May 2018 - Pharo-users - lists.pharo.org

Re: [Pharo-users] Code completion in Pharo?

by Tim Mackinnon

Thatâs exactly the exploratory attitude we like to see... I think the code completer is pluggable and can be selected in the settings (I think there are 2, and their history is probably in this list somewhere), so you can try your own too. Tim Sent from my iPhone Sent from my iPhone > On 26 May 2018, at 16:10, Andrzej Olszak <andrzej.olszak(a)gmail.com> wrote: > > Hi Tim and Nicole, > > Thanks for great tips. The click+keyModifier actions are extremely useful, and combined with breakpoints make for a great way of 'peeking under the hood' of the existing features. > > Also, I've just found a perfect piece of real code to do some learning and experimenting on - it will be the code completion itself! ;-) > > Andrzej > >> On Fri, May 25, 2018 at 10:47 AM, Nicole de Graaf <nic(a)soops.nl> wrote: >> Hi Andrzej, >> >> my way of doing it: >> >> Searching in the image what other guys are doing. >> >> Finder: asMorph >> >> and here you can find methods like >> >> #openAsMorph .. you can get a clue. >> >> or: >> >> âsome textâ asMorph inspect .. >> than you get the object and you can search the class and from here the class the references. >> >> All my steps are based on code reading not code completion. >> >> Code completion I use more if I know what is should be and use the same method names as the other developers. >> >> Nic >> >> >>> On 25 May 2018, at 03:12, andreo <andrzej.olszak(a)gmail.com> wrote: >>> >>> Dear Pharoers, >>> >>> I'm just starting out with Pharo 6.1, and I'm trying to use code completion >>> to interactively explore various objects and their messages. However, I'm >>> having difficulties doing this efficiently - I think I must be missing >>> something obvious, and I hope you can point me in the right direction. >>> >>> For instance, let's say I have the below in Playground: >>> >>> 'some text' asMorph >>> >>> and I would like to display the morph object as a window, but I don't know >>> the exact message name, or whether such a message exists at all. If I type >>> "Window", then the completion popup will show a long list of matching >>> messages, but won't show their documentation or argument names, so it will >>> be difficult to know exactly what these messages do. >>> I can see that one can do "Do it and go" on an expression and then browse >>> the available messages in Meta, but maybe there is simpler/faster way? >>> >>> How would an experienced Pharo user typically go about discovering the right >>> messages in such situations? >>> >>> Best regards, >>> Andrzej >>> >>> >>> >>> -- >>> Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html >

May 26, 2018

Re: [Pharo-users] Code completion in Pharo?

by Andrzej Olszak

Hi Tim and Nicole, Thanks for great tips. The click+keyModifier actions are extremely useful, and combined with breakpoints make for a great way of 'peeking under the hood' of the existing features. Also, I've just found a perfect piece of real code to do some learning and experimenting on - it will be the code completion itself! ;-) Andrzej On Fri, May 25, 2018 at 10:47 AM, Nicole de Graaf <nic(a)soops.nl> wrote: > Hi Andrzej, > > my way of doing it: > > Searching in the image what other guys are doing. > > Finder: asMorph > > and here you can find methods like > > #openAsMorph .. you can get a clue. > > or: > > âsome textâ asMorph inspect .. > than you get the object and you can search the class and from here the > class the references. > > *All my steps are based on code reading not code completion.* > > Code completion I use more if I know what is should be and use the same > method names as the other developers. > > Nic > > > On 25 May 2018, at 03:12, andreo <andrzej.olszak(a)gmail.com> wrote: > > Dear Pharoers, > > I'm just starting out with Pharo 6.1, and I'm trying to use code completion > to interactively explore various objects and their messages. However, I'm > having difficulties doing this efficiently - I think I must be missing > something obvious, and I hope you can point me in the right direction. > > For instance, let's say I have the below in Playground: > > 'some text' asMorph > > and I would like to display the morph object as a window, but I don't know > the exact message name, or whether such a message exists at all. If I type > "Window", then the completion popup will show a long list of matching > messages, but won't show their documentation or argument names, so it will > be difficult to know exactly what these messages do. > I can see that one can do "Do it and go" on an expression and then browse > the available messages in Meta, but maybe there is simpler/faster way? > > How would an experienced Pharo user typically go about discovering the > right > messages in such situations? > > Best regards, > Andrzej > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > >

