Squeak-dev October 2011

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160 discussions

Daily Commit Log
by commits＠source.squeak.org 29 Oct '11

29 Oct '11

Changes to Trunk (http://source.squeak.org/trunk.html) in the last 24 hours: http://lists.squeakfoundation.org/pipermail/packages/2011-October/005048.ht… Name: Network-mtf.120 Ancestors: Network-tonyg.119 added convenience methods for printing the address of a socket =============================================

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Squeak on Google Native Client
by Yoshiki Ohshima 28 Oct '11

28 Oct '11

I updated Squeak on Native Client a bit. As its API got more stable a fairly recent version of Google Chrome should be able to run it. You can enable Native Client by going to about:flags and about:plugins and then point it to: http://tinlizzie.org/~ohshima/squeak to run it. This time, I wrote a simple bridge between JavaScript and Squeak. Get the halo for the blue steering wheel and rotate it by the blue handle at bottom left. You see the value in the text field at the very bottom changes. If you type i a number in the form above that and hit th button by it, you can change the Car's turn. -- Yoshiki

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The Trunk: Network-mtf.120.mcz
by commits＠source.squeak.org 28 Oct '11

28 Oct '11

Matthew Fulmer uploaded a new version of Network to project The Trunk: http://source.squeak.org/trunk/Network-mtf.120.mcz ==================== Summary ==================== Name: Network-mtf.120 Author: mtf Time: 28 October 2011, 12:31:11.023 am UUID: 899b135e-f4e5-4b9c-b920-34d40dbb8817 Ancestors: Network-tonyg.119 added convenience methods for printing the address of a socket =============== Diff against Network-tonyg.119 =============== Item was added: + ----- Method: Socket>>localAddressPortString (in category 'accessing') ----- + localAddressPortString + ^ self localAddressString, ':', self localPort printString! Item was added: + ----- Method: Socket>>localAddressString (in category 'accessing') ----- + localAddressString + ^ NetNameResolver stringFromAddress: self localAddress! Item was added: + ----- Method: Socket>>remoteAddressPortString (in category 'accessing') ----- + remoteAddressPortString + ^ self remoteAddressString, ':', self remotePort printString! Item was added: + ----- Method: Socket>>remoteAddressString (in category 'accessing') ----- + remoteAddressString + ^ NetNameResolver stringFromAddress: self remoteAddress!

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Re: [squeak-dev] Is it possible to install squeak here?
by Bert Freudenberg 26 Oct '11

26 Oct '11

Hehe, so some things *are* simple ;) Yay for the Linux package maintainers! - Bert - On 26.10.2011, at 17:04, Erlis Vidal wrote: > I went to the Debian website you sent me and there I read a note recommending using aptitude which I did and squeak was available, so aptitude did the job. > > > > On Wed, Oct 26, 2011 at 10:47 AM, Bert Freudenberg <bert(a)freudenbergs.de> wrote: > Great! Can you tell us which VM you ended up using? > > - Bert - > > On 26.10.2011, at 12:56, Erlis Vidal wrote: > >> Hi Bert, >> >> Thanks!! I have squek running now! >> >> On Tue, Oct 25, 2011 at 4:43 PM, Erlis Vidal <erlis(a)erlisvidal.com> wrote: >> Thanks Bert, I'll try :) >> >> On Tue, Oct 25, 2011 at 3:56 PM, Bert Freudenberg <bert(a)freudenbergs.de> wrote: >> >> On 25.10.2011, at 21:10, Erlis Vidal wrote: >> >> > Hi, >> > >> > I've just received my Efika MX51 http://www.genesi-usa.com/products/smartbook I was just wondering if I can install squeak here. It uses Ubuntu, but the processor is ARM. I wasn't able to find a VM in the squeak website. >> >> Squeak.org does not have precompiled VMs for ARM currently. But Debian does: >> >> http://packages.debian.org/search?keywords=squeak-vm >> >> These should work on Ubuntu, hopefully. >> >> I know Fedora has an ARM VM rpm, I used it on the XO-1.75. Works fine. >> >> If all else fails, you can compile one from source: >> >> http://squeakvm.org/unix/ >> >> - Bert - >> >> >> >> >> >> > >

