Note, the new 'use warnings' pragma allows for various fine tuning
of default and optional warnings -- including promoting any warning
category into FATALs for a given lexical scope. So chipmunk's
example can also be written as (assuming 5.6+):
for $invalue (qw/ 1 -10 abc /) {
eval{
use warnings FATAL=>qw/numeric/;
$invalue + 0
}; ### Is Number?
if ( $@ ) {
print "$invalue is *not* a Number; Details: $@\n";
} else {
print "$invalue appears to be a number.\n";
}
}
For details see the perllexwarn manpage, and the docs
for the warning.pm module.
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