as they are) and
  allocate them once at program start time.  ... found this suggestion
  in an old Eden man page (by Edward?).

o Document the maximum length of an Eden identifier somewhere (is it 256?).

o Add uname output to DCS eden.log file to record host type

o Make readline code in ttyeden a command line option -- it seems to
  interfere with texteditorYung1987 for example.

o Obtain code for tk/tty-eden version 1.0 or just before and compile
  up if possible to give a reference point.

o "Command terminated by signal x" messages appear in DCS eden.log
  file but not on the user's terminal... ... perhaps get the Eden
  wrapper script to hang around until the Eden process terminates?

o forget should be able to take an ordered list of arguments of things
  to be forgotten.

o CYCLIC DEF : ABORTED error message is a bit strong: /what/ has been
  aborted?  Just the current statement?

o Wacky and probably not for tkeden: change to representing symbol identity
  using an inode filesystem style scheme.  Different agents can know the
  same symbol by different names (cf hard linking).  The symbol name could
  be changed without grepping through definitions (this requires that we
  don't represent script as strings a la execute).  Actually this doesn't
  quite work: perhaps we need something a bit like the Mac HFS filesystem
  where file identities are known both as a unique identifier and a textual
  name.  The problem I'm trying to solve is: be able to extend
  texteditorYung1987 by changing the cursor position ('col' and 'line' --
  let's think about just 'col') to a definition something like
    col is insert_mode ? 1 : assignTo_col

  The actual detail here is not the point but the idea that col (previously
  an integer which is assigned to) could be changed into a definition to
  extend the model definitively but that the code that assigns to it could
  be kept and used.

o Need a way of getting x-y items from a list easily.  a is b[1:2]?

o symboldetail "type" is a high-level notion of "type": it returns only
  "var" and not "string" etc.

o There isn't any way to get a list of all the ~> dependency-links
  programatically out from the symbol table in the same way that
  symboltable() can be used for procs, vars etc.  The "triggered action"
  form of representation "proc name : trigger" is not sufficient as
  built-ins etc can be triggered by change using ~> and built-ins cannot be
  defined with the triggered action representation.

o Write some Eden procedures to save the symbol table state -- rewrite the
  tkeden Save As facilities using Eden...

o Acknowledge Kernighan and Pike The UNIX programming environment in
  credits.txt.

o execute() apparently returns 0 if it failed... perhaps there should be an
  _eden_show_execute_errors option?

o Is there a fatal error function in Eden?  Perhaps we should call abort()
  in order to dump core if we are able to detect this circumstance.

o Make default Open dialog bigger

o Document Eden sasami_ functions (see Eden/builtin.c and
  Sasami/functions.c) in sasami.txt.

o View Eden definitions -> "with translated Sasami definitions" doesn't
  appear to completely work.  For example, debug(8);, then load
  sasamiexamplesCarter..../morph.s, note the creation of
  _sasami_vertex_5_x, but then look in the Eden interface and can't find
  it.

o Make version number a sum of something defined in EDEN/Tcl and something
  defined in the C code?  That way can release something with changed
  library code but still the same binary...?  Should work as long as both
  numbers are only ever incremented.

o Sasami objects seem to be numerically indexed and accessed this way
  (implying an array implementation) but the storage is actually a linked
  list, implying a loss in performance.

o tkeden on dual monitors starts every window in the middle, spanning both
  monitors :(

o Put a warning into Eden when int/int truncates the result.  Make the
  warning optional so people can turn it off if they intend truncation.

o In fact: put a configurable warning into Eden when any type changes.

o Have a slider to control speed of action execution?  ... actually to slow
  down when want to see what is happening.

o Does sqrt etc require a float?  Does this happen automatically now?

o Antony Harfield's fixes for displaying \"$;[]{} in Scout and Donald (bug
  due to Tcl interpreter) mentioned on p.50 of his report.
  ... agentparserHarfield2003/builder/special_chars_fix.e ?

o Notation switches to an unknown notation (eg %eddi before installeddi())
  should be an error.

o untitled.all should be all.script

o Update information about how/where to report bugs (no-one's ever used the
  SF bug reporter).

o writeln(symboltable()) fails with heap overflow in some models
  (apparently NEWTT, says Karl).  This stops Karl's undo working... can we
  fix this?