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Is it possible to install squeak here?
by Erlis Vidal 26 Oct '11

26 Oct '11

Hi, I've just received my Efika MX51 http://www.genesi-usa.com/products/smartbook I was just wondering if I can install squeak here. It uses Ubuntu, but the processor is ARM. I wasn't able to find a VM in the squeak website. I'm ok with any smalltalk dialect ... thanks Erlis

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Daily Commit Log
by commits＠source.squeak.org 25 Oct '11

25 Oct '11

Changes to Trunk (http://source.squeak.org/trunk.html) in the last 24 hours: http://lists.squeakfoundation.org/pipermail/packages/2011-October/005046.ht… Name: Compiler-nice.219 Ancestors: Compiler-nice.218 Let a binary selector be composed of vertical bars. Since st80, such selector were not composed at scan time because of ambiguity with empty temporaries spec || and latter with temporaries in a block of arity >0 like ^[:e|| tmp | tmp := e] But a hack in the Parser did authorize a single #| as a valid binary. Since - we can unambiguously extend this hack easily, - ANSI seems to tell it's a valid binary character in a binary selector, - I never saw any grammar definition explicitely forbidding this, Let's just do it. ============================================= http://lists.squeakfoundation.org/pipermail/packages/2011-October/005047.ht… Name: Tests-nice.133 Ancestors: Tests-eem.132 Add tests for binary selectors with vertical bar =============================================

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test ignore
by Lawson English 25 Oct '11

25 Oct '11

list has been very quiet. Just trying to see if I'm getting messages in or out. L.

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The Trunk: Tests-nice.133.mcz
by commits＠source.squeak.org 24 Oct '11

24 Oct '11

Nicolas Cellier uploaded a new version of Tests to project The Trunk: http://source.squeak.org/trunk/Tests-nice.133.mcz ==================== Summary ==================== Name: Tests-nice.133 Author: nice Time: 24 October 2011, 7:17:16.796 pm UUID: a5694376-8adb-f749-91dd-ba749f1a7f54 Ancestors: Tests-eem.132 Add tests for binary selectors with vertical bar =============== Diff against Tests-eem.132 =============== Item was added: + ----- Method: CompilerTest>>testBinarySelectorWithBar (in category 'syntax') ----- + testBinarySelectorWithBar + "Acknowledge the fact that $| is now allowed at any place in a binary selector" + + #(#'||' #'|||' #'|||++' #'<|>') do: [:selector | | source tree | + source := ('1 ' , selector , ' 2') readStream. + tree := (Compiler new) + from: source class: Object context: nil notifying: nil; + translate: source noPattern: true ifFail: [nil]. + self assert: tree notNil. + + "Hem, this test is really ugly..." + self assert: tree block statements first expr selector key = selector].! Item was added: + ----- Method: CompilerTest>>testEmptyTemporaries (in category 'syntax') ----- + testEmptyTemporaries + self assert: (Compiler evaluate: '||') isNil! Item was added: + ----- Method: CompilerTest>>testInvalidVerticalBarSelector (in category 'syntax') ----- + testInvalidVerticalBarSelector + self should: [Compiler evaluate: '1 | | 2'] raise: SyntaxErrorNotification. + self should: [Compiler evaluate: '1 | - 2'] raise: SyntaxErrorNotification.! Item was added: + ----- Method: CompilerTest>>testLocalTemporariesInABlock (in category 'syntax') ----- + testLocalTemporariesInABlock + self assert: ((Compiler evaluate: '[:x|| tmp | tmp := x]') value: 2) = 2!

