Re: [NoW] Inf-phobia of Lua bytecode

[Alexander Nasonov <alnsn@...>]

Egor Skriptunoff wrote:
> I've noticed that Lua never stores floating point values inf, nan, -0.0 in
> bytecode (in table of constants).
> Example:
>    local x = 5/4  -- constant 1.25 due to constant folding.
>    local y = 1/0  -- constants 0, 1 and DIV instruction.
>    local z = -0.0 -- constant 0.0 and UNM instruction.
> It seems that Lua intentionally defers possible FP errors until run-time.
> Why such approach was implemented?

I don't know about Lua but when I wrote code to generate x86 assembly
off a custom bytecode, the fact that all constants were finite numbers
was very handy.

-- 
Alex