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Language workbench written in python3

Started byNestor Arocha <nesaro@gmail.com>
First post2012-09-05 14:04 -0700
Last post2012-09-08 08:09 -0700
Articles 7 — 3 participants

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  Language workbench written in python3 Nestor Arocha <nesaro@gmail.com> - 2012-09-05 14:04 -0700
    Re: Language workbench written in python3 Ramchandra Apte <maniandram01@gmail.com> - 2012-09-06 06:34 -0700
      Re: Language workbench written in python3 Dave Angel <d@davea.name> - 2012-09-06 09:46 -0400
        Re: Language workbench written in python3 Ramchandra Apte <maniandram01@gmail.com> - 2012-09-06 06:53 -0700
          Re: Language workbench written in python3 Dave Angel <d@davea.name> - 2012-09-06 10:25 -0400
          Re: Language workbench written in python3 Nestor Arocha <nesaro@gmail.com> - 2012-09-06 12:48 -0700
            Re: Language workbench written in python3 Ramchandra Apte <maniandram01@gmail.com> - 2012-09-08 08:09 -0700

#28542 — Language workbench written in python3

FromNestor Arocha <nesaro@gmail.com>
Date2012-09-05 14:04 -0700
SubjectLanguage workbench written in python3
Message-ID<1ed391c3-8fcf-4a3f-8ad7-0a2cf913b6cc@googlegroups.com>
I'm developing a language workbench written in Python. The idea is to create an environment where grammars and translators can interact easily.

https://github.com/nesaro/pydsl

any comments, feedback or ideas? :)

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#28590

FromRamchandra Apte <maniandram01@gmail.com>
Date2012-09-06 06:34 -0700
Message-ID<634287e3-12b3-4b47-8ad2-38c1bc76ff1a@googlegroups.com>
In reply to#28542
On Thursday, 6 September 2012 02:34:17 UTC+5:30, Nestor Arocha  wrote:
> I'm developing a language workbench written in Python. The idea is to create an environment where grammars and translators can interact easily.
> 
> 
> 
> https://github.com/nesaro/pydsl
> 
> 
> 
> any comments, feedback or ideas? :)

Translator means what precisely?

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#28596

FromDave Angel <d@davea.name>
Date2012-09-06 09:46 -0400
Message-ID<mailman.302.1346939197.27098.python-list@python.org>
In reply to#28590
On 09/06/2012 09:34 AM, Ramchandra Apte wrote:
> Translator means what precisely?

Examples of translators include compilers, assemblers, and
interpreters.  They also include implementations like cfront, which
translates from one high-level language to another lower-level
language.  (high and low being relative)

-- 

DaveA

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#28597

FromRamchandra Apte <maniandram01@gmail.com>
Date2012-09-06 06:53 -0700
Message-ID<314ae0e0-f38f-4cb9-944c-511343988f37@googlegroups.com>
In reply to#28596
On Thursday, 6 September 2012 19:16:38 UTC+5:30, Dave Angel  wrote:
> On 09/06/2012 09:34 AM, Ramchandra Apte wrote:
> 
> > Translator means what precisely?
> 
> 
> 
> Examples of translators include compilers, assemblers, and
> 
> interpreters.  They also include implementations like cfront, which
> 
> translates from one high-level language to another lower-level
> 
> language.  (high and low being relative)
> 
> 
> 
> -- 
> 
> 
> 
> DaveA

Is conversion from Python to C++ possible from this project?

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#28601

FromDave Angel <d@davea.name>
Date2012-09-06 10:25 -0400
Message-ID<mailman.305.1346941565.27098.python-list@python.org>
In reply to#28597
On 09/06/2012 09:53 AM, Ramchandra Apte wrote:
> On Thursday, 6 September 2012 19:16:38 UTC+5:30, Dave Angel  wrote:
>> On 09/06/2012 09:34 AM, Ramchandra Apte wrote:
>>
>>> Translator means what precisely?
>>
>>
>> Examples of translators include compilers, assemblers, and
>>
>> interpreters.  They also include implementations like cfront, which
>>
>> translates from one high-level language to another lower-level
>>
>> language.  (high and low being relative)
>>
> Is conversion from Python to C++ possible from this project?
I'll let the OP answer that.  I don't know anything about it.



