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Subject: 'class' not implemented??
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marco.stanzani
Posts: 11
Online: User is Offline
5/18/2007 6:30 AM  
Hi there
I am compiling a class getting

ncvlog: *E,SVNIMP (/prj/so_asic/USERS/STANZANI/SO_ASIC/CONFIG/../DIGITAL/SIMULATION/TBENCH/so_i2s.v,52|17): SystemVerilog construct not yet implemented:  compilation unit top scope declaration.
class so_i2s_layer;

I am using version

ncvlog -ver
TOOL:   ncvlog  05.83-p002

how can it be claimed 'system verilog support' if classes (a key feature for SV) is not usable?

thanks
Marco Stanzani Accent S.p.A.
Sr. Consultant Engineer via Torri Bianche 3
Tel. +39-039-6290020 20059 - Vimercate (MI), Italy
stephenh
Posts: 77
Online: User is Offline
5/18/2007 6:42 AM  
Hi Marco.

At the moment, classes must be declared within a package, module or program.
They're not permitted to "float" at the top level, hence the message you saw.

I'd suggest you put any global classes into a package, and import that into whichever unit requires them.
This makes for tidier encapsulation anyway :-)

One last point, if you're using SystemVerilog, you'd do best to keep to the latest version, as that will have the best feature set. Currently the latest version is IUS6.1s2.

Steve.
Steve H.
marco.stanzani
Posts: 11
Online: User is Offline
5/18/2007 6:54 AM  
Thanks Stephen
agree that the ebst practice is to put them in a package. BTW it does not seems possible to define interfaces in a package as well (which is desirrable, IMO, sicne I'd put i a package everything that does not generate istances: right?)

actually whe have just this version @Accent

cheers
Marco Stanzani Accent S.p.A.
Sr. Consultant Engineer via Torri Bianche 3
Tel. +39-039-6290020 20059 - Vimercate (MI), Italy
bryan
Posts: 25
Online: User is Offline
5/18/2007 7:05 AM  
FWIW: Interfaces are more like a module. They are instanced, etc and many tools even search for them like modules if you use the -y directive. So I would not think putting them in a package would be a good thing.
Regards,
Bryan
ajeetha
Posts: 97
Online: User is Offline
5/18/2007 7:48 AM  
Posted By stephenh on 5/18/2007 6:42 AM

At the moment, classes must be declared within a package, module or program.
They're not permitted to "float" at the top level, hence the message you saw.

Steve.
Maybe it is worth adding that suggestion to the existing Error message as that would help the users in general a lot. How does one submit such "nice to have enhancement" if not via sourcelink? FWIW - I don't have sourcelink access as I'm not a NC customer but am running a verification services company in Bangalore.

Regards
Ajeetha, CVC
www.noveldv.com
stephenh
Posts: 77
Online: User is Offline
5/18/2007 7:56 AM  
Hi Ajeetha.

I'll file that enhancement request - it makes sense.
If you're using Cadence tools when working for your clients, I guess the best thing is to get your client to file the service request under their SourceLink account ID. There may be an alternative way that you can file them directly, but I'm not aware of it.

Regards.
Steve.
Steve H.
tpylant
Posts: 87
Online: User is Offline
5/18/2007 8:18 AM  
I filed enhance to improve error message. Thank you for the suggestion.

Tim
ajeetha
Posts: 97
Online: User is Offline
5/19/2007 8:56 AM  
Thanks Tim & Steve, glad to see the quick action to make the tool easy to use, appreciate it!

Cheers
Ajeetha, CVC
www.noveldv.com
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Forums > Functional Verification > SystemVerilog > 'class' not implemented??


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