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- Subject: Re: "with" statement in Lua?
- From: Luiz Henrique de Figueiredo <lhf@...>
- Date: Tue, 13 Jul 1999 11:00:18 -0300 (EST)
>From email@example.com Tue Jul 13 02:59:53 1999
>From: Dave Bollinger <DBollinger@compuserve.com>
> Back in the list archives there are several threads about pointer
>aliasing, caching pointers to objects, and such - essentially describing
>the functionality of Pascal's "with" statement.
There's no way this can work given Lua's table semantics: there's no notion
of a field being present in a table, because tables are dynamic.
In other words, there's no way you can "test" whether "v" may refer to a field
in a table and not to a global variable, because it's legal to write t.v.
with t do
would not work. Which of the three a,v,w are global?
unless you write something like:
with t do
(which is ambiguous because it conflict with w=a.v)
Plus, if you're writing .w, why not write t.w?