Re: [BangPypers] Language Parsing and output generation
This is not about running Lua inside Python or Python inside Lua. I will go thorough few of tools you all mentioned and will back. Making a grammar is really fun. I am more curious to know how the AST would turn to be. -- Gopal On Tue, Aug 23, 2011 at 3:04 AM, Anand Balachandran Pillai abpil...@gmail.com wrote: On Tue, Aug 23, 2011 at 11:15 AM, Gopalakrishnan Subramani gopalakrishnan.subram...@gmail.com wrote: I could make a grammar compiled myself. I will look into SPARK.. Anybody has experience in pyparsing http://pyparsing.wikispaces.com/ ? Under Examples http://pyparsing.wikispaces.com/Examples Python language example is promising. Have you taken a look at Lunatic Python ? http://labix.org/lunatic-python Looks like it already provides the required interfaces you need. Regards, Gopal On Mon, Aug 22, 2011 at 11:25 PM, Noufal Ibrahim nou...@gmail.com wrote: Gopalakrishnan Subramani gopalakrishnan.subram...@gmail.com writes: Source language IO is very limited and it has functions to map to IO and UI. As a total, they have around 100+ function. Those can be easily done in Lua. [...] For a project in one of my earlier companies, I used SPARK[1] to write a little parser for a language of my own making to used to specify some conditionals. The parser would convert this into a python expression which could be evaluated with some objects to return a true or a false. If you have the grammar of your source language at hand, it's a fews hours job to write a parser for it using SPARK. Once you do that, you have to write a backend to convert it into LUA which might be a little more complex but not impossibly so. Footnotes: [1] http://pages.cpsc.ucalgary.ca/~aycock/spark/ -- ~noufal http://nibrahim.net.in An empty cab drove up and Sarah Bernhardt got out. -Arthur Baer, American comic and columnist ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers -- --Anand ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
Re: [BangPypers] Language Parsing and output generation
Hi, On Tue, Aug 23, 2011 at 12:39 AM, Gopalakrishnan Subramani gopalakrishnan.subram...@gmail.com wrote: The idea is to convert the 'Description Language' code to Lua code using Python. This involves 2 things. One is parsing and another is generation. In between 2, I need to make a tree as a output from parser, kind of AST. LLVM is a good tool for such stuff. llvm-py is the one with python bindings. The original LLVM site has good tutorials and examples. Project URL: http://www.mdevan.org/llvm-py/ -- Thank you Balachandran Sivakumar Arise Awake and stop not till the goal is reached. Mail: benignb...@gmail.com Blog: http://benignbala.wordpress.com/ ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
Re: [BangPypers] Language Parsing and output generation
On Tue, Aug 23, 2011 at 11:15 AM, Gopalakrishnan Subramani gopalakrishnan.subram...@gmail.com wrote: I could make a grammar compiled myself. I will look into SPARK.. Anybody has experience in pyparsing http://pyparsing.wikispaces.com/ ? Under Examples http://pyparsing.wikispaces.com/Examples Python language example is promising. Have you taken a look at Lunatic Python ? http://labix.org/lunatic-python Looks like it already provides the required interfaces you need. Regards, Gopal On Mon, Aug 22, 2011 at 11:25 PM, Noufal Ibrahim nou...@gmail.com wrote: Gopalakrishnan Subramani gopalakrishnan.subram...@gmail.com writes: Source language IO is very limited and it has functions to map to IO and UI. As a total, they have around 100+ function. Those can be easily done in Lua. [...] For a project in one of my earlier companies, I used SPARK[1] to write a little parser for a language of my own making to used to specify some conditionals. The parser would convert this into a python expression which could be evaluated with some objects to return a true or a false. If you have the grammar of your source language at hand, it's a fews hours job to write a parser for it using SPARK. Once you do that, you have to write a backend to convert it into LUA which might be a little more complex but not impossibly so. Footnotes: [1] http://pages.cpsc.ucalgary.ca/~aycock/spark/ -- ~noufal http://nibrahim.net.in An empty cab drove up and Sarah Bernhardt got out. -Arthur Baer, American comic and columnist ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers -- --Anand ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
Re: [BangPypers] Language Parsing and output generation
On Mon, Aug 22, 2011 at 01:09:19PM -0600, Gopalakrishnan Subramani wrote: I prefer Python for this conversion. Any idea is appreciated. In your source language, do you have tools to create AST? If not, then it would be the first thing to aim for. Then you need a mechanism to translate that AST to the target language specs. There is a lot of compiler theory involved in this problem, unless your source language really really very minimal (just I/O, conditional and looping) and in which case you do a literal translation to the other language and see it works. -- Senthil ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
Re: [BangPypers] Language Parsing and output generation
Source language IO is very limited and it has functions to map to IO and UI. As a total, they have around 100+ function. Those can be easily done in Lua. -- Gopal On Mon, Aug 22, 2011 at 6:10 PM, Senthil Kumaran sent...@uthcode.comwrote: On Mon, Aug 22, 2011 at 01:09:19PM -0600, Gopalakrishnan Subramani wrote: I prefer Python for this conversion. Any idea is appreciated. In your source language, do you have tools to create AST? If not, then it would be the first thing to aim for. Then you need a mechanism to translate that AST to the target language specs. There is a lot of compiler theory involved in this problem, unless your source language really really very minimal (just I/O, conditional and looping) and in which case you do a literal translation to the other language and see it works. -- Senthil ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
Re: [BangPypers] Language Parsing and output generation
I could make a grammar compiled myself. I will look into SPARK.. Anybody has experience in pyparsing http://pyparsing.wikispaces.com/ ? Under Examples http://pyparsing.wikispaces.com/Examples Python language example is promising. Regards, Gopal On Mon, Aug 22, 2011 at 11:25 PM, Noufal Ibrahim nou...@gmail.com wrote: Gopalakrishnan Subramani gopalakrishnan.subram...@gmail.com writes: Source language IO is very limited and it has functions to map to IO and UI. As a total, they have around 100+ function. Those can be easily done in Lua. [...] For a project in one of my earlier companies, I used SPARK[1] to write a little parser for a language of my own making to used to specify some conditionals. The parser would convert this into a python expression which could be evaluated with some objects to return a true or a false. If you have the grammar of your source language at hand, it's a fews hours job to write a parser for it using SPARK. Once you do that, you have to write a backend to convert it into LUA which might be a little more complex but not impossibly so. Footnotes: [1] http://pages.cpsc.ucalgary.ca/~aycock/spark/ -- ~noufal http://nibrahim.net.in An empty cab drove up and Sarah Bernhardt got out. -Arthur Baer, American comic and columnist ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
