[self-interest] Re: Self parser.

Jecel Assumpcao Jr jecel at merlintec.com
Tue Oct 30 00:16:39 UTC 2001

On Monday 29 October 2001 12:19, Mikael wrote:
> Is it even possible to implement Self syntax as a BNF parser ?, it
> looks like it could be difficult ?

It isn't easy, but I think it is possible. The multiple uses of "." 
make a clean separation of parsing and lexical analysis a problem and 
the definition of "-" is pretty nasty.

The main problem is the implicit receivers and resends. You might want 
to check out the hand crafted parser (in C) I wrote in tinySelf 0 which 
includes my own Self BNF in the comments:


Unfortunately, it was easier for me to use a dirty trick to handle the 
implicit receivers and resends than to actually follow my own BNF all 
the way through.

Check out some other implementations like JSelf and OpenSelf:


-- Jecel

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