Re: predefined constants

[Rici Lake <lua@...>]

On 24-Jul-04, at 3:55 AM, Adrian Sietsma wrote:

> 3/ use strings
> if s == "STATE_1" then ...... end
>
> still reads nicely, but are all those string comparisons going to cost 
> much ?

They are almost free. The strings are interned at compile time so the 
string comparison is just a pointer comparison.


> any other suggestions ?


local case = {}
function case.STATE_1(x, y) -- do something -- end
function case.STATE_2(x, y) -- do something else -- end
-- etc.

function do_state(state, x, y) return case[state](x, y) end

-- expand on this model as appropriate.