[antlr-interest] Anyone have some good Python examples?

[Bart Kiers]

It just occurred to me that the PDF version has different page numbering...
My hard copy has 'Element Labels' on page 80.
Also see the entire chapter 6 "Attributes and Actions".

Good luck!

Bart.


On Sat, Feb 6, 2010 at 7:20 AM, Bart Kiers <bkiers at gmail.com> wrote:

> Thomas,
>
> Especially read the paragraph 'Element Labels' on page 95 carefully: that's
> what you need to print the part(s) you're interested in.
>
> Regards,
>
> Bart.
>
>
>
> On Fri, Feb 5, 2010 at 10:59 PM, Bart Kiers <bkiers at gmail.com> wrote:
>
>> Thomas,
>>
>> I highly recommend *carefully* reading the book.
>> Forgive me for saying, but I doubt that you actually read it. And if so,
>> you could only have skimmed through it (you have ordered it only
>> yesterday!).
>>
>> Regards,
>>
>> Bart.
>>
>>
>>
>> On Fri, Feb 5, 2010 at 10:23 PM, Thomas Raef <
>> TRaef at wewatchyourwebsite.com> wrote:
>>
>>> Okay. I would like to thank you all for allowing me to figure out the
>>> errors of my efforts. No sarcasm.
>>>
>>> I found out that since Bart was nice enough to get me started, even
>>> though it was a Java example, I didn't realize where my Python program
>>> was starting and what was antlr code.
>>>
>>> I discovered that my line: insideFunction = False; was causing the java
>>> compilation to complain so I moved that inside my def. I also realized
>>> that the code: $f.text.toString()); is java and is not part of antlr.
>>> Since I was using language=Python, it had no idea what I was trying to
>>> do.
>>>
>>> Now when I run my program, all I get is: STATEMENT ->
>>> (JavaScriptParser.statement_return object at 0x02168C90)
>>>
>>> What I want to see is the line of javascript code from the .js file I'm
>>> reading from prefaced with either STATEMENT or FUNCTION.
>>>
>>> Can anyone help me with that?
>>>
>>> I've watched the tutorials and read through the book, but I cannot for
>>> the life of me figure out how to get the line of javascript to print.
>>>
>>> Please help...
>>>
>>> Thomas J. Raef
>>>
>>>
>>>
>>> > -----Original Message-----
>>> > From: antlr-interest-bounces at antlr.org [mailto:antlr-interest-
>>> > bounces at antlr.org] On Behalf Of Thomas Raef
>>> > Sent: Thursday, February 04, 2010 5:29 PM
>>> > To: antlr-interest at antlr.org
>>> > Subject: [antlr-interest] Anyone have some good Python examples?
>>> >
>>> > I'm trying to get my simple program working and I keep running into
>>> > errors.
>>> >
>>> >
>>> >
>>> > In my JavaScript.g file I've set the language=Python;
>>> >
>>> >
>>> >
>>> > I have a @members section like:
>>> >
>>> >
>>> >
>>> > @members
>>> >
>>> > {
>>> >
>>> >                 insideFunction = False;
>>> >
>>> >
>>> >
>>> > def prettyPrint(type, text):
>>> >
>>> >                 text = text.replace("\r", '') //to remove carriage
>>> > returns in my javascript file (mt.js)
>>> >
>>> >                 text = text.replace("\n", '') // to remove new lines
>>> >
>>> >                 if len(text) > 55:
>>> >
>>> >                                 start = text[:40]
>>> >
>>> >                                 end = text[-10:]
>>> >
>>> >                                 text = start+' ... '+end
>>> >
>>> >                 print type+' -> '+text
>>> >
>>> > }
>>> >
>>> >
>>> >
>>> >
>>> >
>>> > In a JavaScript.G file I have in the functionBody section:
>>> >
>>> >
>>> >
>>> > functionBody
>>> >
>>> >                 :  '{' {insideFunction=True;) LT!* sourceElements LT!*
>>> > '}' {insideFunction=False;}
>>> >
>>> >                 ;
>>> >
>>> >
>>> >
>>> > In sourceElement section I have:
>>> >
>>> > sourceElement
>>> >
>>> >                 : f=functionDeclaration { prettyPrint("FUNCTION ",
>>> > $f.text.toString()); }
>>> >
>>> >                 | s=statement { prettyPrint("STATEMENT ",
>>> > $s.text.toString()); }
>>> >
>>> >                 ;
>>> >
>>> >
>>> >
>>> > Then in python I'm doing:
>>> >
>>> > import antlr3
>>> >
>>> > from JavaScriptLexer import JavaScriptLexer
>>> >
>>> > from JavaScriptParser import JavaScriptParser
>>> >
>>> >
>>> >
>>> > char_stream = antlr3.ANTLRFileStream("mt.js")
>>> >
>>> > lexer = JavaScriptLexer(char_stream)
>>> >
>>> > tokens = antlr3.CommonTokenStream(lexer)
>>> >
>>> > parser = JavaScriptParser(tokens)
>>> >
>>> > parser.program()
>>> >
>>> >
>>> >
>>> > it barfs:
>>> >
>>> >
>>> >
>>> > prettyPrint("STATEMENT", ((s is not None) and
>>> > [self.input.toString(s.start, s.stop)] or [None])[0].toString());
>>> >
>>> > NameError: global name 'prettyPrint' is not defined
>>> >
>>> >
>>> >
>>> > I'm trying, but failing. Can anyone with python experience help me
>>> out?
>>> >
>>> >
>>> >
>>> > Thank you in advance.
>>> >
>>> >
>>> >
>>> > Thomas J. Raef
>>> >
>>> >
>>> >
>>> >
>>> > List: http://www.antlr.org/mailman/listinfo/antlr-interest
>>> > Unsubscribe: http://www.antlr.org/mailman/options/antlr-interest/your-
>>> > email-address
>>>
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>>
>>
>