Yes I am aware of PettitParser but the one thing that made me very interested into SmaCC is that it already supports Python syntax parsing , though I think is for Python 2 but if its 2.7 it wont be much issue for me that use Python 3.4 syntax.
>From a first look it looks PettitParser easier to use but Thiery told me SmaCC is also fairly easy and personally I dont care so much I only want something that gets the job done as fast as possible. Having an existing python parser certainly makes things faster for me. But yes I have played around with pettitparser and I really liked it. On Wed, Jan 28, 2015 at 4:22 PM, Johan Fabry <jfa...@dcc.uchile.cl> wrote: > Hi Kilon, > > I think it’s better that you take a look at PetitParser (e.g. > http://www.themoosebook.org/book/internals/petit-parser ) I have found > PetitParser more user friendly than SmaCC. > > > On Jan 28, 2015, at 14:53, kilon alios <kilon.al...@gmail.com> wrote: > > Ok I have read a few times of the tutorial of Smacc in here > http://www.refactoryworkers.com/SmaCC/ASTs.html > > and I am also following the help tool documentation inside pharo for SmaCC > and I have to say I am very confused. Please bare with me because I am > extremely noob when it comes to parsing, this is my first effort. > > Now the way I understand it so far, is that SmaCC uses a syntax similar to > regex expressions to define parsers and scanners. Scanners evaluate a > string to see that it contains a valid form and parser divide to parts > named as "tokens" and help in the creating of ASTs which are basically > hierarchy tree containing the syntax elements of a language. > > Now in order to make SmaCC work I need to use the SmaCC tool that comes > with pharo . The smacc tool takes two inputs a scanner and a parser class. > Does that mean I need to create that parser and scanner class ? I thought > since I define the syntax that those things would be generated by the tool. > > What I need to define exactly ? > > Why when I select the PythonScanner2 and PythonParser2 and click then > Compile LR it gives a MNU receiver of method is nil ? > > I am using latest Pharo 4 image. > > My goal is to parse python types to similar pharo objects. I get those > python types as strings and my main focus in lists, dictionaries and tuples > . The tricky part is that one can contain the other inside in every > imagined way. > > The way I understand it I will need something called "transformations" to > convert those python types to OrderedCollections, Arrays etc and anything > would make more sense for a pharo coder. > > Additionally what is the meaning of the vertibal bar ? --> | > eg. > | Number > > Are there any other tutorials that can help a beginner like me to > understand these concepts ? > > I am not looking for someone to give me the solution to the plate, I would > love to learn and understand parsing because I am very interested into > making Pharo easy to mix with Python code and allow Pharo to use Python > libraries without the user having to learn or code Python :) > > As you may imagine this is a crucial ingredient for my project Ephestos > which tries to use Pharo to script Blender by either replacing or > cooperating with blender python. So learning a good way to parse pharo code > to python code and vice versa is extremely important for me. > > > > > ---> Save our in-boxes! http://emailcharter.org <--- > > Johan Fabry - http://pleiad.cl/~jfabry > PLEIAD lab - Computer Science Department (DCC) - University of Chile > >
