[antlr-interest] Cobol number question

[Putrycz, Erik]

I'm currently working on a COBOL grammar and I'm stuck with the
following case:

COMPUTE M-INTEREST = INTEREST / 12. 

The DOT at the end is the end of the instruction not a decimal dot.

I based my grammar on the python one (that has nice indentation
handling) and my numbers rule is the following:

NUMBER

            :           

            (           NonZeroDigit (Int)?

                        (           FloatTrailer {$setType(FLOAT);}

                                    |           {$setType(INT);}

                        )

            )                                   

    |   '.' {$setType(DOT);} // DOT (non number; e.g., field access)

            ;

 

protected

FloatTrailer

            :           '.' Int

            ;

 

The FloatTrailer fails with unexpected char: 0xA at the end of the
line... Obviously the second alternative of the NUMBER is not
considered... I'm not sure how to handle this properly. I would like to
keep in the parser that the instruction ends with a DOT.

 

Anyone would have an idea?

 

Thanks,

 

Erik Putrycz, Ph.D - Research Associate /
<mailto:erik.putrycz at nrc-cnrc.gc.ca> erik.putrycz at nrc-cnrc.gc.ca / (613)
990 0681

Institute for Information Technology - Software Engineering Group

National Research Council, Canada - Building M-50, 1200 Montreal Road

Ottawa, Ontario, CANADA K1A 0R6

 

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