Older blog entries for chromatic (starting at number 478)

Perl 6 Design Minutes for 26 May 2010

The Perl 6 design team met by phone on 26 May 2010. Larry, Allison, Patrick, Will, and chromatic attended.

Larry:

  • :() syntax is now always signature
  • we now use foofix:[...] as the general op form instead of foofix:(...)
  • refactored the sematics of:nth and:x
  • :nth() now only ever takes a monotonically increasing list
  • S03 now explains how "not-raising" works on != and ne
  • it now basically matches the intuitions of an English speaker via HOP definition of negate metaop
  • STD sometimes didn't require semi between statements
  • statement modifiers are expression terminators but not valid statement terminators
  • an unexpected statement modifier word like if could terminate one statement and start another
  • fixed up backslashes in character classes to allow \s etc and reject \u etc
  • STD was accidentally using the same lexpad for different multis
  • Cursor now treats:() on name extension as a signature always, never as a categorical
  • we shouldn't introduce the stopper for circumfix until we're in the circumfix, or we can't use the same char on both ends
  • placeholder messages error messages are now much more informative and correct
  • we now disallow use of placeholder after same variable has been used as a non-placeholder, even for an outer reference
  • renamed add_macro (which it doesn't) to add_categorical (which it does)
  • participating frequently in discussions on semantics both on irc and p6l
  • working closely with sorear++ as he brings viv closer to bootstrapping, yay!
  • soon can bootstrap past gimme5

Allison:

  • worked on Pynie this week in my limited spare time
  • one goal is to generate the parser directly from the Python grammar
  • wrote a small, lightweight PEG parser which generates a match tree from the Python 3 grammar
  • can generate a lexer directly
  • right now it creates a parse tree
  • looks similar to the match nodes of NQP-rx
  • dumps out a tree to the PIR parser
  • working on PaFo elections for next year, but trying to delegate those
  • will have more time after June 7

Will:

  • working on Perl 6 advent tests
  • many more people are doing more work than me
  • liasing with Rakudo folks for any important Parrot bugs before the Rakudo Star release
  • my current direction there is "don't break anything"

Patrick:

  • sorear added hash flattening to NQP
  • lots of work on closures in PAST and NQP
  • they properly clone
  • fixes some lexical problems
  • need to get that to work in Rakudo
  • that's tougher; Rakudo has to wrap Parrot subs
  • wrapper object needs cloning as well, along with its attributes
  • we'll add a new PAST node type to help
  • that node understands contexts
  • essentially a way to add void context optimizations to your AST
  • that solves many problems in Rakudo beyond closures
  • added a setting into NQP along with its test suite
  • not automatically loaded, but available
  • contains standard hash and array methods
  • Parrot's ops2c project uses those
  • other people can update and enhance that setting as necessary
  • NQP also has the ability to parse type names
  • NQP doesn't do anything with them yet
  • eventually they'll allow the use of multis
  • cleaning up some NQP bugs regarding lexicals and package storage of subs
  • Bruce Keeler enabled variable interpolations in regexes
  • working on some refactorings to simplify that approach
  • works in NQP and Rakudo now
  • that's a feature we've never had before
  • Rakudo's REPL now works better, thanks to sorear
  • HLLCompiler now written more in NQP as part of that
  • NQP now can do eval
  • NQP remembers lexicals in interactive mode now
  • adding that to Rakudo is more complex
  • working on that
  • pleased with the progress on #perl6

c:

  • reviewing long term plans for GC and Lorito
  • should have more time free soon

Syndicated 2010-06-20 19:40:02 from pudge

Perl 6 Design Minutes for 19 May 2010

The Perl 6 design team met by phone on 19 May 2010. Larry, Will, and chromatic attended. Patrick added his notes later.