o project idea: DMT in Eden/Scout

o When we get a seg fault... can we try and recover?  or at least save the
  (re)definitions in the form id is blah; context / type is denoted by
  syntax used.  Donald uses [] for lines, Eden for lists.  So possibly need
  more characters... math symbols?

o Should be possible to save a presentation after having created it.
  sc(para) isn't an obvious creation though... need id is para.  Then have
  a way of modifying just parts of what was previously instantiated instead
  of having to redefine all elements.

o Duh!  Can save the 1 sec delays in IPTrans by separating writes and reads
  to/from translators.  Writes (calls into the relevant parse char by the
  notations framework) write out the single char to the external
  translator.  Reads need to operate all the time, polling the translator
  for output and error.  If there is something there, then call execute() /
  error() as appropriate.

o It should be possible to fill a variable with the names of the files in
  the current directory.  But system() just returns the exit code?  Perhaps
  add a function that returns files as a list.

o tkeden-1.53 on Linux PC in 3.16 (equuleus) gives libpng error -- is this
  due to need for the install on this machine to be sync'd with the rest?

o Hmmm.  Are Ant/Chris' parser configuration files themselves a notation
  that could be improved with the AOP?

o Put the ability to take a screen shot into tkeden to save people having
  to figure out how to do this in some other way.

o Consider using BEEP protocol (beepcore.org) for a dtkeden re-think?

o Karl mentioned a bug where tkeden can be crashed in 3 lines of Scout.

o donald.eden contains a 'parallel' func, but it is undocumented.  How many
  other undocumented Donald functions are there?

o An AOP notation for HODs?

o For Karl's drawScout...
  - symboldefinition of triggered procedures omits trigger
  - problem with redefining images in IMAGE windows (see imageCrash.hist
      file emailed 22 Nov 2004)... actually this is a bug related to
      calling ImageFile twice?, since defining the filename as a Scout
      string and then redefining that works...
  - can you forget scout windows?
  - key presses in TEXTBOX windows redefines a _TEXT_1 variable and also
    affects future calls to the appropriate get() function.  However,
    pasting text into a TEXTBOX window doesn't do either of these.
  - the variable (and get() result) representing the contents of a TEXTBOX
    window would in Karl's opinion be better initialised as "" rather than
    @.  (but would this break old models?)
  - an Eden scoutsymboldefinition function, giving the result of the Scout
    ? operator.
  - sensitive: ON + MOTION doesn't appear correctly in the Scout ? output.

- AOP builder looks good in 1.46 but not in 1.53... has something to do
  with relief changed in 1.53?  Charlie says that actually control over
  relief has been lost.

- tkeden-1.10 failed to start on Linux in James Nash's (csvpg@dcs)
  environment, and COG behaved strangely

- Link DMT and EDEN?

- debugging xoutput off in tkeden-1.53?

- 1.53 appears to be missing the debug() function... ?!

- delay on SEGV on UNIX as well as Windows?  ([some?] AOP bugs result in
  errors that display in the error window but are then followed quickly by
  a SEGV which removes all windows).

- a .tkeden-errors file for use after SEGV?  (Since -history file doesn't
  contain the full error information any more).

- EDDI crash bugs reported by Jeremy Stein email 22 Nov 2004

- "too many nested calls to Tcl_EvalObj" bug reported by Jeremy Stein 1 Nov
  2004

- running installarca(); on Linux gives
    1|> installarca();
    ipopen(): ioctl couldn't push ptem module: Invalid argument
  probably because /dcs/emp/empublic/bin/arca.trans on Linux gives
    /dcs/emp/empublic/bin/arca.trans: can't find an up to date stable
    version of arca.trans for linux-i686, sorry
  ... email from George 26 Nov 2004

- seems to be some bug on Linux where errors (possibly just EDDI errors?)
  cause a SEGV and the error window disappears too fast to be seen.
  Reproducing the bug on Solaris is the same, but without a SEGV.  Linux
  gives an error about free() -- perhaps the Solaris memory allocation is
  tolerant of some bug here.  Found this error with Charlie, and reproduced
  on the Linux machine in his office and topaz.

- "proc E : e { e++; } e=1;" crashes with heap overflow

- a "here-document" syntax for Eden.  Something like
     t=<<EOF;
     writeln("hello world");
     EOF
  instead of
     t="writeln(\"hello world\");
  ... this should make writing macros a bit easier.

