Re: EXTERNAL: Re: [vhdl-200x] Update to proposal for arbitrary integers

> Another use case for this is when we are modelling memories, one
> could possibly apply the to_integer function on an address bus to
> read contents of a memory. For example:
> 
> q <= rom(to_integer(addr)) when rising_edge(clk);
> 
> If "addr" contains 'X's, then zero would be returned. Yes, the
> simulator would warn us of a meta-value detection, but wouldn't it
> be better if the to_integer were to return something that
> corresponds to NaN for example? I think seeing a red line on the
> databus in simulation whenever the address lines are invalid would
> give the designer better insight to what went wrong, as compared to
> a few warning messages.

But then the simulation would immediately stop as 'rom(NaN)' is not
defined.

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