--- On Tue, 5/1/10, Jonathan Scott Duff <perlpi...@gmail.com> wrote:
> From: Jonathan Scott Duff <perlpi...@gmail.com>
> I'd imagine that the functionality will fall
> out of the ability to have nice failures because surely
> something like the following works now:
>
> subset Filename of Str where { $_ ~~ :f or
> fail "No such file: '$_'" }
> Perhaps s/fail/die/, but that seems like a means
> to your desired end.
Ah, the die works fine. However, "fail" causes that sub call to be skipped
altogether:
subset Filename of Str where { $_ ~~ :f or fail "$_ is not a filename" };
sub foo (Filename $name) {
say "Houston, we have a filename: $name";
}
foo($*EXECUTABLE_NAME);
say "before";
foo('no_such_file');
say "after";
Output:
Houston, we have a filename: /Users/ovid/bin/perl6
before
after
Is this a bug or just documented behavior that I don't know about?
Cheers,
Ovid
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