- if it is too tricky to implement multiple independent Sasami displays (in
  Scout?), then how about multiple Sasami displays that all show the same
  world but with independent cameras?

- dtkeden: agent login on command line

- dtkeden: ability to change logged-in agent after login

- dtkeden: make communications mode programmatically accessible

- programmatic support for opening and closing windows, rather than the
  currently recommended tcl hack.  ... for Charlie and Karl.  Perhaps an
  Eden variable screen_open ...?

- a better application icon for Mac OS X and other platforms... there are
  some royalty-free ones at http://interfacelift.com/icons-stock/...

- improve Scout documentation to address James Nash's questions answered by
  WMB, Ant etc in CS405 Forum on 22 Dec 04.

- fgetc seems to return -1 on EOF.  This needs checking and documenting
  (and other similar cases) in eden.txt.

- seems we have a problem with the Linux binaries, since Jeremy got a large
  speedup by compiling it himself (see emprojects forum 8 Jan 2005).  Need
  to look more at how we should build and distribute this.

- PCRE -- perhaps assume a library available on people's systems now.
  Remove from distribution and write a configure check for it instead.

- when we've built a new version of tkeden, send it to Jeremy to check for
  hard disk thrashing when moving mouse over motion-sensitive Scout window
  issue (see emprojects forum 8 Jan 2005).

- include my benchmark Eden code with the distribution (in Tests?) so
  people can check for speed.

- it looks like doing an execute("%eddi\n...") changes the notation context
  in the interface -- so it seems difficult to use Eden whilst such an
  execute is running in a loop in the background...

- %edenprof -- which inserts extra lines of Eden code which capture timings
  for later analysis of EDEN performance on the given code.

- add username of building user to built executable somehow, so that it
  appears in the Help->About tkeden menu.

- mark all the releases in the change.log with the author (mostly Ashley so
  far).

- Allow anonymous functions as per Charlie's request Jan 17 2005.  Eg (very
  roughly):
    a is func { while ($1++) f=f*2; return f; }

- Implement dependency within local (auto) variables.  Charlie's example:
  be able to iterate through a string using two index pointers with a fixed
  distance between the indices -- form the value of the second index
  pointer from the value of the first by dependency.

- Add DoNaLD 'delete' command to documentation.  Are there any more
  keywords in the lexer (and in Scout etc) that need adding to the docs?

- Interactive help on aspects of tkeden: eg Dan's DoNaLD "arc" model
  demonstrated 20-Jan-2005.

- Take %edensl out of the release -- this should be a separate project.



START From my "edenpending" mail folder, mails 17/05/2001 - 23/02/2003

- " %eden" (etc) with a leading space fails.  Makes it awkward to paste
  things in sometimes.

- Ant mailed two problematic test cases on 28 October 2002.

- "proc" inside a proc doesn't seem to cause an error, meaning that missing
  brackets can cause much confusion.  WMB mailed a test case on 4 November
  2002.

- window_mousePos_x is in local coordinates?  Would be helpful to have
  global coordinates to allow implementation of icon drags by dependency etc.

- Lattice model problems discovered by Liane, ref WMB's mails 10 Nov 2002.

- Using DoNaLD rot on a rectangle rotates the two corners, keeping them the
  same distance from the central point, as opposed to actually rotating
  rectangle -- according to Jon McHale 17 Nov 2002.

- Some problem to do with TEXTBOXES: Alison Cronick mailed 2 Dec 2002.
  Problem description might be contained in the model she mailed?

- Henry Southgate reported problems with attributes of DoNaLD shapes
  when reused in an openshape?  See WMB mails 11 Dec 2002.

- Ant Harfield gave an improved scout_textbox_set_string in mail which
  I replied to on 27 February 2003.

END From my "edenpending" mail folder, mails 17/05/2001 - 23/02/2003



- A point from Charlie about symboldetail... for var type, the
  third element of the output would ideally contain the current value,
  rather than empty string. Also we could consider changing "var" to "="
  and "formula" to "is" -- then the list can be read by a human more
  easily :)

- Rename all built-in functions to _eden_builtin_foo and then add Eden
  wrappers... allows people to change built-ins later.  Hmm -- what about
  the case of two people independently customising a builtin?

- EDEN icon: eg similar to Core Image / Audio / Video icons at
  http://arstechnica.com/reviews/os/macosx-10.4.ars/16  ?

