v 0.4

...It starts to be slowly time for a repository. I guess it is the last time I put up code like this.

Anyway, now you've a nice parser to play with.

Instructions

> ghci Main.hs

To parse some code:

> main

To parse a syntax file:

> main_syn

Global process

1. Write your own grammar corresponding to the 'Grammar' data type
2. Call makeGrammarParser giving your grammar as input to obtain a parse function (at run time!)
   
3. Apply this parse function to a stream to obtain the corresponding parse tree according to this grammar
   

Remarks

• defining syntax in bodies is now supported
• declarative syntax definition, very easy to change it
• no more tokenizer, scannerless
• spaces are important, they delimit the tokens
• things like "@%*!" are valid symbols (try it!)
• operator priority not taken into account because we expect that operators can be defined in the code, so it must be determined in a later step