May 26, 2018

Re: [Pharo-users] Serving files with ZnServer

by Hilaire

Le 26/05/2018 Ã 12:09, Sven Van Caekenberghe a Ã©critÂ : > ZnStaticFileServerDelegate does not automatically generate an index for a directory. Ok, understood. > > BTW, you do no really need to go via files, you can just serve resources directly. yes,Â I was just trying. Hilaire -- Dr. Geo http://drgeo.eu

May 26, 2018

Re: [Pharo-users] Serving files with ZnServer

by Sven Van Caekenberghe

on macOS server := ZnServer startDefaultOn: 9595. server delegate: ( ZnStaticFileServerDelegate new directory: '/Users/sven/' asFileReference ; prefixFromString: 'files'; yourself). server logToTranscript. FileLocator home / 'small.html' writeStreamDo: [ :out | (ZnHtmlOutputStream on: out) tag: #h1 with: #Small; tag: #p with: 'This is a small HTML document' ]. ZnClient new get: 'http://localhost:9595/files/small.html'. ZnStaticFileServerDelegate does not automatically generate an index for a directory. BTW, you do no really need to go via files, you can just serve resources directly. > On 26 May 2018, at 10:28, Hilaire <hilaire(a)drgeo.eu> wrote: > > Hi, > > On P7, I try to server files with ZnServer, but got trouble: > > server := ZnServer startDefaultOn: 9595. > server delegate: ( > ZnStaticFileServerDelegate new > directory: '/home/hilaire' asFileReference ; > prefixFromString: 'files'; > yourself). > server logToTranscript. > server start. > > The browser pointed at http://localhost:9595/files/ only print: > > Not Found /files/ > > > The log reflects the not found: > > 2018-05-26 10:21:06 378 128292 Started ZnManagingMultiThreadedServer HTTP port 9595 > 2018-05-26 10:21:10 379 552905 Connection Accepted 127.0.0.1 > 2018-05-26 10:21:10 380 552905 Connection Accepted 127.0.0.1 > 2018-05-26 10:21:10 381 990536 Request Read a ZnRequest(GET /files/) 25ms > 2018-05-26 10:21:10 382 990536 Request Handled a ZnRequest(GET /files/) 4ms > 2018-05-26 10:21:10 383 990536 Response Written a ZnResponse(404 Not Found text/plain;charset=utf-8 19B) 2ms > 2018-05-26 10:21:10 384 990536 GET /files/ 404 19B 6ms > > Any idea? > > Hilaire > > -- > Dr. Geo > http://drgeo.eu > > >

May 26, 2018

Re: [Pharo-users] Serving files with ZnServer

by Norbert Hartl

What shall it do with the directory? Did you try to access a file? Norbert > Am 26.05.2018 um 10:28 schrieb Hilaire <hilaire(a)drgeo.eu>: > > Hi, > > On P7, I try to server files with ZnServer, but got trouble: > > server := ZnServer startDefaultOn: 9595. > server delegate: ( > ZnStaticFileServerDelegate new > directory: '/home/hilaire' asFileReference ; > prefixFromString: 'files'; > yourself). > server logToTranscript. > server start. > > The browser pointed at http://localhost:9595/files/ only print: > > Not Found /files/ > > > The log reflects the not found: > > 2018-05-26 10:21:06 378 128292 Started ZnManagingMultiThreadedServer HTTP port 9595 > 2018-05-26 10:21:10 379 552905 Connection Accepted 127.0.0.1 > 2018-05-26 10:21:10 380 552905 Connection Accepted 127.0.0.1 > 2018-05-26 10:21:10 381 990536 Request Read a ZnRequest(GET /files/) 25ms > 2018-05-26 10:21:10 382 990536 Request Handled a ZnRequest(GET /files/) 4ms > 2018-05-26 10:21:10 383 990536 Response Written a ZnResponse(404 Not Found text/plain;charset=utf-8 19B) 2ms > 2018-05-26 10:21:10 384 990536 GET /files/ 404 19B 6ms > > Any idea? > > Hilaire > > -- > Dr. Geo > http://drgeo.eu > > >

