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Have a look into the results of
#!/usr/bin/perl use strict; use warnings; use Devel::Peek; use Encode; #use utf8; binmode STDOUT, ":utf8"; my $string1 = "123\x{444}\x{444}\x{444}\x{444}"; _display ($string1, 'STRING1' ); my $utfstring = "123 \x{439}\x{439}\x{439}\x{439}"; _display ($utfstring, 'UTF_STRING' ); my ($ascii_but_utf, undef) = split ' ', $utfstring; _display ($ascii_but_utf, 'ASCII_BUT_UTF' ); #my $bytestring = encode ("UTF-8", "\x{444}\x{444}\x{444}\x{444}"); my $bytestring = "\x{444}\x{444}\x{444}\x{444}"; _display ($bytestring, 'BYTESTRING' ); my $mixedstring = "$ascii_but_utf$bytestring"; # simulate The Unicode +Bug here _display ($mixedstring, 'MIXEDSTRING' ); print "MIXEDSTRING and STRING1 are supposed to be identical...\n"; exit; ############### sub _display { my ($string, $name) = @_; print "$name:\n"; Dump $string; my $l1 = length($string); my $l2 = bytes::length($string); if ($l1 != $l2) { print "LENGTHs DIFFERS: length: $l1, bytes: $l2\n" } print "UTF IS ON\n" if utf8::is_utf8($string); print "\n"; }
and then check the difference you see for BYTESTRING when running

my $bytestring = encode ("UTF-8", "\x{444}\x{444}\x{444}\x{444}");


my $bytestring = "\x{444}\x{444}\x{444}\x{444}";

The Encode documentation has an Caveat about it:

CAVEAT: When you run "$octets = encode("utf8", $string)", then $octets might not be equal to $string. Though
both contain the same data, the UTF8 flag for $octets is always off. When you encode anything, the UTF8 flag
on the result is always off, even when it contains a completely valid utf8 string. See "The UTF8 flag" below.

In reply to Re: Unicode strings internals by Krambambuli
in thread [SOLVED] Unicode strings internals by vsespb

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