lua-users home
lua-l archive

[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index] [Thread Index]

> Lua and its API (lua_tostring() lua_tonumber()) does automatic
> conversion between numbers and strings representing numbers.
> This symmetry seems to be broken for special floating point
> values representing +/- infinity or various "not a numbers".
> [...]
> Why?

Lua uses C to do the conversions (sprintf/strtod). In my system, your
code runs as you expect:

  > infinity = 1/0
  > print(infinity)
  > print(math.sin(infinity))
  > print(math.sin("inf"))

But it seems that not all C implementations do that...

-- Roberto