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The Trunk: Compiler-nice.219.mcz
by commits＠source.squeak.org 24 Oct '11

24 Oct '11

Nicolas Cellier uploaded a new version of Compiler to project The Trunk: http://source.squeak.org/trunk/Compiler-nice.219.mcz ==================== Summary ==================== Name: Compiler-nice.219 Author: nice Time: 24 October 2011, 6:52:05.789 pm UUID: 871ffcae-841f-194e-ab14-0a7a493df385 Ancestors: Compiler-nice.218 Let a binary selector be composed of vertical bars. Since st80, such selector were not composed at scan time because of ambiguity with empty temporaries spec || and latter with temporaries in a block of arity >0 like ^[:e|| tmp | tmp := e] But a hack in the Parser did authorize a single #| as a valid binary. Since - we can unambiguously extend this hack easily, - ANSI seems to tell it's a valid binary character in a binary selector, - I never saw any grammar definition explicitely forbidding this, Let's just do it. =============== Diff against Compiler-nice.218 =============== Item was changed: ----- Method: Parser>>messagePart:repeat: (in category 'expression types') ----- messagePart: level repeat: repeat | start receiver selector args precedence words keywordStart | [receiver := parseNode. (hereType == #keyword and: [level >= 3]) ifTrue: [start := self startOfNextToken. selector := WriteStream on: (String new: 32). args := OrderedCollection new. words := OrderedCollection new. [hereType == #keyword] whileTrue: [keywordStart := self startOfNextToken + requestorOffset. selector nextPutAll: self advance. words addLast: (keywordStart to: self endOfLastToken + requestorOffset). self primaryExpression ifFalse: [^self expected: 'Argument']. self messagePart: 2 repeat: true. args addLast: parseNode]. (Symbol hasInterned: selector contents ifTrue: [ :sym | selector := sym]) ifFalse: [ selector := self correctSelector: selector contents wordIntervals: words exprInterval: (start to: self endOfLastToken) ifAbort: [ ^ self fail ] ]. precedence := 3] + ifFalse: [ + (level >= 2 and: [hereType == #verticalBar]) ifTrue: [self transformAVerticalBarIntoABinarySelector]. + (hereType == #binary and: [level >= 2]) - ifFalse: [((hereType == #binary or: [hereType == #verticalBar]) - and: [level >= 2]) ifTrue: [start := self startOfNextToken. selector := self advance asOctetString asSymbol. self primaryExpression ifFalse: [^self expected: 'Argument']. self messagePart: 1 repeat: true. args := Array with: parseNode. precedence := 2] ifFalse: [hereType == #word ifTrue: [start := self startOfNextToken. selector := self advance. args := #(). words := OrderedCollection with: (start + requestorOffset to: self endOfLastToken + requestorOffset). (Symbol hasInterned: selector ifTrue: [ :sym | selector := sym]) ifFalse: [ selector := self correctSelector: selector wordIntervals: words exprInterval: (start to: self endOfLastToken) ifAbort: [ ^ self fail ] ]. precedence := 1] ifFalse: [^args notNil]]]. parseNode := MessageNode new receiver: receiver selector: selector arguments: args precedence: precedence from: encoder sourceRange: (start to: self endOfLastToken). repeat] whileTrue: []. ^true! Item was added: + ----- Method: Parser>>transformAVerticalBarIntoABinarySelector (in category 'scanning') ----- + transformAVerticalBarIntoABinarySelector + "Transform a vertical bar into a binary selector. + Eventually aggregate a serie of immediately following vertical bars and a binary selector. + Note that this aggregation cannot occur at scan time, because a pair of vertical bars can be encountered in two valid constructs: + - either as an empty temporaries specification, + - or as a local temporaries specification in a block of arity > 0" + here := '|'. + hereType := #binary. + [tokenType == #verticalBar and: [hereMark + here size = mark]] + whileTrue: [ + here := here , $|. + hereEnd := hereEnd + 1. + self scanToken]. + (tokenType == #binary and: [hereMark + here size = mark]) + ifTrue: [ + here := here asString , token. + hereType := #binary. + hereEnd := hereEnd + token size. + self scanToken].! Item was changed: ----- Method: Scanner>>xBinary (in category 'multi-character scans') ----- xBinary | startOfToken | tokenType := #binary. startOfToken := mark. token := String with: self step. + [(self typeTableAt: hereChar) == #xBinary or: [(self typeTableAt: hereChar) == #verticalBar]] whileTrue: - [(self typeTableAt: hereChar) == #xBinary] whileTrue: [(hereChar == $- and: [(self typeTableAt: aheadChar) == #xDigit]) ifTrue: [^self ambiguousSelector: (token , '-') inRange: (startOfToken to: source position - 1).]. token := token, (String with: self step)]. token := token asSymbol!

