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- Subject: Re: abs_index
- From: Edgar Toernig <froese@...>
- Date: Wed, 29 Sep 2004 20:27:27 +0200
David Jones wrote:
>
> On Sep 28, 2004, at 21:07, Roberto Ierusalimschy wrote:
>
> >> #define abs_index(L, i) \
> >> ((i) > 0 || (i) <= LUA_REGISTRYINDEX ? (i) : \
> >> lua_gettop(L) + (i) + 1)
> >>
> >> How about including it into the lauxlib.h or maybe lua.h?
> >
> > The problem is that it uses `i' several times. For a generic,
> > "official" macro, this is not too polite.
>
> How about a function then? The functionality is useful. I agree that
> you wouldn't want to bless macros like this.
Why not switch the implementations? lua_absindex is the low-level
function and lua_gettop is #defined as lua_absindex(L, -1).
Ciao, ET.
