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- Subject: Re: expression parser change
- From: Roberto Ierusalimschy <roberto@...>
- Date: Fri, 17 Dec 2010 10:51:34 -0200
> The point is to get rid of prefixexp folding it into simpleexp.
> The prefixexp rule just limits the syntax without any reason.
>
> [...]
>
> Of course, it's 100% backwards compatible.
It is not...
The following chunk has the same meaning in 5.1 and 5.2 alpha,
but gets a different meaning with this change:
a = nil
(print or io.write)(a)
-- Roberto