Larry:

  • S03 makes more explicit that doctrine that ~~ topicalizes, and removes smartmatch table fossils that automatically fall out from that
  • S05 renames 'accent' to 'mark' for better Unicode conformance
  • :a and:aa changed to:m and:mm
  • S05 disrequires retroactive semantics on:samecase and:samemark
  • the method form must now explicitly add case or mark modifiers to the pattern
  • regularized mm// to ms// to avoid confusion with new:m ignoremark option
  • STD now does a bit better at diagnosing bogus ??!! constructs of various sorts
  • STD now correctly adds operators to symbol tables as subs
  • CORE.setting now has protos of all the operators so they can be recognized as subs too
  • Cursor now canonicalize operator names in the symbol table
  • btw, not quite like specced
  • STD now reads user's mind on 'Str $toto' to intuit missing declarator
  • STD now properly diagnoses a typename between routine declarator and sub name

Will:

  • working on code for Carl Masak, trying to get his poker code example running on Rakudo
  • both fun and frustrating
  • some stuff doesn't quite work yet
  • going through the Advent examples
  • adding them to spectests
  • make sure we won't regress on such public examples
  • other people are helping with that now

c:

  • will get back to editing the Rakudo book soon
  • hope to have it in print by YAPC, but no guarantee

Patrick:

  • fixed closures in NQP, as a precursor for fixing them in Rakudo
  • worked with sorear on REPL in Rakudo and PCT in general
  • ported the NQP "standard library" done by japhb++, bacek++, and many others into the nqp-rx repository and made it part of the standard build sequence for nqp and Parrot
  • decided we need a new "context sensitive" node type in PAST, will be used to create proper closures and to handle sink context
  • worked with bacek on adding better multimethod support to PAST and nqp-rx
  • discovered a problem with lexical subs in NQP being automatically entered into the package namespace (and some existing code relying on this behavior)
  • did some initial fixes to at least get things entered properly, but a complete fix may require a deprecation cycle
  • plan to review others' patches this week
  • plan to fix REPL, closures, and sink context in Rakudo (since those are currently large pain points)
  • plan to work on loops and iterators after that

Syndicated 2010-06-16 21:38:09 from pudge

Perl 6 Design Minutes for 12 May 2010

The Perl 6 design team met by phone on 12 May 2010. Larry, Allison, Patrick, and Will attended.

Larry:

  • clarified usage of brackets around infixes
  • added various 128-bit types to the spec; we might make them arbitrarily extensible via role
  • at least LLVM could support this, even to non-powers-of-two sizes
  • modernized the paleolithic grammatical category description in S02
  • STD now uses double-quote rules for interpolating @foo[] into regex
  • STD now gives better message on 1__3
  • added the specced 128-bit types to CORE.setting
  • added minmax function to CORE.setting
  • implemented circumfix:«X Y» as grammar derivation
  • currently only allows a >> inside
  • now also recognizes foofix:("\x[face]") and foofix:("\c[YOUR CHARACTER HERE]") without actually evaluating
  • playing with factoring yaml out of gimme5, since viv is not likely to go that route.
  • mostly just answered a lot of questions on irc
  • egged people on about concurrency issues

Patrick:

  • thought on handling closures properly
  • have a solution, just need some time to implement
  • discussion on changes to CodeString
  • work on compiler toolkit to avoid CodeString, using StringBuilder instead where possible, in PCT, NQP, and rakudo. Pretty easy, no downstream projects block on a deprecation issue
  • after that, lists
  • also been answering questions on interactive mode (REPL) for rakudo et al. (the issue with losing lexicals)

Allison:

  • resolved the git conversation pretty well (for Parrot's repo migration)
  • worked on a pure PEG parser (following the paper), straight PIR, single day; now self-parsing. Interesting project, is lightweight. currently has memoization, but that might not be right for us because of backtracking. With some more effort, could probably handle EBNF form (useful for python)
  • could be setup for developer status for Debian which will improve our packaging status for Debian and Ubuntu

Will:

  • Parrot CodeString performance improvements
  • we're definitely faster in branch, but some feedback from pmichaud should help us clean up the API a bit as well, look for those to hit trunk in the next few days
  • Parrot makefile deps cleanup

Syndicated 2010-06-16 01:47:02 from pudge

Perl 6 Design Minutes for 05 May 2010

The Perl 6 design team met by phone on 05 May 2010. Larry, Allison, Patrick, Will, and chromatic attended.