May 26, 2018

Re: [Pharo-users] Macros?

by Norbert Hartl

I need to say that this is not a good use case. First and most important is that you should not have deployment switches in your code. Your system should be configured for a special deployment mode not detecting in code. Second but not least important you add references to test classes in your business logic. Usually you do not load test code in a production image. Couldnât resist, sorry Norbert > Am 26.05.2018 um 07:46 schrieb ClÃ©ment Bera <bera.clement(a)gmail.com>: > > Just mentioning another use-case: > > getDatabaseInstance > ^ (Production CifTrue: [Database] CifFalse: [MockDatabase]) new > > Since I use conditional compilation more often than just precompiling constants. > > I don't see an equivalent of asMethodConstant AST manipulation at runtime strategy in the image for this case right now but it's probably a couple lines of code with Reflectivity. > >> On Sat, May 26, 2018 at 7:28 AM, ClÃ©ment Bera <bera.clement(a)gmail.com> wrote: >> >> >>> On Fri, May 25, 2018 at 10:44 PM, Esteban Lorenzano <estebanlm(a)gmail.com> wrote: >>> >>> >>>> On 25 May 2018, at 17:30, ClÃ©ment Bera <bera.clement(a)gmail.com> wrote: >>>> >>>> What about a preprocessor like the Java preprocessors ? The Truffle project relies heavily on that for high performance Java and it's quite nice. It's difficult to do that in Smalltalk right now. >>>> >>>> I think if you want to do what are asking for you just need to write a bytecode compiler extension. >>>> >>>> I did something similar in the past to have precomputed constants through AST manipulation at compilation time. You can find it here with examples: http://smalltalkhub.com/#!/~ClementBera/NeoCompiler. Once the code is loaded you need to recompile the examples (NeoCompilerExample withAllSubclassesDo: #compileAll.). With it you can write code such as: >>>> [ Smalltalk vm class ] Cvalue >>>> And depending if the compiler allowsPrecompilation or not, the bytecode compiler generates: >>>> Smalltalk vm class >>>> Or just a push literal with the precomputed value (the class VirtualMachine). >>> >>> this is not what #asMethodConstant provides? >> >> Can you turn asMethodConstant On and Off so you have the constant in production and not a development time ? Typically at development time I change the constants generated a lot and I don't want to waste time recompiling all the time. >> >> But yeah, my project is from 2014. I guess instead of preprocessing you could do everything at runtime with AST manipulation/recompilation like in asMethodConstant. >> >> The main point of preprocessing IMO is to control performance, it's just easier for me to just look at the generated bytecode and change the preprocessor until it gets what I want, it's not always easy to run code that will change your method at runtime quickly so you can look at the bytecode generated. >> >> Anyway, I am not convinced at all something like that should be in the base image. >> >>> >>> Esteban >>> >>>> In the end I decided not to use this, but you can use it and extend it to support more than just constants (any AST manipulation is possible). >>>> Just checked it works in Pharo 6. >>>> >>>>> On Fri, May 25, 2018 at 4:26 PM, Stephan Eggermont <stephan(a)stack.nl> wrote: >>>>> Debiller 777 <ozovozovozo202(a)gmail.com> >>>>> wrote: >>>>> > Well, I've already asked about adding new literals to pharo or >>>>> Smalltalk in >>>>> > general, however this time I have a better idea: >>>>> > macros. Can they be added? Because if I understand correctly they may be >>>>> > the only way to do that. >>>>> >>>>> Why do you think they would be a good idea? We have powerful >>>>> meta-programming facilities that are well understood and somewhat supported >>>>> by tooling. How do we get value out of macros? >>>>> >>>>> Stephan >>>>> >>>>> >>>>> >>>> >>>> >>>> >>>> -- >>>> ClÃ©ment BÃ©ra >>>> https://clementbera.github.io/ >>>> https://clementbera.wordpress.com/ >>> >> >> >> >> -- >> ClÃ©ment BÃ©ra >> https://clementbera.github.io/ >> https://clementbera.wordpress.com/ > > > > -- > ClÃ©ment BÃ©ra > https://clementbera.github.io/ > https://clementbera.wordpress.com/

