[nem-en] Re: Nemerle try catch behaviour

[Snaury]

Hi everyone,

I figured out how to make quotation syntax work and here's a new patch:

http://snaury.googlepages.com/nemerle-experimental-try-catch-2006-07-31.patch

Now you can match try with all cases like this:

match (expr) {
  ....
  | <[ try $body catch { .. $cases } ]> => ....
  ....
}

HOWEVER, I didn't know where and how to properly put error checking
for using such a syntax outside of quotation, this:

try { } catch { .. $cases }

Will currently ice in typer. On the other hand, found while looking
for maybe example from match, when you write:

match (expr) { .. $cases }

You'll get NullReferenceException somewhere in the compiler, so I'm
not sure whether ice'ing is that bad. ;)

P.S.
Seems like major problems solved and I'm ready to commit, but need
someone to accept it first (since change might be braking for macros
that match on PExpr/TExpr) or tell me what needs to be changed.
Michał, Kamil, Paweł?
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