Re: Checking variable scope

[Jim Blandy <jimb@codesourcery.com>]

"Rob Quill" <rob.quill@gmail.com> writes:
> I am trying to make it possible to be able to check if a variable is
> in scope at a given time. My current implementation for this involves
> adding a parameter to parse_expression, and the parsing functions it
> calls, all the way until it gets to the line:
>
> if (sym == 0)
>    error ("No symbol \"%s\" in specified context.", copy_name ($3));
>
> in c-exp.y
>
> as which point it doesn't call error, but calls another function which
> returns a value signifing that the variable is not in scope.
>
> Whilst this is OK, in that it (should) work, I was wondering if anyone
> had a neater way of implementing it?

Why not call lookup_symbol directly?  You can get the block that needs
with block_for_pc_sect.  Are you selecting the location by source
position, or PC, or what?