Larry:

  • various spec updates, some major
  • removed p5=> description because it's not supported in core
  • deleted self:sort construct because self isn't a real syntactic category
  • explained Perl patterns in terms of PEGs, and spec'ed tiebreaking rules explicitly
  • last but not least, finally purveyed the long-threatened revamp of proto to keep routine and method semantics similar
  • they all now work much more like the multiple dispatch semantics currently used by STD, where we always call the proto first
  • the proto is then always in charge of the actual multiple dispatch; it can of course delegate that
  • and the default for a null body corresponds closely to current semantics
  • in hacking news, the lexer generator mislaid any alternative that was a bare. pattern, so cursor_fate never called its alternative, oops
  • took me a long time to run that one down, because it resulted in a horrendous backtrack causing mysterious misplaced errors
  • revamped character class parsing to be more helpful and correct
  • STD now check a normal regex bracket's innards for old-school character class, and warns if found
  • added a.looks_like_cclass method to Cursor to detect most accidental uses of P5 ranges
  • some valid P6 brackets will complain, but the workarounds are easy
  • just put whitespace on both ends is one way
  • removed a few of these old-school-ish character classes from STD
  • changed:tr language to:cc language since character classes share it
  • (translation pays more attention to ordering, but the language is the same)
  • turned out parsing character classes discovered issues in STD; various character classes needed to backslash # that would otherwise be a comment
  • to that end, we now allow \# in character classes instead of misparsing as unspace
  • if we find an invalid - in a regex, we now presume we're in an old-school character class and fail with a sorry instead of a panic to give the character class code a shot at it
  • STD now uses ~ syntax for regex brackets to set $*GOAL correctly
  • cleaned up recursive panic detection; it was possible to get both false positives and negatives before
  • STD shouldn't use 'note' to emit a panic inside a suppose because that leaks the message that should be trapped
  • STD now suppresses duplicate sorry messages more correctly
  • sorry no longer uses panic in a supposition, but dies directly to throw the exception to the suppose's try block
  • STD now allows subscripts on regex variables so $x[0] isn't taken as a character class; still needs speccing

Patrick:

  • can we make them consistent?

Larry:

  • historically S05 has allowed bare arrays to mean interpolation

Patrick:

  • we've never had a working implementation of that

Larry:

  • a bare @ would be illegal

Patrick:

  • it's currently illegal

Larry:

  • you'd have to backslash it to match part of an email address
  • it's not like the @ alternations are a big deal one way or another
  • that'd be a little more consistent
  • I forced it to think of the sigil as $ than what it really is

Patrick:

  • after seeing how Jonathan et all did interpolation for quoted strings, I thought we should do the same thing in regexes

Larry:

  • STD now has a partial fix to prevent leakage of::T from role signatures
  • unfortunately, the current fix will lose signatures of file-scoped generic roles
  • this probably has to do with not knowing whether we're really going to want a new pad; unfortunately we'd have to look ahead to know that currently
  • various other minor tweaks and bug fixes in STD and Cursor

Patrick:

  • mostly responding to messages and reports
  • should be able to get back to coding full-time and online for the next week
  • plan to resolve the list and closure issues with NQP and Rakudo
  • will answer other questions and try to keep other people productive
  • planning for the Rakudo Star release on June

Allison:

  • busy with the last week of classes
  • spent most of it writing a little language with PCT
  • it was easy to use and easy to swap the stages of PCT
  • I remembered what Patrick did with LOLCODE
  • also had a discussion of source code control systems
  • next week should be more productive
  • need to work more closely with Debian packagers to get packages into Debian

Will:

  • cleaning out as many deprecations in Parrot as possible
  • trying to improve the speed of CodeString after the immutable STRINGs merge
  • bundling lots of little concats helps
  • hope to merge in an optimization branch for that by the weekend
  • want to make that faster or less memory intensive
  • may require the use of a new StringBuilder for Parrot
  • hopefully will result in a faster Rakudo build

Patrick:

  • I've never seen CodeString take a long time
  • unless you run into memory problems
  • * discussion of the StringBuilder PMC *

c:

  • still working on optimizations, particularly CodeString
  • looking at more PBC and PBC-building optimizations
  • PBC size went down dramatically and startup improved for Rakudo
  • should have that much faster for the 2.4 release
  • will poke at GC tasks starting next week

Syndicated 2010-05-10 06:07:34 from pudge

Perl 6 Design Minutes for 28 April 2010

The Perl 6 design team met by phone on 28 April 2010. Larry, Allison, Jerry, Will, and chromatic attended.

