Re: how to do bit-wise operation on none modular types?

[Samuel Mize <smize@imagin.net>]

fraser@synopsys.synopsys.com.com wrote:
> I nearly cried when smize@imagin.net said:

Gosh, I didn't mean to upset you.  Maybe you should speak to Niles.

>>Do you get some advantage from the "more direct route" that compensates
>>for it being somewhat less clear?  I would expect the type conversion
>>to be a "view conversion" (terminology check) and so not to require
>>a copy, so both code fragments would be equally efficient.
> 
> Do you find 'X mod 16#1_0000#' less clear than 'X and 16#FFFF#' (or even
> 'My_Mod (X) and 16#FFFF#'?  I'm quite the reverse.  I'm glad that the
> bitwise operations on modular types are part of the language now, but
> they still seem, um, low level.

Depends on what you're doing.  The original question referred to a "status"
value.  I've seen those (in C) as enumerated integers, and as bitmaps.

For a bitmap, I prefer a syntax that makes it clear I'm viewing that
value as a series of bits ("and").  For an integer, I'd use a syntax
that makes it clear that I'm viewing the value as an integer ("mod").

Best,
Sam Mize

-- 
Samuel Mize -- smize@imagin.net (home email) -- Team Ada
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