Re: [sv-bc] nettype

Daniel,

You are trying to treat "wire" as part of the type. But that isn't the
way that the LRM treats "wire" at all. As just one example, "wire"
isn't a type that can be passed through a type parameter. The nettype
change is not intended to change that kind of relationship. "nettype"
works in a manner that is the same as "wire" -- the kind of the
declaration (variable, wire, nettype, etc) isn't part of the type, it is
related to the object being declared. So one can parameterize the data
type, but not the kind of the declaration.

In your example, you certainly can have:
    wire mytype w;
and in fact if you have a parameterized module, you could have:

     module m #(type T);
         wire T w;
     endmodule

But there is no way to parameterize the wire/variable decision.

The nettype work is not intended to address what I think you are
requesting. User defined nettypes merely provide a symmetric mechanism
as "wire" but with more interesting data types for each "pin".

Gord.

On 12/5/2011 6:39 AM, Daniel Mlynek wrote:
> No i want simple feature equals to what can I do for data types.
> Ie I want do declare a net with a data type and predefined net type
>
> wire logic [3:0] w;
>
> Assume that I'm using such pair in many places and I want to change
> the net type - to do so I would have to find each interesting
> occurrence and do the change is I could :
>
> typedef_net wire mynet;
> typedef reg[3:0] mytype;
> mynet mytype w;
>
> then all I need to do is to change mynet declaration.
>
> Same idea like for types
>
>
>
> DANiel
>
>
> On 12/5/2011 3:26 PM, Francoise Martinolle wrote:
>> I am trying to understand what you want to achieve.
>> Do you want to "redefine' the already predefined nettype "wire" and
>> use its
>> predefined resolution for the logic datatype?
>>
>> Francoise
>> '
>>
>> -----Original Message-----
>> From: owner-sv-bc@eda.org [mailto:owner-sv-bc@eda.org] On Behalf Of
>> Daniel Mlynek
>> Sent: Wednesday, November 30, 2011 3:09 AM
>> To: sv-bc@eda.org
>> Subject: [sv-bc] nettype
>>
>> sv2012 adds nettype: mantis: 3398 . Extension define in this mantis
>> add more possibilities but I was thinking about smth simpler.
>> Now I do not have a way to define smth like typedef on net_type to
>> achieve declaration like:
>>
>> typedef_net wire mynet;
>> typedef reg[3:0] mytype;
>> mynet mytype w;
>>
>> mantis 3398 will also wont help me.
>>
>> DANiel
>>
>>
>> --
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>>
>>
>

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Gordon Vreugdenhil                                503-685-0808
Model Technology (Mentor Graphics)                gordonv@model.com
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