Translating Version 3 to Version 4

[Robert Eberhart]

I have a number of fragments in an Oracle grammar that I'm trying to translate to ANTLR V4 with a target of C#.  The original target was C.  

These fragments have a basic format that looks like this:

r_unique : r='UNIQUE' { $r->setType($r, T_RESERVED); $r->user1 = T_RESERVED;  }  ;

UNIQUE: 'UNIQUE';

I cannot complete discern the intent here so that I can translate this to ANTLR v4.  From what I can tell, the author was creating a new fragment derived from UNIQUE.  He associates UNIQUE with the variable r and injects C code that sets the type of the fragment to the type of T_RESERVED.  I'm not sure where the author defines or gets user1 from.

If anyone has an idea of what the intent is here and can explain it to me, I would be appreciative.  

- Robert Eberhart

[Terence Parr]

Hi. I think that the person was trying to say that in a particular context UNIQUE is a reserved word not a variable. there are better ways to handle this. I believe we have something about keywords as variables in the wiki (v3) or in the new book.

T

Robert Eberhart

July 2, 2013 10:03 AM

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[hirntot...@gmail.com]

Thanks for the input. I was able to find that section in the book.

- Robert Eberhart

On Tuesday, July 2, 2013 1:29:53 PM UTC-4, the_antlr_guy wrote:
> Hi. I think that the
> person was trying to say that in a particular context UNIQUE is a
> reserved word not a variable. there are better ways to handle this. I
> believe we have something about keywords as variables in the wiki (v3)
> or in the new book.
>
>
>
> T
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