On Tue, Sep 25, 2012 at 11:58:00PM -0600, Stephen Warren wrote:
> On 09/25/2012 10:34 PM, David Gibson wrote:
> > On Mon, Sep 24, 2012 at 04:51:17PM -0600, Stephen Warren wrote:
> >> From: Stephen Warren <[email protected]>
> >>
> >> Line control directives of the following formats are supported:
> >> #line LINE "FILE"
> >> # LINE FILE [FLAGS]
> >>
> >> This allows dtc to consume the output of pre-processors, and to provide
> >> error messages that refer to the original filename, including taking
> >> into account any #include directives that the pre-processor may have
> >> performed.
> >
> > I like the idea of handling line directives, whichever way we go with
> > the other cpp-related proposals. The fact that these are
> > distinguished from a propnodename beginning with # only by the
> > following digits is more subtle than I'd ideally like, but I think
> > it's wirth it.
> >
> > The only thing I would like to see change is to only recognize line
> > directives at the beginning of the line (in fact, preferably in column
> > 0 only). Unfortunately that is going to mean some mucky flex work,
> > including a new start state, I expect.
>
> That turns out to be exceedingly easy; just put ^ at the start of the
> regex (after the start state specification), and Flex takes care of
> everything:-)
Oh yeah, I forgot about ^ :). I like it when things turn out easier
than expected :).
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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