Squeak-dev March 2018

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53 participants
146 discussions

The Trunk: 45Deprecated-eem.26.mcz
by commits＠source.squeak.org 14 Mar '18

14 Mar '18

Eliot Miranda uploaded a new version of 45Deprecated to project The Trunk: http://source.squeak.org/trunk/45Deprecated-eem.26.mcz ==================== Summary ==================== Name: 45Deprecated-eem.26 Author: eem Time: 14 March 2018, 1:03:19.52478 pm UUID: 99445fb1-fe7e-4cc3-abff-ab19e1163a32 Ancestors: 45Deprecated-dtl.25 Update the alternative implementation for hasSpecialSelector:ifTrueSetByte: given the new literal scanning machinery. =============== Diff against 45Deprecated-dtl.25 =============== Item was changed: ----- Method: SystemDictionary>>hasSpecialSelector:ifTrueSetByte: (in category '*45Deprecated') ----- hasSpecialSelector: aLiteral ifTrueSetByte: aBlock + self deprecated: 'Use BytecodeEncoder class>>scanBlockOrNilForLiteral:'. - self deprecated: 'Use Smalltalk'. ^Smalltalk hasSpecialSelector: aLiteral ifTrueSetByte: aBlock!

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Call for Participation: <Programming> 2018 in Nice
by Sylvia Grewe 14 Mar '18

14 Mar '18

----------------------------------------------------------------------- <Programming> 2018 : The Art, Science, and Engineering of Programming April 9-12, 2018, Nice, France https://2018.programming-conference.org/ <https://2018.programming-conference.org> ----------------------------------------------------------------------- We are excited to welcome you to <Programming> 2018, the second edition of a young conference on everything to do with programming. It takes place at the Boscolo B4 Plaza in Nice, France on April 9-12. The <Programming> conference is closely associated with the open-access journal "The Art, Science, and Engineering of Programming". The journal's first two issues are freely accessible at http://programming-journal.org/ and form part of the conference's research track. Along with the research track, <Programming> 2018 features a program with two main keynotes, several workshops, a coding dojo, and a student research competition. *********************************************************************** Program highlights *********************************************************************** Main conference: - Keynote: "The Recurring Rainfall Problem" by Shriram Krishnamurthi - Keynote: "Static Analysis of Android Applications for Finding Bugs and Security Vulnerabilities" by Sukyoung Ryu Co-located events: - Bx 2018: Seventh International Workshop on Bidirectional Transformations, with 12 talks - MoreVMs 2018: Workshop on Modern Language Runtimes, Ecosystems, and VMs, with 9 talks - PASS 2018: Programming Across the System Stack, with 3 paper talks and two invited talks by Christa Lopes and Ludovic Henrio - PX/18: 4th Edition of the Programming Experience Workshop - ProWeb 2018: Programming Technology for the Future Web, with 4 paper talks and one invited talk by Manuel Serrano - Salon des Refusés 2018 workshop - CoCoDo 2018, Compiler Coding Dojo Social events: - Banquet at Restaurant of the Plage Beau Rivage (April 11) *********************************************************************** Registration, attendance and accommodation *********************************************************************** - You can register for <Programming> 2018 at: https://2018.programming-conference.org/attending/registration - Early registration ends soon! Please register before March 16th to obtain the early-bird discount. - More information on attending the conference is available at: https://2018.programming-conference.org/attending/reaching-the-conference - More information on accommodation is available at: https://2018.programming-conference.org/attending/accommodation <https://2018.programming-conference.org/attending/accomodation> *********************************************************************** About Nice *********************************************************************** Nice, Capital of the French Riviera, is a charming city between sea and mountains, which has a strong cultural heritage. You will discover the French gastronomy and specialities from Nice, the numerous museums (Musée Matisse, Musée des Arts Asiatiques, Musée des Beaux Arts, Musée d’Art Moderne et d’Art Contemporain (MAMAC), Musée Chagall…) and of course various places like “la promenade des Anglais” or “le Vieux Nice”. In “La Promenade des Anglais”, you may practice sports like running, roller skating or cycling, enjoy the beauty of the Meditterean Sea and spend some time on the beach. You can also walk downtown to do some shopping or just discover the city by using the Tramway which allows you to go about everywhere in Nice. There are many places to go out to enjoy your evenings in the Vieux Nice, around the harbor or downtown. ----------------------------------------------------------------------- For more information, please visit https://2018.programming-conference.org/ <https://2018.programming-conference.org> You can also find us on Twitter (twitter.com/programmingconf <http://twitter.com/programmingconf>) and Facebook (facebook.com/programmingconf <http://facebook.com/programmingconf>) Looking forward to seeing you in Nice, Manuel Serrano (General chair), Tamara Rezk (Organizing chair), Guido Salvaneschi (Program chair), Sylvia Grewe, Philipp Haller, Etienne Lozes, Stefan Marr, Minh Ngo, Tobias Pape, Yves Roudier, and Jennifer B. Sartor