May 26, 2018

Serving files with ZnServer

by Hilaire

Hi, On P7, I try to server files with ZnServer, but got trouble: server := ZnServer startDefaultOn: 9595. server delegate: ( ZnStaticFileServerDelegate new Â Â Â directory: '/home/hilaire' asFileReference ; Â Â Â prefixFromString: 'files'; Â Â Â yourself). server logToTranscript. server start. The browser pointed at http://localhost:9595/files/ only print: Not Found /files/ The log reflects the not found: 2018-05-26 10:21:06 378 128292 Started ZnManagingMultiThreadedServer HTTP port 9595 2018-05-26 10:21:10 379 552905 Connection Accepted 127.0.0.1 2018-05-26 10:21:10 380 552905 Connection Accepted 127.0.0.1 2018-05-26 10:21:10 381 990536 Request Read a ZnRequest(GET /files/) 25ms 2018-05-26 10:21:10 382 990536 Request Handled a ZnRequest(GET /files/) 4ms 2018-05-26 10:21:10 383 990536 Response Written a ZnResponse(404 Not Found text/plain;charset=utf-8 19B) 2ms 2018-05-26 10:21:10 384 990536 GET /files/ 404 19B 6ms Any idea? Hilaire -- Dr. Geo http://drgeo.eu

May 26, 2018

Re: [Pharo-users] Macros?