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What good is Notification (was: Re: [squeak-dev] The Trunk: ToolBuilder-Kernel-cmm.52.mcz)
by Chris Muller 24 Oct '11

24 Oct '11

> It's clearly a bug in Installer. I guess this fixes it: > > noProgressDuring: block > > [ block value: self ] on: ProgressInitiationException do: [ :note | > note sendNotificationsTo: [ :min :max :curr | "ignore" ] ] Oh wow sendNotificationsTo: since 2000 (blush). Ok. >> I want to catch Notifications and Warnings at the highest level, log >> them and resume. If there was a lower-handler then my high-level > > Why? Well, because the class comment for Notification says: "A Notification is an indication that something interesting has occurred. If it is not handled, it will pass by without effect." and when I run a headless image, I want to know about everything "interesting" that occurs - so I was simply printing its messageText to a log and resuming. The phrase "If it is not handled" implies that it _can_ be handled. The phrase, "pass by without effect" implies a notification that isn't handled is no more useful than a simple method. > Warnings are okay, because those only inform the user about some issue that > can be ignored at own risk, but Notifications are used for all kind of stuff > that involves passing objects up and/or down the stack. Catching them > without proper handling can and will break stuff. noti resume should _always_ be a proper way to handle any kind of Notification. That's the particular contract I believe being a subclass of Notification should guarantee. ProgressInitiationException has broken that contract. > I have the feeling that you think about a Notification as an exception that > passes some information about the system and swallowing it is harmless, like > Warning or an info or notice level message in syslog. > Notifications are Exceptions with a well-defined #defaultAction. So it's > always safe to throw and not catch them. Not ever catching a notification (of any particular type) would mean it serves no purpose that couldn't have been done with a simple method (for its defaultAction behavior). Likewise, if Notification itself cannot/should-not be ever caught anywhere, then it serves no real purpose other than to be a "organizer" superclass (since no one would use it for it's defaultAction). Now that may be the case, but then what type of exceptions is it organizing? By the name Notification, it would seem to be the "type" that are meant to be resumed. So if, by swallow, you mean handle _and_ resume the Notification, then yes, that's how I think about them. I totally get some Notification sub-types require special handling - I have one I use all the time called MagmaSessionRequest so that domain-level code can signal transaction-control to the higher-level code which has access to the session. BUT it doesn't break the "contract" that I can catch it as long as I resume it: [ Transcript cr; show: 'pre-commit code'. MagmaSessionRequest signalCommit. "<--- requires special-handling to be useful" Transcript cr; show: 'post-commit code' ] on: Notification do: [ : noti | Transcript cr; show: noti messageText. noti resume ]. prints pre-commit code committing transaction post-commit code I don't think of Notifications are intended to be used in cases involving truncating execution and unwinding the stack. For that, some other subclass of Exception should be employed. That's why Notification's defaultAction surprises me very much -- it appears as useless. Someone else thought the same way I do and that's why ProgressInitiationException resulted in Installer being badly broken for over three years unnoticed -- partially because the code *looks* fine. The only way to know for sure is to look into each and every Notification see how it works. Which leads me right back to my question: If I have to look at each kind of Notification to see how it works, then someone please tell me what type of exception is this "organizing superclass" organizing? There should be some commonality to all of its subclasses, what is it? - Chris

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