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The Trunk: Compiler-eem.375.mcz
by commits＠source.squeak.org 14 Mar '18

14 Mar '18

Eliot Miranda uploaded a new version of Compiler to project The Trunk: http://source.squeak.org/trunk/Compiler-eem.375.mcz ==================== Summary ==================== Name: Compiler-eem.375 Author: eem Time: 13 March 2018, 4:26:34.000538 pm UUID: ac95b0ba-0013-4121-8cf5-70e85161add0 Ancestors: Compiler-eem.374 Provide a comprehensive literal-in-bytecode scanning scheme that works for SistaV1's Integer and Character encodings, not just the special selectors and the special pushes. =============== Diff against Compiler-eem.374 =============== Item was added: + ----- Method: BytecodeEncoder class>>scanBlockOrNilForLiteral: (in category 'scanning') ----- + scanBlockOrNilForLiteral: aLiteral + "Answer a block argument for CompiledMethod>>#scanFor: that answers + if the method refers to the literal implicitly via a special bytecode. + If the literal is not accessible via a special bytecode, answer nil. + Subclasses override as appropriate" + ^nil! Item was added: + ----- Method: EncoderForSistaV1 class>>scanBlockOrNilForLiteral: (in category 'scanning') ----- + scanBlockOrNilForLiteral: aLiteral + "Answer a block argument for CompiledMethod>>#scanFor: that answers + if the method refers to the literal implicitly via a special bytecode. + If the literal is not accessible via a special bytecode, answer nil." + | value hi lo | + "96-111 0110 iiii Send Arithmetic Message #iiii (+ - < > <= >= = ~= * / \\ @ bitShift: // bitAnd: bitOr:) + 112-119 01110 iii Send Special Message #iii + 0 (at: at:put: size next nextPut: atEnd == class)" + aLiteral isSymbol ifTrue: + [value := 96 + ((Smalltalk specialSelectors indexOf: aLiteral ifAbsent: [^nil]) // 2). + ^[:byte| byte = value]]. + "232 11101000 iiiiiiii Push Integer #iiiiiiii (+ Extend B * 256, where bbbbbbbb = sddddddd, e.g. -32768 = i=0, d=0, s=1)" + aLiteral isInteger ifTrue: + [(aLiteral between: -32768 and: 32767) ifFalse: [^nil]. + (aLiteral between: 0 and: 255) ifTrue: + [^[:b1 :b2| b1 = 232 and: [b2 = aLiteral]]]. + lo := aLiteral bitAnd: 255. + hi := (aLiteral bitShift: -8) bitAnd: 255. + ^[:b1 :b2 :b3 :b4| b1 = 16rE1 and: [b2 = hi and: [b3 = 232 and: [b4 = lo]]]]]. + "233 11101001 iiiiiiii Push Character #iiiiiiii (+ Extend B * 256)" + aLiteral isCharacter ifTrue: + [((value := aLiteral asInteger) > 65535) ifTrue: [^nil]. + (aLiteral between: 0 and: 255) ifTrue: + [^[:b1 :b2| b1 = 233 and: [b2 = value]]]. + lo := value bitAnd: 255. + hi := (value bitShift: -8) bitAnd: 255. + ^[:b1 :b2 :b3 :b4| b1 = 16rE1 and: [b2 = hi and: [b3 = 233 and: [b4 = lo]]]]]. + + "77 01001101 Push true + 78 01001110 Push false + 79 01001111 Push nil + 88-91 010110 ii Return Receiver/true/false/nil + 93 01011101 BlockReturn nil" + aLiteral == true ifTrue: + [^[:byte| byte = 77 or: [byte = 89]]]. + aLiteral == false ifTrue: + [^[:byte| byte = 78 or: [byte = 90]]]. + aLiteral == nil ifTrue: + [^[:byte| byte = 79 or: [byte = 91 or: [byte = 93]]]]. + ^nil! Item was added: + ----- Method: EncoderForV3 class>>scanBlockOrNilForLiteral: (in category 'scanning') ----- + scanBlockOrNilForLiteral: aLiteral + "Answer a block argument for CompiledMethod>>#scanFor: that answers + if the method refers to the literal implicitly via a special bytecode. + If the literal is not accessible via a special bytecode, answer nil." + | value | + "176-191 1011iiii Send Arithmetic Message #iiii + 192-207 1100iiii Send Special Message #iiii" + (aLiteral isSymbol or: [aLiteral isInteger]) ifTrue: + [value := aLiteral isSymbol + ifTrue: [176 + ((Smalltalk specialSelectors indexOf: aLiteral ifAbsent: [^nil]) // 2)] + ifFalse: [(aLiteral between: -1 and: 2) ifFalse: [^nil]. + aLiteral + 117]. + ^[:byte| byte = value]]. + "112-119 01110iii Push (receiver, true, false, nil, -1, 0, 1, 2) [iii] + 120-123 011110ii Return (receiver, true, false, nil) [ii] From Message" + aLiteral == nil ifTrue: + [^[:byte| byte = 115 or: [byte = 123]]]. + aLiteral == true ifTrue: + [^[:byte| byte = 116 or: [byte = 124]]]. + aLiteral == false ifTrue: + [^[:byte| byte = 117 or: [byte = 125]]]. + ^nil!

