| Subject: | Enhancement - function to test that value is numified |
Perl has inconsistence when work with Infinity:
perl -e 'my $s = "inf"; $s++; print $s+0'
0
perl -e 'my $s = "inf"+0; $s++; print $s+0'
inf
more info
http://www.perlmonks.org/?node_id=1025148
Consider the following example:
====
sub x
{
my (undef, $s) = split(' ', shift);
$s+0;
}
my $p = x("abc inf");
$p++;
print $p;
====
it will print "inf", but If I replace "$s+0" with "$s", it will print "ing".
So, to write Unit test for this code, I need a function which will be able to test that x() returns something numified (i.e. with +0).
I propose adding such function to Scala::Util.
(another reason why people might want to test in unit tests, if the particalar value numified, is performance,
huge array of numeric-only values takes less memory).
Currently something like this can be implemented using
B::class(B::svref_2object(\$_[0])) eq 'IV'
but the problem is, that use of B module considered a hack.