[Grammatica-users] Trying to disambiguate a grammar

[Craig Ugoretz]

Hello,

 

     I am new to grammatica (and parsers in general) and I have a grammar that I am trying to disambiguate.  Can anyone lend any advice?  Hopefully, this should get me on the right track with the rest of my work...  I apologize for the notation - it is EBNF, but nonstandard (and non-grammatica).

 

<int> ::= ['~'] <nzdigit> { <digit> }

         |  ['~'] O { <octdigit> }+

         |  ['~'] ('0x' | '0X') { <hexdigit> }+

         |  ['~'] ('0b' | '0B') { <bindigit> }+

<float> ::= ['~'] { <digit> }+ '.' { <digit> } { ('e' | 'E') ['~'] { <digit> }+

<digit> ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

<nzdigit> ::= 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

<octdigit> ::= 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7

<hexdigit> ::= <digit> | 'a' | 'b' | 'c' | 'd' | 'e' | 'f' | 'A' | 'B' | 'C' | 'D' | 'E' | 'F'

<bindigit> ::= 0 | 1

 

Can proper tokenization alone with regular expressions lend itself to disambiguating the grammar?  This was a tactic that I tried, but was not familar enough with regular expressions to make progress.