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- Subject: Re: ANN: luaSub 0.41 syntax front-end
- From: "steve donovan" <steve.j.donovan@...>
- Date: Wed, 23 Jan 2008 10:59:49 +0200
On Jan 23, 2008 8:56 AM, Fabien <email@example.com> wrote:
> (It describes how a seemingly trivial catch...with extension is not so
> trivial after all, if you want to make it usable).
Ouch! I found this problem as well when writing proper tests (;)) for
LuaMacro. The hack is to detect if any non-nil value is returned, but
it leaves this rather important 'corner' case broken:
print 'gets here!'
So, point taken; for anything non-trivial you have to parse the code!
Also, the general point is that syntax extensions have to be as robust
as any other language feature is well taken. Another moral: if you
have to know the limitations of a preprocessor, it is broken (cpp is
case in point)