Squeak-dev April 2011

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80 participants
387 discussions

Daily Commit Log
by commits＠source.squeak.org 04 Apr '11

04 Apr '11

Changes to Trunk (http://source.squeak.org/trunk.html) in the last 24 hours: http://lists.squeakfoundation.org/pipermail/packages/2011-April/004485.html Name: Compiler-ul.206 Ancestors: Compiler-nice.205 - fixed Scanner's comment - removed unsent obsolete method from Scanner - refactored Scanner >> #scanLitWord a bit - changed the postscript to recompile the senders of #repeat, just in case someone has broken methods =============================================

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[ELECTION] The Squeak Oversight Board Election 2011 is now started
by Göran Krampe 03 Apr '11

03 Apr '11

...which means that the 460 authorized voters will receive ballots in the next few hours. If you feel you should have received a ballot (and didn't get one) - send email to voters(a)squeak.org and make it known and I will see what I can do. Please first check spam filter. The ballot has subject line: "Poll: Squeak Oversight Board Election 2011" ...and is sent from goran(a)krampe.se. regards, Göran

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cool video :-)
by Michael Haupt 03 Apr '11

03 Apr '11

... the Blit terminal: http://www.ispyce.com/2011/04/video-explains-multitasking-and-user.html

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Election campaign and a vision of the future of Squeak part 1
by Merik Voswinkel 03 Apr '11

03 Apr '11

Hi Squeakers, Several people asked for a vision on the future of Squeak and some campaigning on current Squeak issues. I'll attempt to start that with a first post about my own views and I invite everyone to engage in a discussion. There should always be an official Squeak in my opinion. The board exists to represent the official Squeak release and the community behind it. The Squeak Oversight Board is elected from among a subset of registered that read and post on the Squeak-dev mailing list with the purpose of representing the people. The Board currently releases the official versions, coordinates some trunk development, protects the Squeak name, manages the web hosting, the domain names, arranges the license, receives funding and correspondence, represents Squeak to other organizations and could make deals with others. The board has not much power and no way to make things happen beyond convincing us readers to volunteer our time. I think that this limited power and scope is appropriate for the Board. I think that this limited role for the board is good. If people would want to make the Squeak Oversight Board into an organization with more powers or return to the days of Squeak Central, I think we need a long and wide discussion beyond the mailing lists scope before we start voting on such issues. If others want to make Squeak into a big successful development project like Linux or OLPC even more discussions and careful thought needs to take place before I would agree to support such a big change. In the many years we have seen the results of Squeak forks by other types of organizations like a vocal group of strong individuals, user groups, science institutes, universities and companies with varying success. The Open source Squeak community and it's board should be careful before abandoning the current arrangement where everyone can vote with there actions on what should happen. The people on this list, approximately 1400 subscribers, are only of subset of active developers of Squeak and only a fraction of Squeaks users. I think that we can safely say that the Squeak community is much larger then the 460 voters on this list. I estimate over half a million Squeakers if you include casual endusers of the Scratch, Etoys, OLPC en other communities. If you define even more loosely, Squeak is the current open source version and descendant of Smalltalk, with a 43 year history going back to 1972 at Xerox PARC and to Alan Kay's Dynabook from 1968. I foremost want to represent the wants, needs and opinions of this larger group of Squeak users, by definition not the people who can vote. I actually believe that most voters, mostly active programmers and developers, have the same needs and wants. We voters just have a few more needs as developers and power users. I am personally convinced that Squeak and is successors can have a big impact on the future of the internet and the entire computing landscape if we choose to make it happen. I think that with our combined effort, we can bring Squeak to everyone on the planet in the next decade. I have been called a dreamer because of this and I am proud of it. If you at first do not dream about a better future Squeak, you can not even begin to define and build it, let alone make it a reality. To me personally, a much evolved version of Squeak has the potential to replace Windows, iOS/Mac OS X and the Linux/BSD/Android computing platforms. With a mature Lively Kernel/Clamato/Advocado we can redefine the World Wide Web and a mature Croquet/OpenCobalt we can redefine the internet user interface entirely. The best platform to evolve and redefine users interfaces like kinect, multitouch, speech and other 'natural user interfaces' is also Squeak, especially some evolved Morphic. The best way to move to such a future is to 'make something people want'. That does not mean 'make something the Squeak developers want' or even 'what people say they want'. In my opinion we can define on this list what we think what 'people want' and with that as a start, design a development roadmap and then actually make 'something people want'. But the Squeak Oversight Board is only here to facilitate such an effort, not to make it happen. My second post will contain my personal vision on the future of Squeak. Or dreamy weird ideas as some call them. Please all vote! Cheers, Merik

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[ELECTION] Sorry for the delays... and also - final call for voters!
by Göran Krampe 03 Apr '11

03 Apr '11

Hi all! I have been skiing with the family, sorry for forgetting to check for more candidates. The election will begin within an hour or so, putting my 2-year old to bed took more time than expected. And this is your absolutely last chance to get voting rights - unless you voted last year. You have approximately 30 minutes to email me or grab me on IRC (gokr at #squeak). regards, Göran

