Are there special cases of any sort (e.g. different environments, architectures) where the pack/unpack achieve anything different ?

I don't know of any such examples wrt to the U0C* template.
But I'm pretty unknowledgeable when it comes to Unicode, so I likely wouldn't know anyway ;-)

In general, there are some instances where pack($template, $scalar) will lose information that unpack() has no hope of restoring.
For example, on a perl whose $Config{nvsize} is greater than $Config{doublesize}: 
>perl -wle "print 'ok' if 2.3 != unpack 'd', pack 'd', 2.3;"
ok

[download]
A similar thing could happen with the I or i templates on a perl whose $Config{ivsize} is greater than $Config{intsize}.

Cheers,
Rob

In reply to Re: pack on unpack with same template by syphilis
in thread pack on unpack with same template by jjmoka

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