- Can't do File->Open successfully to a file within a directory with a
  space in the name.  Looks to be because the Tk file browser command in
  edenio.tcl is giving a space-separated (?) list of files.

- installeddi should do nothing the second time it is invoked

- Get sysadmin to put symlinks to tkeden in the PATH?  This doesn't provide
  the ability to reference all the older versions of tkeden though...

- In main() in main.c, we are relying on the cwd to set the TCL_LIBRARY
  env var on Windows, even if the -l argument is given.  Eric was using
  the VEL on his Windows laptop and this was a problem.  Perhaps we should
  set TCL_LIBRARY from -l if it was given on WIndows.

- Use Rendezvous (now Bonjour) to discover dtkeden servers on the subnet?
  http://wiki.tcl.tk/13722

- Seems dtkeden has no checking on the -c argument: "-c scenedit.e" is
  happily accepted!
  
- Tab completion on variable names in the Input Window

- Rename _tkeden_showxoutput to tkeden_show_xoutput (for consistency
  with other similar variables) and put triggered procedure in to print a
  notice if someone redefines the original name.

- DoNaLD Quick Reference needs some examples.

- The FAQ documentation about accessing DoNaLD, SCOUT (etc) namespaces from
  Eden and vice-versa should be in the Eden Quick Reference.

- Is the tool consistent with my (relatively recent) usage of Eden/EDEN?

- A command line option for tkeden which prevents loading of edenio.tcl:
  no default UI, useful for presenting applications, and also useful for
  tkeden-as-server applications.

- Quick References should just be "Sasami Help" etc

- Remove Win32 port version number.

- Refactor version number headers: they should be EDEN_, not TKEDEN_,
  since they are present in ttyeden also, although the Tcl variables
  should stay as _tkeden...

- Make a file with reproducable problems for people to kill off one by one

- For all occurrances of p1 (and p0) in eddi.eden, rename to EDDIp1 etc
  to avoid overwriting people's DoNaLD constructions where they frequently
  use p0/p1.

- Can we display musical flat/sharp glyphs in text somehow?

- IPT 1 second pause problem.  The solution might also involve one of the
  other problems here.  Perhaps define that ##* is an automatically generated
  comment.  Follow by some unique identifier.  Then use those comments to
  denote end of input given to a translator.  Translators must pass such
  comments through unmodified, so that Eden can tell when they have finished
  their (asynchronous) work.  Also use auto-generated comments to indicate
  the input as originally given by the user, in some definitive notation.
  Then require the translators to output that comment, followed by the
  relevant Eden output.  This allows us to match up original input to
  translated lower level version.  The original input can then be stored by
  Eden for use in View Definitions (which would then operate on any notation)
  and we could show corresponding Eden definitions for each original input
  with a disclosure triangle.  Still need to think this out fully though:
  what if a translator (say %donald2) generates output for another
  translator (say %donald)?

- svnversion rule in the Makefile should behave OK if the source is not
  a working copy and also if svnversion is not installed.

- planimeterCare2005 (at least the one that Charlie gave me 25 May 2005)
  has two problems:
    - The Apple Shark tool shows that the call stack grows ever larger
      whilst we move the mouse over the input table (the planimeter in the
      Sasami window following).  Appears to be a problem with checkRunStack
      combined with sensitive:MOTION.
    - 80% of tkeden's CPU time is going on sa_findvertex.  Tried using
      gcc "-falign-loops=16" option as suggested by Shark to align the loop
      in sa_findvertex, but only reduced the total to 79% ish.

- On the Mac, can only run one copy of tkeden at once.  This will prevent
  us running multiple copies of dtkeden, say.  Ah -- we can run multiple
  copies from the command line.

- Document undocumented commands in Sasami.  "dump_vertices" command is one.

- Might need some of the Windows cwd hacks on Mac OS too... running
  tkeden dir1/dir2/Run.e on the command line results in Run.e not being
  able to find files in dir2.

- After having loaded EDEN, include anything (well -- not quite everything:
  need to think about this) in the user's ~/.tkeden-extensions directory.  Eg
  for extending EDEN with drawSCOUT etc.

- Russell and Charlie's patch for sensitive:MOTION + history file performance
  problem (caused by syncing to disk) on Windows.

- Make it possible to drag text files into the Input Window.