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encouraging the ACM to provide some Mac pages templates
by Eliot Miranda 03 Apr '11

03 Apr '11

Hi All, I've just seen Theo's call for papers for the Dynamic Languages Symposium in October and I'm going to write a paper on Cog. Alas I see that the ACM has yet to provide any templates other that for Word and LaTeX. I'm a fan of Apple's Pages word processor for Mac OS X, part of their iWork suite, as I'm sure many of you are. Anyway, I have this morning contacted the ACM's Electronic Publishing Manager, Gerald Murray, and he has asked me to send him an email asking for such a template. He can't make the decision on his own but has agreed to submit the request higher up the chain, and as we discussed it would help if I could add additional voices in support. So if you are interested in a Pages ACM paper template or you're interested in other researchers having access to the same please reply to this email, indicating whether you're an ACM member or not, and whether you've submitted a paper or three beforehand, and I'll add your name and email address to my submission. Also feel free to spread this request far and wide to other Mac-centric folk who would be interested. I'll send the email on Monday, April 4th. And just so you're sure, this is /not/ an April Fool. AdvThanksance. best Eliot

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http://www.mirandabanda.org/files/Cog/VM/VM.r2378/
by Eliot Miranda 03 Apr '11

03 Apr '11

Hi All, these fix the recent FFI bug and revert the HostWindowPlugin and SoundPlugin to the trunk VMs (away from the Teleplace versions). http://www.mirandabanda.org/files/Cog/VM/VM.r2378/ enjoy. Eliot

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Search Engine for Smalltalk Codes
by Zhe-Xi Lim 03 Apr '11

03 Apr '11

Hi, I am planning to implement a search engine just like Google to ease the searching of smalltalk codes in Squeak. The current available search in Squeak has drawbacks in the sense that it goes by the conventional way of information retrieval. I would like to index all the classes, comments and methods in Squeak image to provide an intelligent, faster and efficient way of searching facility in Squeak. This will also help in promoting codes re-usability in the development of Smalltalk. And then I would like to know if there is a search engine or information retrieval algorithms written in Smalltalk that already made available. If there is such a routine in Smalltalk, could anyone show it to me so that redundant work can be avoided? Thanks. Regards, Zhe-Xi -- View this message in context: http://forum.world.st/Search-Engine-for-Smalltalk-Codes-tp3168673p3168673.h… Sent from the Squeak - Dev mailing list archive at Nabble.com.

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inlining repeat and the decompiler (Compiler-nice.186)
by Eliot Miranda 03 Apr '11

03 Apr '11

Hi All, just a note that once Compiler-nice.186 is installed, which inlines #repeat, one needs to recompile all senders of repeat to avoid having the decompiler crap out on you, e.g. in the debugger. For example the compilation of GeneratorTest methods for generators fibonacciSequence "Yields an infinite sequence of fibonacci numbers." ^ Generator on: [ :generator | | a b | a := 0. b := 1. [ a := b + (b := a). generator yield: a ] repeat ] with non-inlined repeat: pushLit: Generator closureNumCopied: 0 numArgs: 1 bytes 34 to 72 pushConstant: nil push: (Array new: 2) popIntoTemp: 1 pushConstant: 0 popIntoTemp: 0 inVectorAt: 1 pushConstant: 1 popIntoTemp: 1 inVectorAt: 1 pushTemp: 0 pushTemp: 1 closureNumCopied: 2 numArgs: 0 bytes 52 to 70 pushTemp: 1 inVectorAt: 1 pushTemp: 0 inVectorAt: 1 storeIntoTemp: 1 inVectorAt: 1 send: #+ (1 arg) popIntoTemp: 0 inVectorAt: 1 pushTemp: 0 pushTemp: 0 inVectorAt: 1 send: #yield: (1 arg) blockReturn send: #repeat (0 args) blockReturn send: #on: (1 arg) returnTop with inlined repeat: pushLit: Generator closureNumCopied: 0 numArgs: 1 bytes 34 to 53 pushConstant: nil pushConstant: nil pushConstant: 0 popIntoTemp: 1 pushConstant: 1 popIntoTemp: 2 L1: pushTemp: 2 pushTemp: 1 storeIntoTemp: 2 send: #+ (1 arg) popIntoTemp: 1 pushTemp: 0 pushTemp: 1 send: #yield: (1 arg) pop jumpTo: L1 pushConstant: nil blockReturn send: #on: (1 arg) returnTop will cause the decompiler to fail horribly if the non-inlined result is decompiled with Compiler-nice.186 installed. The fix is merely to recompile it (and other senders of #repeat). The underlying problem is that if the is given temp names via a schematicTempNamesString then that string must match the temps in the method, and in the above if repeat is not inlined a and b are remote, and hence the schematicTempNamesString is [generator (a b)] but if repeat is inlined then they are local and the schematicTempNamesString is [generator a b]. BTW, kudos to Nicholas for the newParser/newCompiler changes! best Eliot

