Command line options and pragmas

[Robert Dewar]

DJ Delorie wrote:

> I had thought of keeping a table of pragma-settings-by-line-number
>
>and, for diagnostics with line number information, doing the lookup to
>see what was in effect at that line.  But the complications are worse
>than the benefits.
>  
>
Can you explain the complications you see. This seems like the way to go
to me, because it guarantees that the effect is precisely what the 
programmer
has asked for.