Larry:

  • caught up on a week's worth of backlog
  • made a few spec tweaks
  • discussed them with other people
  • trying to make error messages more awesome in STD
  • working on the ability to parse the insides of character classes
  • STD doesn't like parsing itself recursively there
  • need to iron out a few things
  • enum names can now be variables

Allison:

  • Debian packages ready to ship to Debian sponsors
  • putting together a list of GC tasks
  • cleaned out the existing page, have the big things listed
  • trying to decide which tasks to do first
  • doing a lot of reading and research
  • my little language project is due on Monday
  • HLLCompiler was enormously useful
  • will start working on the GC stuff next week
  • should also start a fresh pass through the ticket queue
  • added a workaround for the final remaining TT #389 bug
  • Jonathan had a test case

Will:

  • tried to focus on getting Rakudo blockers removed

c:

  • spent some time getting Rakudo to work with trunk
  • will need a Rakudo guts hacker for the last part
  • worked on the compact_string revamp branch with Vasily
  • merged now
  • that makes trunk about 12% faster than the 2.3.0 release
  • will work on a few Rakudo profiles once it works with trunk again
  • expect at least a 5% performance improvement there
  • have some other ideas, but won't do them without profiling first
  • came up with a scheme to reduce PBC size by coalescing strings
  • Peter Lobsinger is exploring that

Syndicated 2010-05-02 00:27:42 from pudge

Perl 6 Design Minutes for 21 April 2010

The Perl 6 design team met by phone on 21 April 2010. Larry, Allison, Patrick, Will, Jerry, and chromatic attended.

Larry:

  • been under the weather, so didn't get much done other than keeping up with questions
  • S05 now allows negative quantifier ranges on reversible patterns
  • S02 now defines the term now to return the current instant
  • like rand and self, it does not parse as a function, since it never takes arguments
  • we now specify what kinds of math are allowed on instants and durations
  • improved error message on attempt to use old-school backreferences in regexes
  • STD now implements the now term and several other time-related names
  • we now allow enum names to be "constant variables" so that a class enum can declare an accessor
  • thinking alot about a better unification of the semantics of protos
  • this may also solve the current ambiguity in the meaning of postfix parens
  • in any case, this is for post Rakudo *

Allison:

  • mainly worked on packaging for Debian and Ubuntu before the release
  • closed TT #389, no methods in namespaces
  • collecting thoughts on what we need next from the GC
  • we've done a lot of small cleanups
  • now we need to solve some persistent problems
  • might need to make some fundamental changes, like reducing copying
  • coming up on my final week of classes, so lots of work there coming up

Will:

  • updated a spectest
  • minor ticket wrangling in Rakudo's RT queue

Jerry:

  • GSoC will make its acceptance announcements soon
  • expect TPF will get 10 slots

Patrick:

  • reviewing Rakudo's current state
  • made a couple of minor NQP patches
  • reviewing patches, especially from Moritz and Bruce Keeler
  • should check them in, probably with some refactorings
  • hope to work on the List implementation, especially laziness and context

c:

  • fixed as much of line numbering as I found broken
  • working on branch merges
  • still looking at optimizations
  • will focus most energy this month on the sweep-free GC
  • hope to encourage other people to work on identified optimizations
  • will review Solomon Foster's Mandlebrot example, especially with regard to performance

Syndicated 2010-04-28 22:20:35 from pudge

Perl 6 Design Minutes for 14 April 2010

The Perl 6 design team met by phone on 14 April 2010. Larry, Allison, Patrick, Will, and chromatic attended.

