This is not what you want to say
Indeed. I discovered this reading JavaFan's post.
What I think you meant to say
Perfect. I shall update.
a grouping of (usually but not always) 8 consecutive bits of physical storage
UTF8=0 storage format.
the problem being (as noted by others) that most people associate "byte" with (1)
If so, then reading 5 bytes produces a variable number of bytes*. That doesn't jive.
If I read 5 bytes from a file, what I get if 5 bytes as far as I'm concerned. I'm open to a better word that "byte" for this, but I haven't come across one.
One could possibly commandeer "octet"
An octet is simply an 8-bit byte. But since that's what byte means in all relevant circumstances anyway*, "octet" is no better than "byte".
* — Perl doesn't currently support systems with byte sizes other than 8.
There's also the small matter that it really doesn't make a whole lot of sense to use UTF-8-flag-on format to store something that is composed of octets, even if it is indeed possible to do.
No, but it can happen. Say you have:
# É as C9 in source. print $bin_fh "AX100ÉX";
And say one day you convert your source files to UTF-8.
# É as C3 E9 in source. use utf8; print $bin_fh "AX100ÉX";
The code is still fine, yet the string in the latter has UTF8=1.
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