Moose-dev August 2015

moose-dev@list.inf.unibe.ch

34 participants
69 discussions

Is there a JavaScript parser somewhere?
by Alexandre Bergel 18 Aug '15

18 Aug '15

Just wondering… Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Presentation Context Update?
by Sean P. DeNigris 18 Aug '15

18 Aug '15

"A moldable presentation consists of a set of basic presentations selected according to the current development context... Currently defining a development context and filtering presentations based on it is not supported" [1] Is there a timeline for this feature? [1]. http://scg.unibe.ch/archive/papers/Chis14a-MoldableInspector.pdf ----- Cheers, Sean -- View this message in context: http://forum.world.st/Presentation-Context-Update-tp4843171.html Sent from the Moose mailing list archive at Nabble.com.

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sQuick?
by Alexandre Bergel 17 Aug '15

17 Aug '15

Hi! I see the project: github.com/jig08/sQuick_new Can I use it as a replacement of Spotlight on OS X? Is it means to replace it? Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Re: [Pharo-dev] PetitParser speed and cost of PPFailure
by Tudor Girba 16 Aug '15

16 Aug '15

You will probably have more chances to get a response on the Moose mailing list. Cheers, Doru On Sun, Aug 16, 2015 at 5:58 PM, Holger Freyther <holger(a)freyther.de> wrote: > Hi, > > once again I am not sure if this is the right list. The first parser I > wrote using > PetitParser was a SIP (and then MGCP) parser. I have recently ported[1] the > code to Pharo and with Pharo it is very tempting to Use > BlockClosure>>#bench > to get an idea of the speed. > > > I have two performance “issues” and wonder if others hand similar issues > with > PetitParser and if there is a general approach to this. > > > > 1.) Combining two PPCharsetPredicates does not combine the “classification” > table it had. One could create a PPPredicateObjectParser subclass that is > special casing >>#/ to build a combined classification table. > > > 2.) When blindly following a BNF enumeration of "A or B or C or D or E > or CatchAll” and each “A, B” follow common pattern (e.g. token COLON value) > one pays a high cost in the backtracking and constructing the PPFailure for > each failed case. > > In my SIPGrammar I have action parsers for To ==>.. From ==> and would > like to keep that. At the same time I would be happy if the token in front > of the > colon is only consumed once and then delegated to the right parser and if > that > one failed use the ‘catch all’ one. > > I don’t know which abstraction would be needed to allow creating optimized > PetitParsers for such grammars. > > sorry for the long mail, long details and context is below. > > > kind regards > holger > > > > > > > Full details: > > > 1.) CharSetPredicate > > | aParser bParser combinedParser aTime bTime cTime | > > aParser := #digit asParser. > bParser := #letter asParser. > combinedParser := aParser / bParser. > > aTime := [ aParser parse: 'b'] bench. > bTime := [ bParser parse: 'b'] bench. > cTime := [ combinedParser parse: 'b'] bench. > { aTime. bTime. cTime } > > cTime is bounded by the time execution time of of the slowest > of these parsers + overhead (e.g. PPFailure creation). > > e.g. > > #('559,000 per second.' '1,010,000 per second.' '429,000 per second.') > > With a proof of concept PPPredicateCharSetParser > > #('1,330,000 per second.' '1,550,000 per second.' '1,580,000 per second.’) > > The noise is pretty string here but what is important is that bParser and > the > combinedParser are in the same ballpark. > > 2.) Choice Parser > > > > The BNF grammar of the parser is roughly: > > Request = Request-Line > *( message-header ) > CRLF > [ message-body ] > > message-header = (Accept > … > / To > / From > / Via > / extension-header) CRLF > > Alert-Info = "Alert-Info" HCOLON alert-param *(COMMA alert-param) > Accept = "Accept" HCOLON > [ accept-range *(COMMA accept-range) ] > > > So there can be several lines of “message-header”. And each method header > starts with a token/word, a colon and then the parameter. > “extension-header” > is kind of a catch all if no other rule matched. E.g. if a client sends a > To which is > wrongly encoded it would end up with the extension-header. > > I transferred the above naively to PetitParser and end up with something > like > parsing ~500 messages a second. The main cost appears to come from the > choice parser that needs to create a PetitFailure all the time. E.g. if > you have a > line like this: > > ‘From: “Holger Freyther” <sip:323234@foo.de>’ > > The choice parser will start with the “Accept” rule, parse the token > (“From” and > then create a PPFailure, then … rules, then “To”, parse the token.. So we > have > parsing the same token more than once and creating PPFailures all the > time. I > ended up creating a custom parser that will peek the token, have a > horrible chain > of token = ‘XYZ’ ifTrue and then dispatch to the other rule. > > It would be nice if PetitParser could be taught to only parse the token > once and > then delegate to the param rule. E.g. a PPAnyOfParser that allows to > specify the > token to match, the parser to continue with and a fallback parser? > > > > [1] > http://smalltalkhub.com/#!/~osmocom/SIP > http://smalltalkhub.com/#!/~osmocom/MGCP > -- www.tudorgirba.com "Every thing has its own flow"