by Denis Kudriashov

2018-05-26 9:33 GMT+03:00 ClÃ©ment Bera <bera.clement(a)gmail.com>: > > > On Sat, May 26, 2018 at 8:07 AM, Denis Kudriashov <dionisiydk(a)gmail.com> > wrote: > >> Hi >> >> 2018-05-26 8:46 GMT+03:00 ClÃ©ment Bera <bera.clement(a)gmail.com>: >> >>> Just mentioning another use-case: >>> >>> getDatabaseInstance >>> ^ (Production CifTrue: [Database] CifFalse: [MockDatabase]) new >>> >> >> I think following code will work: >> >> getDatabaseInstance >> ^ (Production ifTrue: [Database] ifFalse: [MockDatabase]) >> asMethodConstant new >> >> >> > Arf, obviously you try to work around the example. You can have anything > in the block, not necessarily a constant. > > foo > ^ Condition CifTrue: [self bar] CifFalse: [self baz] > > And I want the condition to be replaced by the contents of one block or > the other, not just by a constant. > Yes, I see. It's different > >>> >>> >>> Since I use conditional compilation more often than just precompiling >>> constants. >>> >>> I don't see an equivalent of asMethodConstant AST manipulation at >>> runtime strategy in the image for this case right now but it's probably a >>> couple lines of code with Reflectivity. >>> >>> On Sat, May 26, 2018 at 7:28 AM, ClÃ©ment Bera <bera.clement(a)gmail.com> >>> wrote: >>> >>>> >>>> >>>> On Fri, May 25, 2018 at 10:44 PM, Esteban Lorenzano < >>>> estebanlm(a)gmail.com> wrote: >>>> >>>>> >>>>> >>>>> On 25 May 2018, at 17:30, ClÃ©ment Bera <bera.clement(a)gmail.com> wrote: >>>>> >>>>> What about a preprocessor like the Java preprocessors ? The Truffle >>>>> project relies heavily on that for high performance Java and it's quite >>>>> nice. It's difficult to do that in Smalltalk right now. >>>>> >>>>> I think if you want to do what are asking for you just need to write a >>>>> bytecode compiler extension. >>>>> >>>>> I did something similar in the past to have precomputed constants >>>>> through AST manipulation at compilation time. You can find it here with >>>>> examples: http://smalltalkhub.com/#!/~ClementBera/NeoCompiler. Once >>>>> the code is loaded you need to recompile the examples (NeoCompilerExample >>>>> withAllSubclassesDo: #compileAll.). With it you can write code such >>>>> as: >>>>> [ Smalltalk vm class ] Cvalue >>>>> And depending if the compiler allowsPrecompilation or not, the >>>>> bytecode compiler generates: >>>>> Smalltalk vm class >>>>> Or just a push literal with the precomputed value (the class >>>>> VirtualMachine). >>>>> >>>>> >>>>> this is not what #asMethodConstant provides? >>>>> >>>> >>>> Can you turn asMethodConstant On and Off so you have the constant in >>>> production and not a development time ? Typically at development time I >>>> change the constants generated a lot and I don't want to waste time >>>> recompiling all the time. >>>> >>>> But yeah, my project is from 2014. I guess instead of preprocessing you >>>> could do everything at runtime with AST manipulation/recompilation like >>>> in asMethodConstant. >>>> >>>> The main point of preprocessing IMO is to control performance, it's >>>> just easier for me to just look at the generated bytecode and change the >>>> preprocessor until it gets what I want, it's not always easy to run code >>>> that will change your method at runtime quickly so you can look at the >>>> bytecode generated. >>>> >>>> Anyway, I am not convinced at all something like that should be in the >>>> base image. >>>> >>>> >>>>> >>>>> Esteban >>>>> >>>>> In the end I decided not to use this, but you can use it and extend it >>>>> to support more than just constants (any AST manipulation is possible). >>>>> Just checked it works in Pharo 6. >>>>> >>>>> On Fri, May 25, 2018 at 4:26 PM, Stephan Eggermont <stephan(a)stack.nl> >>>>> wrote: >>>>> >>>>>> Debiller 777 <ozovozovozo202(a)gmail.com> >>>>>> wrote: >>>>>> > Well, I've already asked about adding new literals to pharo or >>>>>> Smalltalk in >>>>>> > general, however this time I have a better idea: >>>>>> > macros. Can they be added? Because if I understand correctly they >>>>>> may be >>>>>> > the only way to do that. >>>>>> >>>>>> Why do you think they would be a good idea? We have powerful >>>>>> meta-programming facilities that are well understood and somewhat >>>>>> supported >>>>>> by tooling. How do we get value out of macros? >>>>>> >>>>>> Stephan >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> -- >>>>> ClÃ©ment BÃ©ra >>>>> https://clementbera.github.io/ >>>>> https://clementbera.wordpress.com/ >>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> ClÃ©ment BÃ©ra >>>> https://clementbera.github.io/ >>>> https://clementbera.wordpress.com/ >>>> >>> >>> >>> >>> -- >>> ClÃ©ment BÃ©ra >>> https://clementbera.github.io/ >>> https://clementbera.wordpress.com/ >>> >> >> > > > -- > ClÃ©ment BÃ©ra > https://clementbera.github.io/ > https://clementbera.wordpress.com/ >

May 26, 2018

Re: [Pharo-users] Macros?

