Re: Line numbers reported by the byte compiler

[Colin Walters]

Richard Stallman <address@hidden> writes:

>     What line is the byte compiler supposed to report with the messages
>     it prints?  Is that the exact line where it found the problem, or
>     maybe the first line of the function where the problem happens?
>
> It is the first line of the function.  That is the only data it can
> get.

We could modify Fread to optionally return character positions in the
stream of the components of the form it reads, perhaps by recursively
substituting every form with (form . position), in the way
Fread_from_string does.  This would be generated by an optional
argument to Fread, or perhaps a new Fread_with_positions function.