Re: tables

[Luiz Henrique de Figueiredo <lhf@...>]

>Suppose I have a table:
>
>Config = {
>  Dir = "somestring/",
>  File = "somefile"
>};
>
>Is there a way to access the value of "Dir" while
>initializing "File".

Sorry, no.

>This problem comes up often in my use of Lua.  Other examples:
>
>Config = {
>  Pos = { 0, 1 },
>  Window = mainwindow{ Offset = would_like_to_use_pos }
>};

You can try something like

do
 local pos= {0,1}
 Config = {
   Pos = pos,
   Window = mainwindow{ Offset = f(pos) }
end

Or you could use constructors that fill some fields based on the values of
other fields. Your first example would be

function config(t)
 if t.dir then t.File=t.dir..t.File end
 return t
end

Config = config{
  Dir = "somestring/",
  File = "somefile"
}

The syntax f{} was created exactly for this use.
--lhf