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Morphic Designer
by Edwin Ancaer 13 Mar '18

13 Mar '18

Hello guys, I tried to install Morphic Designer, with the command (Installer mc http: 'http://www.hpi.uni-potsdam.de/hirschfeld/squeaksource/') project: 'MetacelloRepository'; install: 'ConfigurationOfDesigner'. (Smalltalk at: #ConfigurationOfDesigner) load. that I found at https://www.hpi.uni-potsdam.de/hirschfeld/trac/SqueakCommunityProjects/wiki…. <https://www.hpi.uni-potsdam.de/hirschfeld/trac/SqueakCommunityProjects/wiki…> I get the ConnectionRefused error in the attached document: for downloading Metacello-Base-DaleHenrichs.2.mcz HTTP/1.1. I was never asked for a userid or a password. Can anybody tell me how I can find out why this connection was refused? Kind regards,

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Balance of metrics
by Chris Muller 13 Mar '18

13 Mar '18

Hi all, I would like to express the idea from the code review thread here from a positive perspective. I really love most of the micro-tweak performance changes Levente and others have made to Squeak over the years. Combined with spur and the new memory model the system became wonderfully fast and fun to use. And, with the 64-bit, powerful! As a community of expert developers, it's understandable for the metric of performance to be the top metric. However, I believe many are are also cognizant of the IDE's potential to be something with incredible potential for regular users, even directly out of the box. [1] In that vision, the class library itself has potential to be one of their primary "widgets" where, as users who may not write code but do sometimes read code and interact directly with API's, because the widget is beautifully appealing for them to read and use, it becomes another metric worth consideration. Top-Layer API -- crafted for consumption, convenience, calls the "core" API Core API -- fast, efficient (the seam between top-l and implementation) (private methods -- implementation stuff) I believe a tangible, well-crafted top-layer could be like a layer of gold for Squeak-appeal, if we wanted it to be. All we need are a little beautification of select methods, some deliberate commenting, possibly some method attribute structure and... widget think. What do you think? Is there a potential treasure of appeal, within fairly easy grasp, hidden in plain sight for Squeak? I'm interested in your thoughts. - Chris [1] -- Did the Etoys integration get done for this release? If so, are there are any easy and appropriate ways to leverage this in a "wow" way for the release?

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The Trunk: Collections-eem.784.mcz
by commits＠source.squeak.org 12 Mar '18

12 Mar '18

Eliot Miranda uploaded a new version of Collections to project The Trunk: http://source.squeak.org/trunk/Collections-eem.784.mcz ==================== Summary ==================== Name: Collections-eem.784 Author: eem Time: 9 March 2018, 5:18:51.529302 pm UUID: 1862bd2e-3307-4973-b7b1-c8f6ad8d5f53 Ancestors: Collections-ul.783 Provide more efficient implementation(s) of at:ifPresent:ifAbsent: given impending use in the Compiler. =============== Diff against Collections-ul.783 =============== Item was changed: ----- Method: Dictionary>>at:ifPresent:ifAbsent: (in category 'accessing') ----- at: key ifPresent: oneArgBlock ifAbsent: absentBlock + "Lookup the given key in the receiver. If it is present, answer the + value of evaluating the oneArgBlock with the value associated + with the key, otherwise answer the value of absentBlock." + ^(array at: (self scanFor: key)) + ifNil: [absentBlock value] + ifNotNil: [:association| oneArgBlock value: association value]! - "Lookup the given key in the receiver. If it is present, answer the value of evaluating the oneArgBlock with the value associated with the key, otherwise answer the value of absentBlock." - self at: key ifPresent:[:v| ^oneArgBlock value: v]. - ^absentBlock value! Item was added: + ----- Method: WeakIdentityDictionary>>at:ifPresent:ifAbsent: (in category 'accessing') ----- + at: key ifPresent: oneArgBlock ifAbsent: absentBlock + "Lookup the given key in the receiver. If it is present, answer the + value of evaluating the oneArgBlock with the value associated + with the key, otherwise answer the value of absentBlock." + ^(array at: (self scanFor: key)) + ifNil: [absentBlock value] + ifNotNil: + [:association| + association == vacuum + ifTrue: [absentBlock value] + ifFalse: [oneArgBlock value: association value]]!

