[Swig-devel] Re: Line number infelicities

[Olly B. <ol...@su...>]

I was just clearing up my SWIG CVS directory and noticed that this issue
was never resolved.  But I've had a poke and worked out what's going on.
I can't see how best to fix it though...

Olly Betts wrote:
>Process this with CVS swig using "swig -python lineno.i":
>
>%module lineno
>syntax error!
>
>And you get:
>
>lineno.i:2: Error: Syntax error in input(1).
>lineno.i:6: Error: Missing semicolon. Reached end of input.
>
>The second error message claims to be at line 6, but the file only
>has 2 lines!

Marcelo Matus wrote:
>but you have 4 empty lines....

Olly Betts wrote:
>No, I thought of that and double-checked - the file contains just those
>2 lines.
>
>$ wc -l lineno.i
>2 lineno.i
>
>Did you try to reproduce this and fail?

Marcelo Matus wrote:
> yes, it add 4 lines and I don't know from where

What's happening is that the scanner is running off the end of lineno.i
and into the "]" bit of the fake file which includes it:

  %includefile "lineno.i" [
  <...>
  ]

If you watch the characters the scanner is reading, the syntax error is
actually reported after reading the ']'.

Hopefully now someone else can see how this can be fixed...

Cheers,
    Olly