Parser for cmd language?
eric.pouech at orange.fr
Sat Dec 19 01:47:50 CST 2009
Dan Kegel a écrit :
> On Thu, Dec 17, 2009 at 8:32 PM, Dan Kegel <dank at kegel.com> wrote:
>> bison it is, then.
> I'm thinking of having some ucla students do this, and it
> occurred to me that using "ply" might be a good way to start.
> ply is a nice lex/yacc implementation written in python that
> sounds good for prototyping. Once the grammer is far enough along,
> it'd be pretty easy to switch to c.
> Maybe I'll noodle around with ply and see if I can implement a
> subset of cmd's language with it. Here's a tiny toy start:
> ply home page:
> example of use of ply in compiler course:
beware that the integration of the parser in the current source code (ie
splitting in several small patches) can be tedious
so I'd rather see:
- implement the parser to be usable command by command (ie from first
word, to trigger either the old parser or the yacc one, or something
- when all commands are done, then switch to the global parser mode
I don't think writing the grammar itself will be very complicated, but
wiring all the code to the grammar will be more tedious
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