Subject: PROPOSAL (BNF) for empty tf_port_list (Was: [sv-bc] task/function_declaration with empty port_list)
From: Brad Pierce (Brad.Pierce@synopsys.com)
Date: Thu Nov 13 2003 - 09:38:35 PST
Yes, this is a bug in the BNF, not in the example. Already in V2K,
many tools (e.g., NC-Verilog and VCS) support empty port lists in the
declaration of user-defined tasks with no arguments.
Attached is a proposal to fix this bug.
-- Brad
-----Original Message-----
From: owner-sv-bc@eda.org [mailto:owner-sv-bc@eda.org]On Behalf Of Karen
Pieper
Sent: Wednesday, November 12, 2003 2:35 PM
To: sv-bc@eda.org
Subject: Fwd: FW: [sv-bc] task/function_declaration with empty port_list
>From: Hermann.Ilmberger@infineon.com
>X-Authentication-Warning: server.eda.org: pieper set sender to
>Hermann.Ilmberger@infineon.com using -f
>To: owner-sv-bc@eda.org
>Subject: FW: [sv-bc] task/function_declaration with empty port_list
>Date: Wed, 12 Nov 2003 15:18:55 +0100
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>Hi,
>I sent this to the list two days ago, but it never made it. I am member of
>the list.
>Best regards,
>-Hermann
>Hermann Ilmberger, Infineon Technologies AG
>
>-----Original Message-----
>From: Ilmberger Hermann (CL DAT TDM VM)
>Sent: Monday, November 10, 2003 3:32 PM
>To: sv-bc@eda.org
>Subject: [sv-bc] task/function_declaration with empty port_list
>
>
>Hi,
>
>is this a bug in the formal syntax of SV3.1?
>The formal syntax for function_declaration does not allow
>
>function juhu(); // with empty function_port_list
>...
>endfunction
>
>However, it seems that this is desirable for functions that
>do not take arguments. Examples appear in section 11.3:
>
>class Packet;
>function new();
>...
>endfunction
>task clean();
>...
>endtask
>endclass
>
>However, in 19.6.2:
>import task slaveRead(),
> task slaveWrite());
>This is o.k. since named_function_proto allows an empty
>list_of_function_proto_formals.
>
>Section 10.5.5 "Optional argument list" seems to refer only to
function/task
>call and
>not to declaration.
>
>Cheers,
>-Hermann
>Hermann Ilmberger, Infineon Technologies AG
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