Just my $0.02: > (1) Can one declare extern task and extern functions in a > package? A tried > to follow the BNF for the answer and I think I found a BNF-thread that > wound its way through some type of class-item to make this legal, but > thought I would ask the group. Don't know - interesting question. > (2) Can a package with useful typedefs be wildcard-imported (or even > specific pkg::typedef imported) before it is needed for > ANSI-style ports? For sure: just put the import statement at the top level of the file, so that it's imported into the compilation unit scope. This provides a really clean way of applying a bunch of declarations to more than one compile - far better than requiring that the compilation-unit scope span more than one file. Each file has its own imports, and stands alone. > Do I have to use Verilog-1995 style ports in order to get a package > imported before the typedefs are referenced? No; I use file-level imports extensively for exactly this. Must be my inner VHDL-programmer leaking out :-) > (3) Is the group of the general opinion that we are moving away from > $root/$unit global typedefs and task/function declarations in favor of > packaged and imported copis of the same? (Methodology-opinion > question) Again, just my opinion: if something's worth declaring at the file level, it's interesting to more than one module and therefore it's worth putting into a package. So, although I have no idea what the "general opinion" is, I would surely lean towards using packages wherever it makes sense. Of course, if you import a package (or any definition) into the compilation unit scope, that's tantamount to declaring it right there at the compilation-unit level. But you centralise the declaration(s) in the package, which has to be a good thing. -- Jonathan Bromley, Consultant DOULOS - Developing Design Know-how VHDL * Verilog * SystemC * e * Perl * Tcl/Tk * Project Services Doulos Ltd. Church Hatch, 22 Market Place, Ringwood, Hampshire, BH24 1AW, UK Tel: +44 (0)1425 471223 Email: jonathan.bromley@doulos.com Fax: +44 (0)1425 471573 Web: http://www.doulos.com This e-mail and any attachments are confidential and Doulos Ltd. reserves all rights of privilege in respect thereof. It is intended for the use of the addressee only. If you are not the intended recipient please delete it from your system, any use, disclosure, or copying of this document is unauthorised. The contents of this message may contain personal views which are not the views of Doulos Ltd., unless specifically stated.Received on Fri Aug 12 06:53:06 2005
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