Larry:

  • on p6l, did a bit of bikeshed paint removal with regard to hyphens vs underscores
  • S02 now explicitly disallows both whitespace and unspace in top level of an interpolation
  • per spec change, when STD is parsing an interpolation inside quotes and looking for a possible postfix, we now presume that a backslash belongs to the quotes and is not an unspace
  • in the src/perl6 directory, renamed all Perl 6.pm files to.pm6 to avoid confusion
  • this was necessary because the implementation of STD translates Perl 6 back to the corresponding Perl 5
  • the ambiguity was causing problems with tools such as NYTProf
  • Cursor.pmc now prefers.pm6 over.pm in any particular directory when searching for Perl 6 code
  • as usual lately, most of my hacking work was in improving the human interface of the parser
  • STD now distinguishes two final messages: "Parse failed" vs "Check failed"
  • STD now warns on attempts to smartmatch with True or False
  • STD now distinguishes continuable-but-fatal "sorry" messages from immediately fatal "panic" messages
  • sorry messages will eventually fail at check time
  • changed many of STD's semantic errors to use sorry messages when the parse state is not affected
  • modified moritz++'s conflict marker patch to be more like the Clang compiler's behavior
  • conflict markers now emit a "sorry" message and continues parsing one side of the conflict
  • also fixed a buglet that prevented it from processing the conflict marker if first thing in the file
  • while fixing the vws (vertical white space) rule for that, also changed it so that extra lines are now eaten with \V*\v for consistency
  • it had be using \N*\v
  • gimme5 now supports pointing to both ends of missing goal message
  • STD's "Couldn't find final..." messages now use that capability to point to both ends of the error
  • standard quotes now also use the ~ compositor to set the goal and get that behavior
  • STD will now dwim <<op>> ("Texas hypers") better even if op contains angles
  • suppressed confusing backtracking on ~<< that produced a misleading quotewords error
  • some other patches
  • CORE.setting now recognizes the 'note' function
  • gimme5 now translates note to print STDERR
  • cleaned up some unneeded locmesses
  • Actions.pm now handles prefix metaops without spewing spurious yaml dumps

Allison:

  • worked on TT #389
  • the actual fix was about two lines
  • spent a lot of time fixing tests around it
  • didn't like the original two-line fix
  • fixed it in IMCC by passing along the:nsentry flag
  • NQP-rx still depends on that feature
  • I understood from Patrick that NQP-rx doesn't need that feature
  • don't want to launch that before the 2.3 release
  • worked on a lot of smaller issues
  • worked on the Parrot Developer Virtual Summit
  • will talk about some process changes more, as there are details to work out
  • will work on GC as the next priority
  • useful for Rakudo in general and Parrot concurrency

Patrick:

  • catching up on mail and tickets
  • should get back to coding in the next couple of days

c:

  • worked on the immutable strings branch
  • need a couple of changes in the Rakudo binder
  • now it's time to convince everyone else it's a worthwhile design change
  • going to work on bugfixes
  • will try to land the constant string cache
  • otherwise, added some optimizations

Will:

  • worked on Partcl
  • fixed a Parrot bug that broke Rakudo
  • does Rakudo need TT #389 in 2.3?

Syndicated 2010-04-21 04:09:26 from pudge

Perl 6 Design Minutes for 07 April 2010

The Perl 6 design team met by phone on 07 April 2010. Larry, Allison, Patrick, Jerry, Will, and chromatic attended.

Larry:

  • clarified that object identity from WHICH may not be a mundane value type
  • instead object id's are of type ObjAt to avoid type name collisions.
  • rewrote misleading description of "thunk"
  • made some clarifications of the desired semantics of buffers
  • Buf is primarily a role for dealing compact, unsigned integer arrays in a stringy way
  • but a Buf may be instantiated with other numeric types as well.
  • removed bogus mentions of Buf8, Buf16, Buf32; only the native buf types are sized that way
  • STD now actually parses the insides of tr/// and carps about malformed ranges
  • labels are now stored symbolically as constants rather than types
  • so no coercion routine is added for the name, so it doesn't collide with the function namespace
  • labels are now constants with a unique label type to prevent confusion with ordinary constants
  • module subcompilation now reports the name of the file it's compiling
  • improved various error messages regarding foreach, !!op, $!{}, EOF, and missing punctuation after blocks

Allison:

  • worked on line number reporting in HLLs
  • no ticket to go on, no good examples
  • didn't make much progress, but didn't have much time
  • sounds like Christoph and chromatic are working on it
  • might look at TT #389

c:

