3 $utf8::hint_bits = 0x00800000;
6 $^H |= $utf8::hint_bits;
7 $enc{caller()} = $_[1] if $_[1];
11 $^H &= ~$utf8::hint_bits;
15 require "utf8_heavy.pl";
16 goto &$AUTOLOAD if defined &$AUTOLOAD;
17 Carp::croak("Undefined subroutine $AUTOLOAD called");
25 utf8 - Perl pragma to enable/disable UTF-8 in source code
34 WARNING: The implementation of Unicode support in Perl is incomplete.
35 See L<perlunicode> for the exact details.
37 The C<use utf8> pragma tells the Perl parser to allow UTF-8 in the
38 program text in the current lexical scope. The C<no utf8> pragma
39 tells Perl to switch back to treating the source text as literal
40 bytes in the current lexical scope.
42 This pragma is primarily a compatibility device. Perl versions
43 earlier than 5.6 allowed arbitrary bytes in source code, whereas
44 in future we would like to standardize on the UTF-8 encoding for
45 source text. Until UTF-8 becomes the default format for source
46 text, this pragma should be used to recognize UTF-8 in the source.
47 When UTF-8 becomes the standard source format, this pragma will
48 effectively become a no-op.
50 Enabling the C<utf8> pragma has the following effects:
56 Bytes in the source text that have their high-bit set will be treated
57 as being part of a literal UTF-8 character. This includes most literals
58 such as identifiers, string constants, constant regular expression patterns
63 In the absence of inputs marked as UTF-8, regular expressions within the
64 scope of this pragma will default to using character semantics instead
67 @bytes_or_chars = split //, $data; # may split to bytes if data
70 use utf8; # force char semantics
71 @chars = split //, $data; # splits characters
76 L<perlunicode>, L<bytes>