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Slowdown?
by Alexandre Bergel 16 Aug '15

16 Aug '15

Hi! I have noticed a slowdown in moose. Opening a menu is now particularly slow. Here is a https://dl.dropboxusercontent.com/u/31543901/TMP/slowdown.mov I have just tried on Pharo 5, and it looks like to have a similar problem. Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Tiny Blog Update
by Sean P. DeNigris 16 Aug '15

16 Aug '15

From http://www.humane-assessment.com/blog/the-moldable-gtinspector-deconstructed : > In the GTInspector, you have another option: spawn it to the right (select > and Cmd+o). It should now be Cmd+g, right? ----- Cheers, Sean -- View this message in context: http://forum.world.st/Tiny-Blog-Update-tp4843167.html Sent from the Moose mailing list archive at Nabble.com.

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Worried...
by Alexandre Bergel 15 Aug '15

15 Aug '15

Hi! I am a bit worried. The jenkins for Moose 6.0 has not been green for ages. I am using a fresh 6.0, and I get error when tracing in the debugger: -=-=-=-=-=-=-=-=-=-=-=-= DebuggerMethodMapOpal >> tempNamesForContext: aContext "Answer an Array of all the temp names in scope in aContext starting with the home's first local (the first argument or first temporary if no arguments)." ^ aContext sourceNode scope allTempNames. -=-=-=-=-=-=-=-=-=-=-=-= #scope is sent to nil. A good starting point would be to have the jenkins green back. Having it yellow for too long is not constructive. cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Stack plot
by Alexandre Bergel 15 Aug '15

15 Aug '15

Hi! Milton worked on a StackPlot builder. This is currently highly prototypal. Inspect the expression: RTExperimentalExample new exampleStackOnRoassal It gives something like, which shows the amount of code subclasses of RTShape: Pretty cool! Many other examples are contained in the class RTExperimentalExample It is worth having a look at them. And yes, it is exportable to HTML. Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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very strange error with do: !!!
by Nicolas Anquetil 14 Aug '15

14 Aug '15

How is this possible? aCollection is an array with 1 element (an AdaParameter ...) but each in the do: block contains nil (so the add: gives a DNU) !?!?!? I have no idea how this can be possible Any clue nicolas

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simple question about OSProcress
by Alexandre Bergel 14 Aug '15

14 Aug '15

Hi! I am considering in using OSProcess to run an external application. I have tried: OSProcess waitForCommand: 'ls -l’ but this expression never return a value. I also tried: OSProcess command: 'ls -l /etc’ But it returns an ExternalUnixOSProcess. I am not sure what I can do with this. How can I get the result of the unix command? Sorry if these questions looks naive :-) Cheers, Alexandre -- _,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;: Alexandre Bergel http://www.bergel.eu ^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;._,.;:~^~:;.

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Moose-dev August 2015