From: "M. Edward (Ed) Borasky" <znmeb@...>
Date: 2006-10-11T21:50:18+09:00
Subject: Re: scanning strings, backward?

Bil Kleb wrote:
> Hi,
> 
> I would like to automate a code cleanup task which involves
> finding warning messages like,
> 
>  Warning: ../../LibF90/bc_inviscid.f90, line 1707:
>   DT explicitly imported into BC_INVISCID_FLUX but not used
>  detected at BC_INVISCID_FLUX@<end-of-statement>
> 
> and removing the offending unused import.
> 
> So, the tasks are roughly,
> 
>  1) Goto line 1707 of the file
>  2) Search backward until line.match /\Wdt\W/i
>  3) Remove /dt/i
> 
> I'm stuck on an elegant, i.e., Ruby, way to do the first
> two steps.  Please point me toward the glittering light.
> 
> Thanks,
> -- 
> Bil Kleb
> http://fun3d.larc.nasa.gov

Wait a minute ... is the file you're editing always a Fortran source?
Why not just comment out the offending line rather than removing it?
Otherwise, removing a line changes the position number of every line
following it.
> 
>