develooper Front page | perl.perl6.language | Postings from February 2004

Re: Exegesis 7: Overflow Fields

Thread Previous | Thread Next
Damian Conway
February 28, 2004 14:07
Re: Exegesis 7: Overflow Fields
Message ID:
Gregor N. Purdy wrote:

> So, what I'm looking for is more explicit phrasing around "immediately
> above". In the example, the column range for the overflow field is
> exactly the same as that of the $method field in the prior "picture".
> But, what does it do if it doesn't match *exactly*? Is it an error,
> does it have some heuristics to guess? What are the edge cases?

It's implementation-defined. And the implementation currently does this:

     * Compare the span of the overflow field with the spans
       of each field in the previous format.

     * Each preceding field that overlaps the overflow field in any
       way (i.e. that spans even a single column spanned by the
       overflow field) is a candidate.

     * The left-most candidate is taken as the field to be overflowed

     * A warning is issued if there are two or more candidates, unless
       all the candidates have the same data source.


Thread Previous | Thread Next Perl Programming lists via nntp and http.
Comments to Ask Bjørn Hansen at | Group listing | About