On Sat, Dec 22, 2007 at 08:59:11AM -0500, John Belmonte wrote: > On Dec 22, 2007 4:15 AM, Asko Kauppi <[EMAIL PROTECTED]> wrote: > > - If 'arg' is being phased out at some point (it no longer is needed > > for anything, really) how to give the unlimited functionality to > > '...' at the chunk level? > > > > - If 'arg' remains, it could work "unlimited" whereas the '...' way > > would carry the limits. > > To me the solution is simple-- the command line arguments should be > available as a list via select(1, ...). In other words the standard > Lua interpreter passes command line args to the chunk as a list > argument-- no magic involved.
If you want a chunk (a function) to be called with '...' set to a long list, you have to do lua_call(L, n, 0) where n is the number of arguments, and these arguments must be on the stack. T hus passing a long '...' requires a long stack. Passing to the chunk a single table 'arg' costs just 1 stack slot (actually you need three slots to fill the table, but it is still a constant not depending on the size of the table). The lua interpreter, in function getargs() line 114 file lua.c does both. I see no way to pass to a function more arguments than the ones that can be pushed on the stack. I believe the upstreams will drop the idea of representing arguments passed to a script using '...' and fall back to the 'arg' table (as it was in lua5.0 IIRC). Cheers -- Enrico Tassi -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
