Thank you haukex this is a good explanation.

In a sense am I being a little bit confused around what Devel:Peek is telling me, bearing in mind I am using a 5.14 version.

$n = unpack "C", pack "B", 128;
&print_val;

$n += $n;
&print_val;

#output
#SV = IV(0xe28558) at 0xe2855c
#  REFCNT = 1
#  FLAGS = (PADMY,IOK,pIOK)
#  IV = 128
# ###
#SV = IV(0xe28558) at 0xe2855c
#  REFCNT = 1
#  FLAGS = (PADMY,IOK,pIOK)
#  IV = 256
# ###

[download]

These are actually UV values then? but Perl is storing them as IV's. and the sum at the microprocessor level, adding 128 to itself, is carrying out a binary addition of a natural number.

I have only just found out about two's complement a couple of weeks ago, and I'm not sure where I stand on that just yet.

In reply to Re^4: Can I access and use UV types from perl? by Don Coyote
in thread Can I access and use UV types from perl? by Don Coyote

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