Re: Why is type for string parameters mandatory?

Dave,

 From what i remember we created a new syntax for string parameters. I 
don't think string parameters exists in either 1364 or P1800 and the 
purpose for this was bit different to the registers specified in 1364. 
As Marq mentions this was specifically used so that model writes can use 
it in comparison functions or as arguments and control the value of the 
strings that can be used using the from/to parameter syntax.

Infact, the from/to syntax was also slightly modified to accommodate 
string parameters.

cheers,
Sri


Marq Kole wrote:
> 
> Dave,
> 
> Do these digital simulators use these string parameters as we do, or can 
> they assign these string parameters as default values to string registers?
> 
> As far as I can tell in AMS you can only compare string parameters 
> against string constants or other string parameters, or use them as a 
> string argument in display tasks. No connection is made between the 
> string parameters in AMS and the string registers in 1364-2005.
> 
> Does SystemVerilog have (extended) support for string parameters?
> 
> Cheers,
> Marq
> 
> 
> Marq Kole
> Competence Leader Robust Design
> 
> Research
> NXP Semiconductors
> 
> 
> 
> 
> 
> 
> 
> 
> *Dave Miller <David.L.Miller@freescale.com>*
> 
> Sent by:
> owner-verilog-ams@server.eda.org
> 
> 14-11-2006 18:22
> 
> 	
> To
> 	Verilog-AMS LRM Committee <verilog-ams@server.eda.org>
> cc
> 	
> Subject
> 	Why is type for string parameters mandatory?
> Classification
> 	
> 
> 
> 	
> 
> 
> 
> 
> 
> Hi all,
> I am just wondering why do we explicitly say that the type specification
> for a string parameter is mandatory?
> Why can't we allow the type to be derived based upon the default
> expression.
> Do you think we could remove this restriction in 3.2.1 and just mention
> that if no type is specified and the parameter is assigned a default
> value of a string, then the type of the parameter will be string and it
> will be an error if the parameter is overridden with any numerical value.
> This is causing me some problems at the moment as some digital
> simulators that I am using allow string parameters to be defined without
> the type. In fact if I understand digital correctly (2005) you can't
> actually have a string parameter (only string registers) but that is a
> separate issue.
> 
> Dave
> 
> -- 
> =====================================
> -- David Miller
> -- Design Technology (Austin)
> -- Freescale Semiconductor
> -- Ph : 512 996-7377 Fax: x7755
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> 

-- 
Srikanth Chandrasekaran
DTO Tools Development
Freescale Semiconductor Inc.
Ph: +91-120-439 7021 F: x5199