-- 

DaveA

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#28630

FromNestor Arocha <nesaro@gmail.com>
Date2012-09-06 12:48 -0700
Message-ID<a7c6b499-46da-4d53-a66b-91f332d90a7b@googlegroups.com>
In reply to#28597
On Thursday, September 6, 2012 2:53:15 PM UTC+1, Ramchandra Apte wrote:
> On Thursday, 6 September 2012 19:16:38 UTC+5:30, Dave Angel  wrote:
> 
> > On 09/06/2012 09:34 AM, Ramchandra Apte wrote:
> 
> > 
> 
> > > Translator means what precisely?
> 
> > 
> 
> > 
> 
> > 
> 
> > Examples of translators include compilers, assemblers, and
> 
> > 
> 
> > interpreters.  They also include implementations like cfront, which
> 
> > 
> 
> > translates from one high-level language to another lower-level
> 
> > 
> 
> > language.  (high and low being relative)
> 
> > 
> 
> > 
> 
> > 
> 
> > -- 
> 
> > 
> 
> > 
> 
> > 
> 
> > DaveA
> 
> 
> 
> Is conversion from Python to C++ possible from this project?

No, it is not currently possible for several reasons: 
   * current parser implementation is a recursive descent parser. I haven't implemented an LR parser yet, although PLY lexers and parsers are supported.
   * Syntax Directed Translator is not fully implemented either.
   * Parser Trees are supported, but there is no clear method defined for converting them into ASTs (like antlr grammars)
   * Even with AST and SDT support, a Python to C++ translator will require more complex tools and a lot of coding.

This tool is oriented to small DSLs parsing and translation; grammars like Python or C++ are too complex for the current implementation

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#28723

FromRamchandra Apte <maniandram01@gmail.com>
Date2012-09-08 08:09 -0700
Message-ID<65cd713e-38cf-4897-8777-0f824503c193@googlegroups.com>
In reply to#28630
On Friday, 7 September 2012 01:18:45 UTC+5:30, Nestor Arocha  wrote:
> On Thursday, September 6, 2012 2:53:15 PM UTC+1, Ramchandra Apte wrote:
> 
> > On Thursday, 6 September 2012 19:16:38 UTC+5:30, Dave Angel  wrote:
> 
> > 
> 
> > > On 09/06/2012 09:34 AM, Ramchandra Apte wrote:
> 
> > 
> 
> > > 
> 
> > 
> 
> > > > Translator means what precisely?
> 
> > 
> 
> > > 
> 
> > 
> 
> > > 
> 
> > 
> 
> > > 
> 
> > 
> 
> > > Examples of translators include compilers, assemblers, and
> 
> > 
> 
> > > 
> 
> > 
> 
> > > interpreters.  They also include implementations like cfront, which
> 
> > 
> 
> > > 
> 
> > 
> 
> > > translates from one high-level language to another lower-level
> 
> > 
> 
> > > 
> 
> > 
> 
> > > language.  (high and low being relative)
> 
> > 
> 
> > > 
> 
> > 
> 
> > > 
> 
> > 
> 
> > > 
> 
> > 
> 
> > > -- 
> 
> > 
> 
> > > 
> 
> > 
> 
> > > 
> 
> > 
> 
> > > 
> 
> > 
> 
> > > DaveA
> 
> > 
> 
> > 
> 
> > 
> 
> > Is conversion from Python to C++ possible from this project?
> 
> 
> 
> No, it is not currently possible for several reasons: 
> 
>    * current parser implementation is a recursive descent parser. I haven't implemented an LR parser yet, although PLY lexers and parsers are supported.
> 
>    * Syntax Directed Translator is not fully implemented either.
> 
>    * Parser Trees are supported, but there is no clear method defined for converting them into ASTs (like antlr grammars)
> 
>    * Even with AST and SDT support, a Python to C++ translator will require more complex tools and a lot of coding.
> 
> 
> 
> This tool is oriented to small DSLs parsing and translation; grammars like Python or C++ are too complex for the current implementation

I was thinking I could use it for my Python to C/C++ converter - py2c @ code.google.com/p/py2c (py2c would love a developer so join and contribute)

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