On Thu, Mar 14, 2013 at 7:24 PM, Mohammad Al Houssami (Alumni) < mha53@mail.aub.edu> wrote:
Oh okay I didnât know that. Thanks for the information.****
I tried that but nothing happened.****
Any ideas why this might be the case?
Maybe your download is incomplete? I did exactly what is in the PBE2 chapter, and it took a rather long time to complete the downloads...
****
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*From:* pharo-users-bounces@lists.gforge.inria.fr [mailto: pharo-users-bounces@lists.gforge.inria.fr] *On Behalf Of *Alain Busser *Sent:* Thursday, March 14, 2013 3:07 PM
*To:* A friendly place where any question about pharo is welcome *Subject:* Re: [Pharo-users] PetitParser Help****
** **
No, not the *system* browser, PetitParser has its own browser:
In a workspace, just write
PPBrowser new
then "DoIt", and a PetitParser browser opens: It is a very beautiful tool, and powerful at that! Especially there is a graphical version which shows your grammar...****
On Thu, Mar 14, 2013 at 5:53 PM, Mohammad Al Houssami (Alumni) < mha53@mail.aub.edu> wrote:****
I am not sure what you mean Alain. Using the system browser to read what ? ****
****
*From:* pharo-users-bounces@lists.gforge.inria.fr [mailto: pharo-users-bounces@lists.gforge.inria.fr] *On Behalf Of *Alain Busser *Sent:* Thursday, March 14, 2013 5:42 AM****
*To:* A friendly place where any question about pharo is welcome *Subject:* Re: [Pharo-users] PetitParser Help****
****
Personnally, I found the browser very useful, so read on until you come to the marvels of
PPBrowser new
Your life will never be the same after that... ****
On Thu, Mar 14, 2013 at 3:20 AM, Mohammad Al Houssami (Alumni) < mha53@mail.aub.edu> wrote:****
Thank You Benjamin,****
There was no way I would figure that out on my own⦠its weird to represent it this way but its clear now.(Probably because im new to Smalltalk though)
Thanks again J****
Mohammad****
****
*From:* pharo-users-bounces@lists.gforge.inria.fr [mailto: pharo-users-bounces@lists.gforge.inria.fr] *On Behalf Of *Benjamin *Sent:* Wednesday, March 13, 2013 8:58 PM *To:* A friendly place where any question about pharo is welcome *Subject:* Re: [Pharo-users] PetitParser Help****
****
This code****
ExpressionGrammar>>term****
^ add / prod****
ExpressionGrammar>>add****
^ prod , $+ asParser trim , term****
ExpressionGrammar>>prod****
^ mul / prim****
ExpressionGrammar>>mul****
^ prim , $*****
asParser trim , prod****
ExpressionGrammar>>prim****
^ parens / number****
ExpressionGrammar>>parens****
^ $( asParser trim , term , $) asParser trim****
****
is not a code to evaluate in a workspace.****
It the representation we use to express the implementation of a method****
By example****
****
ExpressionGrammar>>term****
^ add / prod****
****
means that on class ExpressionGrammar, you need to add a method named term with source code****
^ add / prod****
****
****
So, you can either use a method browser to do it, or programatically do it by doing:****
****
ExpressionGrammar compile: 'term****
^ add / prod'****
****
But this method is a bit ad hoc.****
****
:)****
Hope it helps ;)****
Ben ** **
****
On Mar 13, 2013, at 8:56 PM, Mohammad Al Houssami (Alumni) < mha53@mail.aub.edu> wrote:****
****
Hello Everyone****
****
I was going over PetitParser part on the pharo by example book. http://pharobooks.gforge.inria.fr/PharoByExampleTwo-Eng/latest/PetitParser.p... ****
****
It was all going good until page 11.****
Script 1.19is for creating the class so this was fine. You get an ExpressionGrammar class with all the needed variables, but what about script 1.20?****
****
Where does this script go? I understand what the code does. It is describing a grammar for mathematical expressions by defining what everything is and the rules of the grammar. I am not sure where shall I put this script to run it. In earlier examples I was using the workspace.****
****
Any help is much appreciated.****
Mohammad****
****
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