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 <jfabry@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.alios@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.��

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Johan Fabry �� - ��http://pleiad.cl/~jfabry
PLEIAD lab ��- ��Computer Science��Department (DCC) ��- ��University of Chile