On 29 September 2017 at 15:10, Brandon Allbery <allber...@gmail.com> wrote:
>
> (And, Norman? It produces a Failure, not a hard exception. You can
> introspect Failures to keep them from getting thrown.)
>
Yep, that's what I thought I'd said :-) Obviously not clearly.
Another way of looking at it:
$ perl6 -e 'my $f = "eraseme.txt".IO.f;say $f.WHAT'
(Failure)
and you can coerce that to a bool without throwing as other examples in the
thread have shown.
perl6 -e 'my $f = "eraseme.txt".IO.f; say $f.WHAT; say ?$f'
(Failure)
False
Or plain old verbose:
if "eraseme.txt".IO.f {
say "exists";
} else {
say "does not exist";
}
It seems to me it only looks buggy when you are trying to do one liners and
you don't naturally get a boolean context.
--
Norman Gaywood, Computer Systems Officer
School of Science and Technology
University of New England
Armidale NSW 2351, Australia
ngayw...@une.edu.au http://turing.une.edu.au/~ngaywood
Phone: +61 (0)2 6773 2412 Mobile: +61 (0)4 7862 0062
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