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[Documentation] Where do I find a list of primitives implemented by the Squeak VM / Pharo VM?
by H. Hirzel 12 Mar '18

12 Mar '18

Hello Where do I find a list of primitives implemented by the Squeak VM / Pharo VM? I assume most of the primitives are the same. I found some pages [1] and [2] related to primitives on the Swiki. What I am looking for is an updated 'List of primitives of the Squeak VM' It might just contain a reference to a source file in a repo. It should answer for example: 'what does primitive 121 implement?' Regards Hannes

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Re: [squeak-dev] The Inbox: Collections-ul.564.mcz
by Chris Muller 12 Mar '18

12 Mar '18

I guess there's infinite recursion in Array's printing method too... An Array containing itself? Obviously that's a rare structure the system has never dealt with. Do you think there'll be any other traversing methods that might be affected? On Mon, Feb 3, 2014 at 7:48 AM, <commits(a)source.squeak.org> wrote: > A new version of Collections was added to project The Inbox: > http://source.squeak.org/inbox/Collections-ul.564.mcz > > ==================== Summary ==================== > > Name: Collections-ul.564 > Author: ul > Time: 3 February 2014, 2:35:36.802 pm > UUID: 4b9a37ef-df86-40a0-a0dd-8e8b2c04d4ed > Ancestors: Collections-ul.563 > > Make sure that Array >> #isLiteral won't get into an infinite recursion, even if the receiver has an recursive structure. > > =============== Diff against Collections-ul.563 =============== > > Item was changed: > ----- Method: Array>>isLiteral (in category 'testing') ----- > isLiteral > + > + ^self class == Array and: [ > + self isLiteralIfContainedBy: IdentitySet new ]! > - ^self class == Array and: [self allSatisfy: [:each | each isLiteral]]! > > Item was added: > + ----- Method: Array>>isLiteralIfContainedBy: (in category 'testing') ----- > + isLiteralIfContainedBy: parents > + " Answer whether the receiver has a literal text form recognized by the compiler. Precondition: the receiver is an instance of Array. " > + > + (parents includes: self) ifTrue: [ ^false ]. > + parents add: self. > + 1 to: self size do: [ :index | > + | element | > + element := self at: index. > + (element class == Array > + ifTrue: [ element isLiteralIfContainedBy: parents ] > + ifFalse: [ element isLiteral ]) ifFalse: [ ^false ] ]. > + parents remove: self. > + ^true! > >

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Do menu and Utilities class>>#grabScreenAndSaveOnDisk
by Tim Johnson 11 Mar '18

11 Mar '18

Hi all, The "Do" menu has an item which I tried to use, but doesn't seem available. This is in Squeak 6.0a-#17799. Utilities class>>#grabScreenAndSaveOnDisk Seems useful. Should it come back? I have found an implementation of it in GIFReadWriter. But: the example in its method comment used an incorrect name for the class. I have fixed that and attached a change set. (The GIF screenshot this method saves looks surprisingly good, considering I'm on a display using millions of colors.) Thanks, Tim

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The Trunk: System-eem.1004.mcz
by commits＠source.squeak.org 10 Mar '18

10 Mar '18

Eliot Miranda uploaded a new version of System to project The Trunk: http://source.squeak.org/trunk/System-eem.1004.mcz ==================== Summary ==================== Name: System-eem.1004 Author: eem Time: 10 March 2018, 10:43:34.493016 am UUID: 1992db0b-7b1c-42ce-a4a3-1bfeab7f25b4 Ancestors: System-dtl.1003 restore a trivial method that went missing or was forgotten a long time ago. =============== Diff against System-dtl.1003 =============== Item was added: + ----- Method: RecentMessages>>purgeFromRecentSubmissions: (in category 'accessing') ----- + purgeFromRecentSubmissions: aMethodReference + methodReferences remove: aMethodReference ifAbsent: []!

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