  • you're welcome to it!
  • let me know if you have questions; it's close

Allison:

  • no travel plans for the next couple of months
  • should have a lot more Parrot time
  • probably time to consider another big project
  • probably GC related

Patrick:

  • updated the progress graph last night
  • up to date as of yesterday
  • Rakudo's passing over 30,000 tests, which is great

Jerry:

  • we have 27 mentors signed up for GSoC
  • a dozen student proposals have come in
  • the admission period ends Friday, so I expect at least a handful more
  • looks like a good year for proposals
  • trying to keep on track of Rakudo development
  • trying to be a go-between for Rakudo and Parrot
  • seems like it's helping Rakudo as Parrot addresses issues that come up

c:

  • Vasily and I fixed the Rakudo performance regression
  • we're going to experiment with immutable strings in a branch
  • expect some notable performance improvements there
  • also worked on the plan to fix line number reporting
  • need a test harness to help identify problems and avoid regressions
  • learned my lesson last time I worked on that....

Larry:

  • I cringe every time I hear "line numbers"
  • I like what Clang does about highlighting the arguments to functions
  • it'd be nice if we can do similar

c:

  • that'd require more changes to Parrot, but it's doable

Larry:

  • I just want people to bear it in mind

Allison:

  • there's no reason we can't have richer annotations
  • our first step is making sure the information we provide them (or they ask for) is accurate
  • is it time to have another big development meeting for Parrot?
  • the release is coming up

Jerry:

  • sounds good

Syndicated 2010-04-09 22:07:25 from pudge

Perl 6 Design Minutes for 31 March 2010

The Perl 6 design team met by phone on 31 March 2010. Larry, Allison, Patrick, Will, and chromatic attended.

Larry:

  • in SpecLand, made it clear that the brackets in pairs are not related to subscripts, but follow the corresponding fatarrow semantics
  • in particular, name extenders are just strings or list of strings, properly indicated by : or:() in most cases (this includes all operator names).
  • we now forbid name extension using the:{} keyless adverbial syntax
  • we don't need that because name extensions are really only supposed to use values, not closures
  • if we really, really, need to supply a closure as part of a name extension, we can put it in parens, as in:({}).
  • we can use that notation for supplying a closure as a first argument to a method without requiring a space between the colon and the curly, as in.map:{...}
  • people keep writing that and expecting it to work, so I thought it would be good to make it work
  • the colon is still require before the curlies, or it's a hash subscript
  • we now capitalize the Junction type again because I couldn't get people to stop capitalizing it
  • also, the native aspect of junctions is not their most salient difference from normal types
  • conjectured an Each type that autothreads lists like junctions, but is serial and lazy, and is used for its values in list context, not boolean context
  • in S05, did much cleanup of cursor semantics to reflect what STD and Rakudo actually do these days
  • retargeted the <&foo> regex assertion form to explicitly call a routine, just like always calls a method
  • a bare <foo> assertion now prefers to call a lexical function if visible, or calls as a method in current grammar if not
  • this is a compile-time distinction, not a fallback at run time
  • in code hacking, continued debugging of the backtracking transactions I added last week
  • gimme5 now sets the correct xact on || alternations
  • deleted more of the transactions that are no longer needed when building match results that are no longer hypothetical
  • a LazyMap now always passes through the first result regardless of its associated commit transaction state
  • that's because the first cursor in a lazy list always represents the current match hypothesis, not a future hypothesis that needs pruning
  • STD now parses to the new specs regarding name extensions not including:{}
  • now allow colon form of method arguments to omit the space if the next char is a left curly, which is what people seem to expect anyway
  • note that this makes the closure the first argument, not the only argument
  • STD now gives more useful error messages when user says things like 'if' as a function call (if(...) {...}), or a statement control like 'given' where one isn't expected ($x = given {...})
  • STD now properly objects to unrecognized internal regex modifiers such as:has
  • improved the message on adverbs with empty angles (:foo<>) to list some better options
  • the problem arises when people think that the angles produce a null string, when in fact they produce a Nil list
  • other malformed pairs are also better diagnosed, such as:! not followed by an identifier, or pairs with duplicate arguments
  • added a new rule that traps all warnings and errors
  • STD now uses suppose in place of custom try blocks in diagnosing such things as two terms in a row, or unexpected infixes
  • also uses suppose to soften the warning about backtick-less embedded comments by not complaining if the supposed comment eats the whole line anyway
  • put in some code to de-dup identical warnings
  • STD now includes the signature's return type (after -->) in the check for redundant 'of' types
  • did various tiny speed tweaks, fossil removals
  • started playing with how to mark sink context and pure operations
  • split out Actions.pm from viv so that it can be used by other STD-based AST builders
  • this is in preparation for propagating attributes up and down the AST such as sink context and purity
  • eventually this will result in "Useless use of" messages where appropriate, not to mention the ability to do constant folding

