Re: [Iverilog-devel] bugs/enhancements in iverilog

[Stephen W. <st...@ic...>]

It makes sense to be strict about the syntax. There are likely lots of
people who learn Verilog syntax from Icarus Verilog behaviors.

The "@ *" vs. "@*" might be construed as an actual bug. If that's the
case, then I would suggest NOT accepting the extended version, even in
a generous mode. However, you are really going to have to convince me
that @* is a single token. Pretty sure that is not the case. The
standard has in the beginning an exhaustive list of all the lexical
tokens, and @* is not listed there. Also, consider that @* and @(*)
are specifically called out as valid.

On Mon, May 11, 2020 at 12:38 AM Cary R. via Iverilog-devel
<ive...@li...> wrote:
>
> I have found a couple things that could be considered enhancements, but are clearly not supported by the standard. My question is should we have these enhancements controlled by a flag of some sort so people can restrict Icarus to only accept what is supported by the standard? For example pullup/pulldown should only support a single port. @* is really a single token and the binary ~& and ~| are not in the standard. There may be more. Is some new strict flag the correct thing for this? I think @* not being a single token is a bug and probably should be fixed. I'm personally of the opinion only standard/commonly supported functionality should be enabled by default and an extension flag should be used to enable the rest of this if it is kept.
>
> This would likely require reworking some of the tests to pull out the enhancements to have them be in a separate file.
>
> Thoughts?
>
> Cary
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