by ClÃ©ment Bera

On Sat, May 26, 2018 at 8:07 AM, Denis Kudriashov <dionisiydk(a)gmail.com> wrote: > Hi > > 2018-05-26 8:46 GMT+03:00 ClÃ©ment Bera <bera.clement(a)gmail.com>: > >> Just mentioning another use-case: >> >> getDatabaseInstance >> ^ (Production CifTrue: [Database] CifFalse: [MockDatabase]) new >> > > I think following code will work: > > getDatabaseInstance > ^ (Production ifTrue: [Database] ifFalse: [MockDatabase]) > asMethodConstant new > > > Arf, obviously you try to work around the example. You can have anything in the block, not necessarily a constant. foo ^ Condition CifTrue: [self bar] CifFalse: [self baz] And I want the condition to be replaced by the contents of one block or the other, not just by a constant. >> >> >> Since I use conditional compilation more often than just precompiling >> constants. >> >> I don't see an equivalent of asMethodConstant AST manipulation at >> runtime strategy in the image for this case right now but it's probably a >> couple lines of code with Reflectivity. >> >> On Sat, May 26, 2018 at 7:28 AM, ClÃ©ment Bera <bera.clement(a)gmail.com> >> wrote: >> >>> >>> >>> On Fri, May 25, 2018 at 10:44 PM, Esteban Lorenzano <estebanlm(a)gmail.com >>> > wrote: >>> >>>> >>>> >>>> On 25 May 2018, at 17:30, ClÃ©ment Bera <bera.clement(a)gmail.com> wrote: >>>> >>>> What about a preprocessor like the Java preprocessors ? The Truffle >>>> project relies heavily on that for high performance Java and it's quite >>>> nice. It's difficult to do that in Smalltalk right now. >>>> >>>> I think if you want to do what are asking for you just need to write a >>>> bytecode compiler extension. >>>> >>>> I did something similar in the past to have precomputed constants >>>> through AST manipulation at compilation time. You can find it here with >>>> examples: http://smalltalkhub.com/#!/~ClementBera/NeoCompiler. Once >>>> the code is loaded you need to recompile the examples (NeoCompilerExample >>>> withAllSubclassesDo: #compileAll.). With it you can write code such as: >>>> [ Smalltalk vm class ] Cvalue >>>> And depending if the compiler allowsPrecompilation or not, the bytecode >>>> compiler generates: >>>> Smalltalk vm class >>>> Or just a push literal with the precomputed value (the class >>>> VirtualMachine). >>>> >>>> >>>> this is not what #asMethodConstant provides? >>>> >>> >>> Can you turn asMethodConstant On and Off so you have the constant in >>> production and not a development time ? Typically at development time I >>> change the constants generated a lot and I don't want to waste time >>> recompiling all the time. >>> >>> But yeah, my project is from 2014. I guess instead of preprocessing you >>> could do everything at runtime with AST manipulation/recompilation like >>> in asMethodConstant. >>> >>> The main point of preprocessing IMO is to control performance, it's just >>> easier for me to just look at the generated bytecode and change the >>> preprocessor until it gets what I want, it's not always easy to run code >>> that will change your method at runtime quickly so you can look at the >>> bytecode generated. >>> >>> Anyway, I am not convinced at all something like that should be in the >>> base image. >>> >>> >>>> >>>> Esteban >>>> >>>> In the end I decided not to use this, but you can use it and extend it >>>> to support more than just constants (any AST manipulation is possible). >>>> Just checked it works in Pharo 6. >>>> >>>> On Fri, May 25, 2018 at 4:26 PM, Stephan Eggermont <stephan(a)stack.nl> >>>> wrote: >>>> >>>>> Debiller 777 <ozovozovozo202(a)gmail.com> >>>>> wrote: >>>>> > Well, I've already asked about adding new literals to pharo or >>>>> Smalltalk in >>>>> > general, however this time I have a better idea: >>>>> > macros. Can they be added? Because if I understand correctly they >>>>> may be >>>>> > the only way to do that. >>>>> >>>>> Why do you think they would be a good idea? We have powerful >>>>> meta-programming facilities that are well understood and somewhat >>>>> supported >>>>> by tooling. How do we get value out of macros? >>>>> >>>>> Stephan >>>>> >>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> ClÃ©ment BÃ©ra >>>> https://clementbera.github.io/ >>>> https://clementbera.wordpress.com/ >>>> >>>> >>>> >>> >>> >>> -- >>> ClÃ©ment BÃ©ra >>> https://clementbera.github.io/ >>> https://clementbera.wordpress.com/ >>> >> >> >> >> -- >> ClÃ©ment BÃ©ra >> https://clementbera.github.io/ >> https://clementbera.wordpress.com/ >> > > -- ClÃ©ment BÃ©ra https://clementbera.github.io/ https://clementbera.wordpress.com/

May 26, 2018

Re: [Pharo-users] Macros?

