[PATCH] Add PAREN_EXPR

[Dominique Dhumieres]

> I would vote for -ffast-math to disable it.

Please don't. I think parentheses should be obeyed in FORTRAN.
-ffast-math groups several useful optimization for usual codes
and I don't see why users should have to remember their names
if they want to keep mandatory parentheses.

Now I also think one should think twice (at least!) before
introducing a new option (some day I'll rant against their 
number).

Dominique