Allison:

  • worked on the compact_pool() function
  • split it into a series of smaller functions
  • it could use more work, but it's an improvement
  • found one possible bug
  • worked on some documentation, especially for PMC attributes

Patrick:

  • reviewed some patches to add variable handling in regexes
  • they need some changes, but the overall concept is good
  • reviewed a few other messages
  • most of my time is going toward my family
  • hope to get more time to be more active in the next couple of days, but I can't promise that yet

Will:

  • talked to Jonathan about Rakudo Star priorities
  • he's very pleased with the memory fixes
  • the next thing on his list is getting good line numbers in reported errors
  • closing tickets
  • working to get rid of the last recursive Makefile
  • may wait until after the new release, when we remove a lot of deprecated things
  • practicing my NQP skills by working on Tcl again

c:

  • worked on the Rakudo memory problems
  • Vasily and I fixed the big memory use problem
  • still some performance tuning to do there
  • wrote up tasklists for two other important performance pieces
  • will work on line numbers after we get performance back

Syndicated 2010-04-05 04:42:21 from pudge

Perl 6 Design Minutes for 24 March 2010

The Perl 6 design team met by phone on 17 March 2010. Larry, Allison, Patrick, Jerry, and chromatic attended.

Larry:

  • clarified that nearly all normal operators autothread, including === and eqv
  • specced the \| parcel parameter syntax
  • documented that R metaoperator does not change associativity
  • clarified that trusts traits do not extend to child classes, and moritz++ specced it
  • in STD, we now suppress spurious errors from badinfix lookahead (and react more accurately to bogus terms)
  • now put the error location pointer before a bad infix, not after
  • we no longer assume missing block punctuation is always semi or comma, but keep them as a suggestion
  • missing punctuation message now points before any whitespace
  • awesomified error message about no unspace in regexes to explain how to quote space or #
  • pass single coeff to radcalc to make:16<.BABEFACE> easier to allow
  • gives better message on missing ** part of radix literals
  • worked around fact that:: doesn't correctly suppress relexing of multi tokens
  • scrapped the workaround and did a complete refactor of commit point transactions; no longer uses exceptions to commit
  • instead, it walks the current commit chain to the proper commit target to disable choosers that should not choose any more options
  • commit chain aliasing and forking to make a cactus stack is now managed by cursors, mostly transparently
  • weighed in on the subject of stability domains (or lack thereof) in Rakudo *

Patrick:

  • still working on personal issues, but hope to have some resolution by Saturday
  • haven't had much time to work on Rakudo, but show up on #perl6 to give advice sometimes
  • read Larry's email to the list; it was very helpful

Allison:

  • met some interesting people at SxSW doing open source education technology
  • reviewing the roadmap
  • the GC sounds like the most important thing to work on next
  • trying to catch up from having spotty network access lately

Jerry:

  • the other Rakudo developers have started weekly planning meetings
  • Jonathan has taken the lead
  • plenty of contributors are in the meeting and offered to take on new tasks
  • Rakudo Star may have a smaller scope, but it'll still come out in Q2
  • it's nice to see that the Rakudo community continues even as Patrick has an extended absence
  • still some Parrot issues affecting Rakudo
  • PaFo hopes to have its 501(c)3 application done by summer

c:

  • bugfixes
  • minor optimizations
  • helped merge the PCC refactor branch
  • working on Rakudo memory issues (long analysis follows, partly Parrot GC and partly NQP behavior)

Syndicated 2010-03-31 21:20:11 from pudge

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