[antlr-interest] line number counter reset

[Ric Klaren]

On Sat, Feb 15, 2003 at 07:40:22AM -0000, tdknghi <nk.truong at student.qut.edu.au> wrote:
> I would like tracking the line number in my program when parse Java 
> program. I wrote a class to extend antlr.CommonAST then instruct the 
> parser to use my custom AST type rather than the default AST node 
> type. I have everything work beautifully except one problem. I 
> attach all the files together with the description so that you could 
> get a better idea of what goes wrong.
....
>  a. The line number of the "ScreenWriter token" (type one) suddently 
> reset to 0 (the correct line number should be 5), but the line 
> number of the token "writer" is correct which is 5. The rest of 
> tokens in that line is correct.
>  b. Similarity  with the line int i = 5; the line number of the 
> token "int" is reset to 0 but the line number of toke "i", "=", "5" 
> is correct.

You have to set line numbers manually on manually created tokens (and
there's a lot of manually created stuff in the java grammar). At least that
is my guess.

>  I have done several tests. the line number only reset for the first 
> token of the variable declaration line only. 

My guess is that you can fix this particular one by meddling a bit with the
variableDeclarator rule. (e.g. copy line info of the modifiers into the
synthetic node VARIABLE_DEF etc.

Cheers,

Ric
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