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The Trunk: Compiler-ul.206.mcz
by commits＠source.squeak.org 03 Apr '11

03 Apr '11

Levente Uzonyi uploaded a new version of Compiler to project The Trunk: http://source.squeak.org/trunk/Compiler-ul.206.mcz ==================== Summary ==================== Name: Compiler-ul.206 Author: ul Time: 3 April 2011, 2:18:08.993 am UUID: 8cf4ce89-32f6-f04c-bbd5-8cb82cce271f Ancestors: Compiler-nice.205 - fixed Scanner's comment - removed unsent obsolete method from Scanner - refactored Scanner >> #scanLitWord a bit - changed the postscript to recompile the senders of #repeat, just in case someone has broken methods =============== Diff against Compiler-nice.205 =============== Item was changed: Object subclass: #Scanner instanceVariableNames: 'source mark hereChar aheadChar token tokenType currentComment buffer typeTable' classVariableNames: 'AllowUnderscoreAssignments AllowUnderscoreSelectors DoItCharacter TypeTable' poolDictionaries: '' category: 'Compiler-Kernel'! + !Scanner commentStamp: 'ul 4/3/2011 02:04' prior: 0! - !Scanner commentStamp: 'ul 3/27/2011 23:24' prior: 0! I scan a string or text, picking out Smalltalk syntactic tokens. I look one character ahead. I put each token found into the instance variable, token, and its type (a Symbol) into the variable, tokenType. At the end of the input stream, I pretend to see an endless sequence of special characters called doIts. Instance Variables aheadChar: <Character> buffer: <WriteStream> currentComment: <OrderedCollection> hereChar: <Character> mark: <Integer> source: <ReadStream> token: <Symbol|String|NumberCharacter|Boolean|nil> tokenType: <Symbol> typeTable: <Array> aheadChar - the next character in the input stream buffer - a reusable WriteStream on a String which is used for building strings. Shouldn't be used from multiple methods without resetting. currentComment - an OrderedCollection of strings which contain all comments between the current token and the previous token or the beginning of the source. hereChar - the current character mark - the position of the current token in the source stream source + - the input stream of characters - - xxxxx token - the current token tokenType - the type of the current token. The possible token types are: #binary, #character, #colon, #doIt, #keyword, #leftArrow, #leftBrace, #leftBracket, #leftParenthesis, #literal, #period, #rightBrace, #rightBracket, #rightParenthesis, #semicolon, #string, #upArrow, #verticalBar, #word, #xBinary, #xColon, #xDelimiter, #xDigit, #xDollar, #xDoubleQuote, #xLetter, #xLitQuote, #xSingleQuote, #xUnderscore typeTable - an array that maps each an evaluable tokenType to each character with asciiValue between 0 and 255! Item was removed: - ----- Method: Scanner>>checkpoint (in category 'expression types') ----- - checkpoint - "Return a copy of all changeable state. See revertToCheckpoint:" - - ^ {self clone. source clone. currentComment copy}! Item was removed: - ----- Method: Scanner>>errorMultibyteCharacter (in category 'error handling') ----- - errorMultibyteCharacter - - self error: 'multi-byte character is found at unexpected place'. - ! Item was removed: - ----- Method: Scanner>>nextLiteral (in category 'expression types') ----- - nextLiteral - "Same as advance, but -4 comes back as a number instead of two tokens" - - | prevToken | - prevToken := self advance. - (prevToken == #- and: [token isKindOf: Number]) - ifTrue: - [^self advance negated]. - ^prevToken! Item was removed: - ----- Method: Scanner>>revertToCheckpoint: (in category 'expression types') ----- - revertToCheckpoint: checkpoint - "Revert to the state when checkpoint was made." - - | myCopy | - myCopy := checkpoint first. - 1 to: self class instSize do: - [:i | self instVarAt: i put: (myCopy instVarAt: i)]. - source := checkpoint second. - currentComment := checkpoint third! Item was changed: ----- Method: Scanner>>scanLitWord (in category 'expression types') ----- scanLitWord "Accumulate keywords and asSymbol the result." + token := (String streamContents: [ :stream | + stream nextPutAll: token. + [ (self typeTableAt: hereChar) == #xLetter ] whileTrue: [ - | t | - [(self typeTableAt: hereChar) == #xLetter] - whileTrue: - [t := token. self xLetter. + stream nextPutAll: token ] ]) asSymbol! - token := t , token]. - token := token asSymbol! Item was changed: (PackageInfo named: 'Compiler') postscript: '"Recompile methods which send #repeat." + CurrentReadOnlySourceFiles cacheDuring: [ + (SystemNavigation default allCallsOn: #repeat) do: [ :methodReference | + methodReference actualClass recompile: methodReference selector ] ]'! - (SystemNavigation default allCallsOn: #repeat) do: [ :each | - each actualClass recompile: each selector ].'!

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