Re: [ANN] Lua 5.2.0 (work1) now available

[Rene Rebe <rene@...>]

On 09.01.2010, at 15:58, Miles Bader wrote:

Rene Rebe <rene@exactcode.de> writes:

No. But given that Lua (reasonably) defaults to double I expect to be

able to use them reasonably. And not to trap into a surprising result

in every line:

-- lua-5.2(work1)

= bit.band(0xffff / 256, 0xff)

255

There are better ways to write that, and you should use them...
expecting fractions to silently be dropped is just plain dodgy.

[e.g., = bit.band (bit.rshift (0xffff, 8), 0xff) ]

I know this and all the details. Been there, done that.

I already wrote that the concern is about least surprise and coding style. I do not consider using bit.Xshift or math.{round,ceil,floor} everywhere to be especially beautiful nor readable (reviewable, maintainable) code. This undefined, yet unexpected behaving rather leads to mistakes rather sooner than later.

-- 

  René Rebe, ExactCODE GmbH, Jaegerstr. 67, DE-10117 Berlin

  http://exactcode.com | http://t2-project.org | http://rene.rebe.name