by Denis Kudriashov

Hi 2018-05-26 8:46 GMT+03:00 ClÃ©ment Bera <bera.clement(a)gmail.com>: > Just mentioning another use-case: > > getDatabaseInstance > ^ (Production CifTrue: [Database] CifFalse: [MockDatabase]) new > I think following code will work: getDatabaseInstance ^ (Production ifTrue: [Database] ifFalse: [MockDatabase]) asMethodConstant new > > > Since I use conditional compilation more often than just precompiling > constants. > > I don't see an equivalent of asMethodConstant AST manipulation at runtime > strategy in the image for this case right now but it's probably a couple > lines of code with Reflectivity. > > On Sat, May 26, 2018 at 7:28 AM, ClÃ©ment Bera <bera.clement(a)gmail.com> > wrote: > >> >> >> On Fri, May 25, 2018 at 10:44 PM, Esteban Lorenzano <estebanlm(a)gmail.com> >> wrote: >> >>> >>> >>> On 25 May 2018, at 17:30, ClÃ©ment Bera <bera.clement(a)gmail.com> wrote: >>> >>> What about a preprocessor like the Java preprocessors ? The Truffle >>> project relies heavily on that for high performance Java and it's quite >>> nice. It's difficult to do that in Smalltalk right now. >>> >>> I think if you want to do what are asking for you just need to write a >>> bytecode compiler extension. >>> >>> I did something similar in the past to have precomputed constants >>> through AST manipulation at compilation time. You can find it here with >>> examples: http://smalltalkhub.com/#!/~ClementBera/NeoCompiler. Once the >>> code is loaded you need to recompile the examples (NeoCompilerExample >>> withAllSubclassesDo: #compileAll.). With it you can write code such as: >>> [ Smalltalk vm class ] Cvalue >>> And depending if the compiler allowsPrecompilation or not, the bytecode >>> compiler generates: >>> Smalltalk vm class >>> Or just a push literal with the precomputed value (the class >>> VirtualMachine). >>> >>> >>> this is not what #asMethodConstant provides? >>> >> >> Can you turn asMethodConstant On and Off so you have the constant in >> production and not a development time ? Typically at development time I >> change the constants generated a lot and I don't want to waste time >> recompiling all the time. >> >> But yeah, my project is from 2014. I guess instead of preprocessing you >> could do everything at runtime with AST manipulation/recompilation like >> in asMethodConstant. >> >> The main point of preprocessing IMO is to control performance, it's just >> easier for me to just look at the generated bytecode and change the >> preprocessor until it gets what I want, it's not always easy to run code >> that will change your method at runtime quickly so you can look at the >> bytecode generated. >> >> Anyway, I am not convinced at all something like that should be in the >> base image. >> >> >>> >>> Esteban >>> >>> In the end I decided not to use this, but you can use it and extend it >>> to support more than just constants (any AST manipulation is possible). >>> Just checked it works in Pharo 6. >>> >>> On Fri, May 25, 2018 at 4:26 PM, Stephan Eggermont <stephan(a)stack.nl> >>> wrote: >>> >>>> Debiller 777 <ozovozovozo202(a)gmail.com> >>>> wrote: >>>> > Well, I've already asked about adding new literals to pharo or >>>> Smalltalk in >>>> > general, however this time I have a better idea: >>>> > macros. Can they be added? Because if I understand correctly they may >>>> be >>>> > the only way to do that. >>>> >>>> Why do you think they would be a good idea? We have powerful >>>> meta-programming facilities that are well understood and somewhat >>>> supported >>>> by tooling. How do we get value out of macros? >>>> >>>> Stephan >>>> >>>> >>>> >>>> >>> >>> >>> -- >>> ClÃ©ment BÃ©ra >>> https://clementbera.github.io/ >>> https://clementbera.wordpress.com/ >>> >>> >>> >> >> >> -- >> ClÃ©ment BÃ©ra >> https://clementbera.github.io/ >> https://clementbera.wordpress.com/ >> > > > > -- > ClÃ©ment BÃ©ra > https://clementbera.github.io/ > https://clementbera.wordpress.com/ >

May 26, 2018