Re: Order of logical operations

["James Van Buskirk" <not_valid@comcast.net>]

"Arjen Markus" <arjen.markus@wldelft.nl> wrote in message
news:40C0208A.80DBE53A@wldelft.nl...

> Short-circuiting does not necessarily lead to quicker programs.
> And if you really need it, you might invent a new operator,
> like ".cand." (the implementation ought to be very simple).

As others have pointed out such operators have to be defined
at the language level.  Short-circuiting operators are trickier
in Fortran than in Ada because to be consistent with the rest
of the language they would have to be elemental.  Most of the
tricky stuff has already been dealt with, however, because
Fortran already has masking constructs (WHERE) and there are
only a few new cases left like:

a(x) .and_then. b(x)

when a(x) is array-valued and b(x) is scalar.  I am curious
as to how useful short-circuiting logical operators are
considered to be in languages such as Ada that have both
short-circuiting and non-short-circuiting operators.

-- 
write(*,*) transfer((/17.392111325966148d0,6.5794487871554595D-85, &
6.0134700243160014d-154/),(/'x'/)); end